2021, 北海道大学大学院保健科学研究院, 優秀論文賞　　　　　　　　　　　　　　　

2021, 日本放射線技術学会 北海道支部, 学術賞　　　　　　　　　　　　　　　

2017, 北海道大学, 総長賞(奨励賞)　　　　　　　　　　　　　　　

2012, 北海道大学大学院保健科学研究院, 研究院長賞　　　　　　　　　　　　　　　

2008, 日本放射線技術学会, 滝内賞　　　　　　　　　　　　　　　

Comparison of Emergency Transport Times Affected by Road Closures Under Normal Conditions and During an Earthquake Disaster.
Ayana Imatani, Kazuki Ohashi, Katsuhiko Ogasawara
Disaster medicine and public health preparedness, 19, e214, 06 Aug. 2025, [International Magazine]
English, Scientific journal, OBJECTIVES: This study aimed to examine emergency transport times considering closed roads to propose more efficient transport routes to improve the life-saving rate for seriously injured people in Sapporo during an earthquake disaster. Sapporo is the capital of Hokkaido and has a population of approximately 1.97 million as of 2020. METHODS: Transport routes were created using publicly available data and a geographic information system (GIS), and the emergency transport times in Sapporo were subsequently calculated. Closed roads were defined as roads in "areas with high liquefaction potential" and "areas with a total house destruction rate ≥20%." RESULTS: Closed roads were concentrated in the northeastern part of the city, as were extended emergency transport times, with delays of up to 101 min. Other areas did not experience significant delays. CONCLUSIONS: The emergency transport time was prolonged in areas with closed roads. Triage posts and semi-closed roads were also suggested to affect emergency transport times. To minimize emergency transport times, it is necessary to consider having nurses and doctors ride in ambulances to triage patients, and to coordinate with disaster base hospitals outside of the city to transport seriously injured people.

Efficacy and safety of stem cell therapy for acute and subacute ischemic stroke: a systematic review and meta-analysis.
Toshiya Osanai, Soichiro Takamiya, Yasuhiro Morii, Katsuhiko Ogasawara, Kiyohiro Houkin, Miki Fujimura
Scientific reports, 15, 1, 21214, 21214, 01 Jul. 2025, [International Magazine]
English, Scientific journal, The efficacy of stem cell therapy for ischemic stroke in terms of functional outcomes remains unclear. We conducted a systematic review and meta-analysis of randomized controlled trials (PROSPERO: CRD42024503763) to assess the efficacy and safety of stem cell therapy for acute/subacute ischemic stroke, focusing on long-term outcomes. Studies of patients undergoing stem cell transplantation within 1 month of stroke onset were included. We searched five databases for publications up to January 17, 2024. Summary data were extracted from published reports. The primary outcome was the modified Rankin Scale (mRS) score. Measures of effect were risk ratios (RRs) with 95% confidence intervals (CIs). A random-effects model was used when I2 was > 25%; otherwise, a fixed-effects model was used. Common serious adverse events were epilepsy, gastrointestinal disorders, and cardiac disorders. The risk of bias was assessed using the Cochrane Risk of Bias tool version 2. In total, 13 trials involving 872 (519 men) patients were included. The 1-year incidence of mRS scores 0-1 was higher in the cell-therapy group (45/195) than that in the control group (23/179; RR = 1.74 [95% CI = 1.09-2.77]; p = 0.020; I2 = 0%). The 90-day incidence of mRS scores 0-2 was also higher (RR = 1.31 [95% CI = 1.01-1.70]; p = 0.044; I2 = 0%). No significant differences were observed in serious adverse events or mortality. Stem cell therapy for acute/subacute ischemic stroke within 1 month of onset is safe and significantly improves long-term functional outcomes, although the mechanisms of action need to be elucidated and treatment protocols standardized to establish stem cell therapy as a standard care option for ischemic stroke.

Prediction of Post-Bath Body Temperature Using Fuzzy Inference Systems with Hydrotherapy Data.
Feng Han, Minghui Tang, Ziheng Zhang, Kenji Hirata, Yoji Okugawa, Yunosuke Matsuda, Jun Nakaya, Katsuhiko Ogasawara, Kohsuke Kudo
Healthcare (Basel, Switzerland), 13, 9, 23 Apr. 2025, [International Magazine]
English, Scientific journal, Background/Objectives: Widely known for its therapeutic benefits, hydrotherapy utilizes water's physical properties, such as temperature, hydrostatic pressure, and viscosity, to influence physiological responses. Among these, body temperature modulation plays a crucial role in enhancing circulatory function, muscle relaxation, and metabolic processes. While hydrotherapy can improve systemic health, particularly cardiac function, improper temperature control poses risks, especially for vulnerable populations such as the elderly or individuals with thermoregulatory impairments. Therefore, accurately predicting post-bath body temperature is essential for ensuring safety and optimizing therapeutic outcomes. Methods: This study explored the use of fuzzy inference systems to predict post-bath body temperature, leveraging an adaptive neuro-fuzzy inference system, evolutionary fuzzy inference system (EVOFIS), and enhanced Takagi-Sugeno fuzzy system. These models were compared with random forest and support vector machine models using hydrotherapy-related data. Results: The results show that EVOFIS outperformed other models, particularly in predicting deep body temperature, which is clinically significant as it is closely linked to core physiological regulation. Conclusions: The ability to accurately forecast deep-temperature dynamics enables proactive management of hyperthermia risk, supporting safer hydrotherapy practices for at-risk groups. These findings highlight the potential of FIS-based models for non-invasive temperature prediction, contributing to enhanced safety and personalization in hydrotherapy applications.

The usefulness of X-ray output management in general radiography systems using exposure index
Kazuhiro Ogasawara, Shinya Ohwada, Rie Tachibana, Katsuhiko Ogasawara
Journal of X-Ray Science and Technology: Clinical Applications of Diagnosis and Therapeutics, 33, 1, 204, 210, SAGE Publications, 13 Jan. 2025
Scientific journal, Purpose

The periodic quality control of X-ray devices is important for obtaining optical medical images and determining the appropriate X-ray exposure dose. Additionally, the measurement of the X-ray output is constrained by time, technical aspects, and expenses. Therefore, we investigated the usefulness of a simple method for managing X-ray output using an Exposure Index (EI).

Methods

The entire surface of the flat panel detector was X-ray-irradiated every Friday at the time of end-of-work inspection under the condition that the recorded EI was approximately 1000. The EI and exposure dose were measured, and the linearity and accuracy were evaluated.

Results

The output gradually decreased from the start of the measurements in Room 1 and stabilized after the output was adjusted. The relationship between exposure dose and EI showed high linearity, with R² > 0.99, and the CV of EI was less than 2.41%, indicating high reproducibility.

Conclusions

We demonstrated that the results of constancy tests can be easily quantified using EI. The EI method can manage the X-ray output with good reproducibility.

Co-occurrence Network Analysis of Tweets on Breast Cancer Screening: Challenges for Utilizing SNS for Information Dissemination and Improving Screening Rates
Yamashina Hiroko, Zhang Hongjian, Ogasawara Katsuhiko
Nihon Nyugan Kenshin Gakkaishi (Journal of Japan Association of Breast Cancer Screening), 34, 1, 86, 96, Japan Association of Breast Cancer Screening, 2025
Japanese, Breast cancer among Japanese women has been steadily increasing, with 97,142 patients in 2019 and 15,912 deaths in 2022. Despite this, the breast cancer screening rate remains below the target of 60%, staying at 47.4% in 2022. Effective information dissemination via the internet and social networks is essential to improve screening rates. This study conducted a co-occurrence network analysis of tweets containing the terms “breast cancer” and “screening” from 2011 to 2018. The results showed that “receive” and “go” were consistently top terms, indicating a focus on screening behavior. “Cervical cancer” also frequently co-occurred, suggesting a link with gynecological screenings. Terms like “today,” “think,” and “say” indicate that users’ tweets reflect their real-time thoughts and opinions on screening. Terms such as “screening,” “checkup,” “health check,” “company,” “city,” “coupon,” and “free” show that practical information about screenings and subsidies is shared on SNS. Specific examination methods like “mammography,” “ultrasound,” and “palpation” were often mentioned, with “mammography” co-occurring with “painful,” indicating concerns about the discomfort of the procedure. Addressing these fears alongside using SNS for information dissemination is crucial. The analysis also found that the topics of tweets about breast cancer screening remained stable from fiscal 2011 to 2018, but notable individuals influenced interest in certain years. This suggests that leveraging public figures can effectively raise awareness about breast cancer screening. In conclusion, the study highlights the importance of using SNS for effective information dissemination and addressing screening-related concerns to improve breast cancer screening rates.

Acute effects of static stretching on postural control during a maximum forward-leaning task in young and older adults
Kensuke Oba, Mina Samukawa, Moeka Ohta, Izumi Oka, Satoshi Kasahara, Teppei Suzuki, Katsuhiko Ogasawara
Isokinetics and Exercise Science, SAGE Publications, 17 Dec. 2024
Scientific journal, Background

Static stretching (SS) is effective in increasing flexibility and neuromuscular function, leading to changes in postural control.

Objective

This study aimed to examine the acute effects of SS on ankle plantar flexors and dynamic postural control during a maximum forward-leaning task in young and older adults.

Methods

Twenty-eight university students and 22 community-dwelling older adults were included in this study. The participants performed 5 sets of 1-min SS for the ankle plantar flexors of both legs with standing on a stretching board. Ankle dorsiflexion range of motion (ROM) and center of pressure (COP) during the maximum forward-leaning task, the COP area, and the anterior limit of stability were assessed before and after SS.

Results

SS increased ankle dorsiflexion ROM, COP velocity, and anterior limit of stability, whereas changes in the COP area were not significant after SS. Furthermore, there were no differences in the changes in postural control between young and older adults, whereas ROM increase was greater in older adults than in young adults.

Conclusions

These findings suggest that SS can improve postural control and can serve as a simple, low-risk intervention to reduce the risk of falls in older, at-risk adult populations.

Assessing regional healthcare service efficiency in China: a ten-year data envelopment analysis [2010–2019]
Jieyu Zhao, Katsuhiko Ogasawara
Journal of Hospital Management and Health Policy, 8, 23, 23, AME Publishing Company, Dec. 2024
Scientific journal

Cost-effectiveness analysis for multi adverse events of proton beam therapy for pediatric medulloblastoma in Japan
Takaaki Yoshimura, Yasuhiro Morii, Honoka Tamori, Ryuki Kita, Takayuki Hashimoto, Hidefumi Aoyama, Katsuhiko Ogasawara
Journal of Radiation Research, Oxford University Press (OUP), 19 Nov. 2024
Scientific journal, Abstract

Medulloblastomas are one of the most common malignant cancers of the central nervous system in children. Proton beam therapy (PBT) is expected to provide equivalent tumor control to photon therapy while reducing the various adverse events caused by irradiation. Few studies have considered the cost-effectiveness of PBT for pediatric medulloblastoma, considering the multiple adverse effects and reflecting on the latest treatment advancements. A cost-utility analysis of PBT for pediatric medulloblastoma was conducted in a Japanese setting and compared to conventional photon therapy. The analysis was conducted from the public healthcare payer’s perspective, and direct costs for the treatment of radiation therapy and radiation-induced adverse events were included. A Markov model was used, and the health states of secondary cancer, hypothyroidism and hearing loss were defined as adverse events. The time horizon was the lifetime. Incremental cost-effectiveness ratio (ICER) was used as a measurement of cost-effectiveness, with quality-adjusted life years (QALYs) used as an outcome. The costs were estimated from the national fee schedule, and the utility and transition probabilities were estimated from published literature. PBT incurred an additional 1387116 Japanese yen (JPY) and 1.56 QALYs to the comparator. The ICER was JPY 887053/QALY, indicating that PBT was cost-effective, based on the reference value of JPY 5 million/QALY used in the Japanese cost-effectiveness analysis. Deterministic sensitivity analysis showed that the ICER ranged from JPY 284782/QALY to JPY 1918603/QALY as a result of deterministic sensitivity analysis, and probabilistic sensitivity analysis showed that PBT was cost-effective, with a probability of 91.7%.

北海道におけるCOVID-19パンデミック前後の疾患別死亡率の変動に関する研究　　　　　　　　　　　　　　　
趙 捷宇, 大橋 和貴, 杉村 直孝, 小笠原 克彦
医療情報学連合大会論文集, 44回, 1373, 1374, (一社)日本医療情報学会, Nov. 2024
Japanese

破裂脳動脈瘤に対するコイル塞栓とクリッピング後の周術期管理の医療経済学的検討 新規脳血管攣縮予防薬導入による影響　　　　　　　　　　　　　　　
栗栖 宏多, 長内 俊也, 大橋 和貴, 趙 捷宇, 小笠原 克彦, 杉山 拓, 藤村 幹
日本脳神経血管内治療学会学術集会抄録集, 40回, 459, 459, (一社)日本脳神経血管内治療学会, Nov. 2024
Japanese

北海道におけるNICU病床の適正配置に向けた病床使用率の将来推計　　　　　　　　　　　　　　　
大橋 和貴, 藤原 健祐, 谷川 琢海, 小笠原 克彦
医療情報学連合大会論文集, 44回, 996, 997, (一社)日本医療情報学会, Nov. 2024
Japanese

北海道におけるCOVID-19パンデミック前後の疾患別死亡率の変動に関する研究　　　　　　　　　　　　　　　
趙 捷宇, 大橋 和貴, 杉村 直孝, 小笠原 克彦
医療情報学連合大会論文集, 44回, 1373, 1374, (一社)日本医療情報学会, Nov. 2024
Japanese

Spatial accessibility of home visiting nursing: An exploratory ecological study.
Kazuki Ohashi, Miho Sato, Kensuke Fujiwara, Takumi Tanikawa, Yasuhiro Morii, Katsuhiko Ogasawara
Health science reports, 7, 9, e70078, Sep. 2024, [International Magazine]
English, Scientific journal, BACKGROUND AND AIMS: Japan is one of the oldest societies worldwide and manages a system of care for older adults in the community. In the 2000s, a community-based integrated care system was introduced to enable older adults to live in their neighborhoods. Home visiting nursing (HVN) is a crucial component of this system; however, the current and future shortage of home visiting nurses is a concern. Thus, HVN services may not be available in some areas; however, no indicators of the accessibility of HVN services have been developed. Developing accessibility indicators will serve as a standard for considering the allocation of health care resources and supporting future nursing policies that improve regional disparities. METHODS: We estimated the population-weighted spatial accessibility index (PWSAI) of HVN services in Hokkaido, using the two-step floating catchment area method (2SFCA). The 2SFCA comprised population, location of HVN agencies, number of home visiting nurses, and travel time. A multivariate regression model was run for the number of HVN users in each municipality as the objective variable to test the validity of the PWSAI; the number of home care support clinics, home care support hospitals, HVN agencies, home visiting nurses, home visiting nurses (24/7), total beds in health care facilities for older adults, and nursing homes for older adults were included as other explanatory variables. RESULTS: The PWSAI was median 9.0 [interquartile range: 6.2-11.8]. The distribution of the PWSAI was mapped to visualize the existence of regional differences. As a result of the conditional autoregressive model, PWSAI and home visiting nurses (24/7) were significant, Exp(β) and 95% credible interval were 1.043 [1.015-1.076] and 1.021 [1.006-1.036], respectively. CONCLUSION: The PWSAI was positively correlated with the number of HVN users in each municipality and can serve as an indicator for assessing the accessibility of HVN.

血行再建に残された課題 CEAにおける患者安全と外科教育のための手術映像分析研究 頸動脈剥離における組織加速度評価　　　　　　　　　　　　　　　
杉山 拓, 伊東 雅基, 杉森 博行, 唐 明輝, 中村 俊孝, 小笠原 克彦, 藤村 幹
The Mt. Fuji Workshop on CVD, 41, 76,82, 83, The Mt. Fuji Workshop on CVD事務局, Jul. 2024
Japanese

Association between oral frailty and Prevotella percentage in the oral microbiota of community-dwelling older adults who participated in the CHEER Iwamizawa project, Japan.
Chizuru Kimura, Kazuhito Miura, Yutaka Watanabe, Haruhisa Baba, Kimiya Ozaki, Akira Hasebe, Tokiyoshi Ayabe, Kiminori Nakamura, Shinji Nakaoka, Katsuhiko Ogasawara, Teppei Suzuki, Hiroshi Saito, Takashi Kimura, Akiko Tamakoshi, Yutaka Yamazaki
Journal of oral rehabilitation, 08 Jun. 2024, [International Magazine]
English, Scientific journal, BACKGROUND: Prevotella bacteria are associated with inherent diseases of the oral cavity, such as periodontal disease, and systemic diseases. Oral frailty (OF) has been associated with nursing necessity and death. However, the relationship between OF and oral microbiota has not been fully clarified. OBJECTIVE: This cross-sectional study investigated the association between OF and Prevotella percentage in the oral microbiota of community-dwelling older adults. METHODS: Oral bacteria species from saliva were identified in 208 community-dwelling older individuals aged ≥60 years in Japan. The proportion of Prevotella in the oral microbiota was classified into three tertile groups, and its relationship with each test item for OF (number of remaining teeth, masticatory performance, oral diadochokinesis, tongue pressure, difficulties eating tough foods, difficulties swallowing tea or soup, number of applicable OF judgement items, and existence of OF) was examined using ordinal logistic regression analysis. RESULTS: The Prevotella proportions were classified into lower, middle and upper groups, comprising 70, 69 and 69 participants, respectively. The three groups showed a significant relationship between the number of remaining teeth (odds ratio [OR]: 0.946, 95% confidence interval [CI]: 0.915-0.977), masticatory performance (OR: 0.897, 95% CI: 0.844-0.953), number of applicable OF judgement items (OR: 1.477, 95% CI: 1.14-1.915), and existence of OF (OR: 4.194, 95% CI: 1.519-11.576). CONCLUSION: The proportion of Prevotella in oral microbiota was high in individuals with OF. Among the older adults, the type of oral microbiota and systemic diseases may be related to the examination and management of oral function decline.

Assessment of changes in vessel area during needle manipulation in microvascular anastomosis using a deep learning-based semantic segmentation algorithm: A pilot study.
Minghui Tang, Taku Sugiyama, Ren Takahari, Hiroyuki Sugimori, Takaaki Yoshimura, Katsuhiko Ogasawara, Kohsuke Kudo, Miki Fujimura
Neurosurgical review, 47, 1, 200, 200, 09 May 2024, [International Magazine]
English, Scientific journal, Appropriate needle manipulation to avoid abrupt deformation of fragile vessels is a critical determinant of the success of microvascular anastomosis. However, no study has yet evaluated the area changes in surgical objects using surgical videos. The present study therefore aimed to develop a deep learning-based semantic segmentation algorithm to assess the area change of vessels during microvascular anastomosis for objective surgical skill assessment with regard to the "respect for tissue." The semantic segmentation algorithm was trained based on a ResNet-50 network using microvascular end-to-side anastomosis training videos with artificial blood vessels. Using the created model, video parameters during a single stitch completion task, including the coefficient of variation of vessel area (CV-VA), relative change in vessel area per unit time (ΔVA), and the number of tissue deformation errors (TDE), as defined by a ΔVA threshold, were compared between expert and novice surgeons. A high validation accuracy (99.1%) and Intersection over Union (0.93) were obtained for the auto-segmentation model. During the single-stitch task, the expert surgeons displayed lower values of CV-VA (p < 0.05) and ΔVA (p < 0.05). Additionally, experts committed significantly fewer TDEs than novices (p < 0.05), and completed the task in a shorter time (p < 0.01). Receiver operating curve analyses indicated relatively strong discriminative capabilities for each video parameter and task completion time, while the combined use of the task completion time and video parameters demonstrated complete discriminative power between experts and novices. In conclusion, the assessment of changes in the vessel area during microvascular anastomosis using a deep learning-based semantic segmentation algorithm is presented as a novel concept for evaluating microsurgical performance. This will be useful in future computer-aided devices to enhance surgical education and patient safety.

Optimal Transport System for Acute Ischemic Stroke Patients: A Cost-Effectiveness Analysis.
Yasuhiro Morii, Toshiya Osanai, Kensuke Fujiwara, Yuji Tani, Soichiro Takamiya, Takumi Tanikawa, Katsuhiko Ogasawara
Studies in health technology and informatics, 310, 1558, 1559, 25 Jan. 2024, [International Magazine]
English, Scientific journal, This study conducted cost utility analysis comparing 4 systems of transporting acute ischemic stroke patients in Hokkaido, Japan. Hypothetical patients were generated on a geographic information system, and their outcomes were estimated according to their transport time to hospitals administering tissue plasminogen activator and/or endovascular thrombectomy. The transport systems where a neurointerventionist traveled for earlier endovascular thrombectomy were most cost-effective in some rural areas, while direct transportation to comprehensive stroke centers was more cost-effective in other areas.

Deep learning-based video-analysis of instrument motion in microvascular anastomosis training.
Taku Sugiyama, Hiroyuki Sugimori, Minghui Tang, Yasuhiro Ito, Masayuki Gekka, Haruto Uchino, Masaki Ito, Katsuhiko Ogasawara, Miki Fujimura
Acta neurochirurgica, 166, 1, 6, 6, 12 Jan. 2024, [Peer-reviewed], [International Magazine]
English, Scientific journal, PURPOSE: Attaining sufficient microsurgical skills is paramount for neurosurgical trainees. Kinematic analysis of surgical instruments using video offers the potential for an objective assessment of microsurgical proficiency, thereby enhancing surgical training and patient safety. The purposes of this study were to develop a deep-learning-based automated instrument tip-detection algorithm, and to validate its performance in microvascular anastomosis training. METHODS: An automated instrument tip-tracking algorithm was developed and trained using YOLOv2, based on clinical microsurgical videos and microvascular anastomosis practice videos. With this model, we measured motion economy (procedural time and path distance) and motion smoothness (normalized jerk index) during the task of suturing artificial blood vessels for end-to-side anastomosis. These parameters were validated using traditional criteria-based rating scales and were compared across surgeons with varying microsurgical experience (novice, intermediate, and expert). The suturing task was deconstructed into four distinct phases, and parameters within each phase were compared between novice and expert surgeons. RESULTS: The high accuracy of the developed model was indicated by a mean Dice similarity coefficient of 0.87. Deep learning-based parameters (procedural time, path distance, and normalized jerk index) exhibited correlations with traditional criteria-based rating scales and surgeons' years of experience. Experts completed the suturing task faster than novices. The total path distance for the right (dominant) side instrument movement was shorter for experts compared to novices. However, for the left (non-dominant) side, differences between the two groups were observed only in specific phases. The normalized jerk index for both the right and left sides was significantly lower in the expert than in the novice groups, and receiver operating characteristic analysis showed strong discriminative ability. CONCLUSION: The deep learning-based kinematic analytic approach for surgical instruments proves beneficial in assessing performance in microvascular anastomosis. Moreover, this methodology can be adapted for use in clinical settings.

Are There Shortages and Regional Disparities in Lecanemab Treatment Facilities? A Cross-Sectional Study
Kazuki Ohashi, Ikuko Takahashi-Iwata, Zhao Jieyu, Ken Sakushima, Ichiro Yabe, Katsuhiko Ogasawara
Health Services Insights, Jan. 2024
Scientific journal

The Capacitated Maximal Covering Location Problem Improves Access to Stroke Treatment: A Cross-Sectional Simulation Study.
Kyohei Bando, Kazuki Ohashi, Kensuke Fujiwara, Toshiya Osanai, Yasuhiro Morii, Takumi Tanikawa, Miki Fujimura, Katsuhiko Ogasawara
Health services insights, 17, 11786329241263699, 11786329241263699, 2024, [International Magazine]
English, Scientific journal, Disparities in accessing advanced stroke treatment have been recognized as a policy challenge in multiple countries, including Japan, necessitating priority solutions. Nevertheless, more practical healthcare policies must be implemented due to the limited availability of healthcare staff and financial resources in most nations. This study aimed to evaluate the supply and demand balance of mechanical thrombectomy (MT) and identify areas with high priority for enhancing stroke centers. The target area of this study was Hokkaido, Japan. We adopted the capacitated maximal covering location problem (CMCLP) to propose an optimal allocation without increasing the number of medical facilities. Four realistic scenarios with varying levels of total MT supply capacity for Primary stroke centers and assuming a range of 90 minutes by car from the center were created and simulated. From scenarios 1 to 4, the coverage increased by approximately 53% to 85%, scenarios 2 and 3 had 5% oversupply, and scenario 4 had an oversupply of approximately 20%. When the supply capacity cap was eliminated and 8 PSCs received 31 or more patients, they became priority enhancement targets. The CMCLP estimates demand coverage considering the supply and demand balance and indicates areas and facilities where MT supply capacity enhancement is a priority.

Acute effects of static and dynamic stretching for ankle plantar flexors on postural control during the single-leg standing task.
Kensuke Oba, Naoto Kyotani, Minori Tanaka, Miho Komatsuzaki, Satoshi Kasahara, Katsuhiko Ogasawara, Mina Samukawa
Sports biomechanics, 1, 11, 27 Dec. 2023, [International Magazine]
English, Scientific journal, Static stretching (SS) and dynamic stretching (DS) are widely used as warm-ups before sports. However, whether stretching affects postural control remains unclear. We compared the effects of SS and DS on the plantar flexors and postural control during single-leg standing. Fifteen healthy young participants performed SS, DS, or no stretching (control). The stretch condition consisted of four sets lasting 30 s each. The control condition was a rest with standing for 210 s. Center of pressure (COP) displacement was measured using a force plate before and after each intervention to assess postural control during the single-leg standing task. The COP area, COP velocity, and anteroposterior (COPAP) and mediolateral (COPML) range were calculated. DS significantly decreased in the COPML range (21.5 ± 4.1 to 19.0 ± 2.5 mm; P = 0.02), COP velocity (33.8 ± 7.6 to 29.8 ± 6.5 mm/s; P < 0.01), and COP area (498.6 ± 148.3 to 393.3 ± 101.1 mm2; P < 0.01), whereas SS did not change in the COP parameters (COP area 457.2 ± 108.3 to 477.8 ± 106.1 mm2, P = .49; COP velocity 31.2 ± 4.2 to 30.7 ± 5.8 mm/s, P = 0.60; COPAP 25.4 ± 3.1 to 25.3 ± 3.2 mm, P = 0.02; COPML 20.7 ± 3.3 to 21.1 ± 2.5 mm, P = 0.94). Therefore, DS of the plantar flexors enhances postural control during single-leg standing and may be effective for both injury prevention and performance enhancement.

Optimal allocation of physicians improves accessibility and workload disparities in stroke care.
Kazuki Ohashi, Toshiya Osanai, Kyohei Bando, Kensuke Fujiwara, Takumi Tanikawa, Yuji Tani, Soichiro Takamiya, Hirotaka Sato, Yasuhiro Morii, Tomoki Ishikawa, Katsuhiko Ogasawara
International journal for equity in health, 22, 1, 233, 233, 07 Nov. 2023, [International Magazine]
English, Scientific journal, BACKGROUND: Inequalities in access to stroke care and the workload of physicians have been a challenge in recent times. This may be resolved by allocating physicians suitable for the expected demand. Therefore, this study analyzes whether reallocation using an optimization model reduces disparities in spatial access to healthcare and excessive workload. METHODS: This study targeted neuroendovascular specialists and primary stroke centers in Japan and employed an optimization model for reallocating neuroendovascular specialists to reduce the disparity in spatial accessibility to stroke treatment and workload for neuroendovascular specialists in Japan. A two-step floating catchment area method and an inverted two-step floating catchment area method were used to estimate the spatial accessibility and workload of neuroendovascular specialists as a potential crowdedness index. Quadratic programming has been proposed for the reallocation of neuroendovascular specialists. RESULTS: The reallocation of neuroendovascular specialists reduced the disparity in spatial accessibility and the potential crowdedness index. The standard deviation (SD) of the demand-weighted spatial accessibility index improved from 125.625 to 97.625. Simultaneously, the weighted median spatial accessibility index increased from 2.811 to 3.929. Additionally, the SD of the potential crowdedness index for estimating workload disparity decreased from 10,040.36 to 5934.275 after optimization. The sensitivity analysis also showed a similar trend of reducing disparities. CONCLUSIONS: The reallocation of neuroendovascular specialists reduced regional disparities in spatial accessibility to healthcare, potential crowdedness index, and disparities between facilities. Our findings contribute to planning health policies to realize equity throughout the healthcare system.

訪問看護サービスの空間的アクセシビリティに関する探索的研究　　　　　　　　　　　　　　　
大橋 和貴, 金 絢加, 佐藤 三穂, 鷲見 尚己, 谷川 琢海, 小笠原 克彦
医療情報学連合大会論文集, 43回, 744, 746, (一社)日本医療情報学会, Nov. 2023
Japanese

Access to mechanical thrombectomy and ischemic stroke mortality in Japan: a spatial ecological study
Kazuki Ohashi, Toshiya Osanai, Kensuke Fujiwara, Takumi Tanikawa, Yuji Tani, Soichiro Takamiya, Hirotaka Sato, Yasuhiro Morii, Katsuhiko Ogasawara
Frontiers in Neurology, 14, Frontiers Media SA, 05 Sep. 2023
Scientific journal, Background

Advances in stroke treatment have greatly improved outcomes; however, disparities in access to treatment might increase. Achieving equitable access to stroke treatment is a health policy challenge, as rapid treatment is essential for positive outcomes. This ecological cross-sectional study aimed to determine the relationship between the disparities in spatial accessibility to mechanical thrombectomy (SAMT) and stroke mortality rates in Japan, hypothesizing that disparities in SAMT may increase the differences in stroke mortality between regions.

Methods

We used the average number of ischemic stroke (IS) deaths between 2020 and 2021 as the response variable; and SAMT, medical resources, and socioeconomic characteristics of each municipality as explanatory variables. A conditional autoregressive model was used to examine the association between the risk of stroke mortality and SAMT. The standardized mortality ratio (SMR) was mapped to understand the nationwide disparities in stroke mortality risk.

Results

The median number of IS deaths was 17.5 persons per year in the municipalities (2020 to 2021). The study also found that municipalities with low SAMT were located in the northern part of Japan. The non-spatial regression model results indicated that poor accessibility, a small proportion of bachelor’s degrees or higher, and a high proportion of workers in secondary industries were related to high IS mortality. Three models were evaluated using spatial analysis; Model 1 with accessibility indicators alone, Model 2 with medical resources added to Model 1, and Model 3 with socioeconomic characteristics added to Model 2. In Models 1 and 2, the population-weighted spatial accessibility index (PWSAI) showed a significant negative relationship with stroke mortality. However, this was not evident in Model 3. Mapping using Model 3 showed that the high-risk areas were predominantly located in northern Japan, excluding Hokkaido.

Conclusion

Access to mechanical thrombectomy was estimated, and regional differences were observed. The relationship between accessibility and IS mortality is unknown; however, regardless of accessibility, municipalities with a high proportion of workers in secondary industries and a small proportion with bachelor’s degrees or above are at risk of death from stroke.

Tissue Acceleration as a Novel Metric for Surgical Performance During Carotid Endarterectomy.
Taku Sugiyama, Masaki Ito, Hiroyuki Sugimori, Minghui Tang, Toshitaka Nakamura, Katsuhiko Ogasawara, Hitoshi Matsuzawa, Naoki Nakayama, Sanju Lama, Garnette R Sutherland, Miki Fujimura
Operative neurosurgery (Hagerstown, Md.), 04 Jul. 2023, [International Magazine]
English, Scientific journal, BACKGROUND AND OBJECTIVES: Gentle tissue handling to avoid excessive motion of affected fragile vessels during surgical dissection is essential for both surgeon proficiency and patient safety during carotid endarterectomy (CEA). However, a void remains in the quantification of these aspects during surgery. The video-based measurement of tissue acceleration is presented as a novel metric for the objective assessment of surgical performance. This study aimed to evaluate whether such metrics correlate with both surgeons' skill proficiency and adverse events during CEA. METHODS: In a retrospective study including 117 patients who underwent CEA, acceleration of the carotid artery was measured during exposure through a video-based analysis. Tissue acceleration values and threshold violation error frequencies were analyzed and compared among the surgeon groups with different surgical experience (3 groups: novice, intermediate, and expert). Multiple patient-related variables, surgeon groups, and video-based surgical performance parameters were compared between the patients with and without adverse events during CEA. RESULTS: Eleven patients (9.4%) experienced adverse events after CEA, and the rate of adverse events significantly correlated with the surgeon group. The mean maximum tissue acceleration and number of errors during surgical tasks significantly decreased from novice, to intermediate, to expert surgeons, and stepwise discriminant analysis showed that the combined use of surgical performance factors could accurately discriminate between surgeon groups. The multivariate logistic regression analysis revealed that the number of errors and vulnerable carotid plaques were associated with adverse events. CONCLUSION: Tissue acceleration profiles can be a novel metric for the objective assessment of surgical performance and the prediction of adverse events during surgery. Thus, this concept can be introduced into futuristic computer-aided surgeries for both surgical education and patient safety.

Regional disparity in the provision of rehabilitation services using the open data from the Japanese national claims database: an ecological study
Yasuhiro Morii, Kagari Abiko, Tomoki Ishikawa, Kensuke Fujiwara, Keiko Konomura, Katsuhiko Ogasawara
BMJ Open, 13, 6, e071670, e071670, BMJ, 20 Jun. 2023
Scientific journal, Objectives

There are few reports on regional differences in the supply/utilisation balance and provision of rehabilitation services. This study analysed those regional differences in Japan to help policymakers provide more uniform and efficient rehabilitation services and optimally allocate related resources.

Design

An ecological study.

Setting

47 prefectures and 9 regions in Japan in 2017.

Primary and secondary outcome measures

Primary measures were ‘supply/utilisation (S/U) ratio’, calculated by dividing rehabilitation supply converted to service units, by rehabilitation utilisation and ‘utilisation/expected utilisation (U/EU) ratio’, calculated by dividing utilisation by EU. The EU was defined as utilisation expected from the demography in each area. Data required to calculate these indicators were collected from open sources such as the National Database of Health Insurance Claims and Specific Health Checkups of Japan Open Data Japan.

Results

The S/U ratios were higher in Shikoku, Kyusyu, Tohoku and Hokuriku regions, and lower in Kanto and Tokai regions. The number of rehabilitation providers per population was higher mostly in the western part of Japan and lower mostly in the eastern part. The U/EU ratios were also higher mostly in the western part, and lower mostly in the eastern part such as Tohoku and Hokuriku regions. The same trend was seen for cerebrovascular disease and musculoskeletal disorder rehabilitation, which accounted for approximately 84% of rehabilitation services. For disuse syndrome rehabilitation, such a trend did not exist, and the U/EU ratio differed by prefectures.

Conclusions

The large surplus in rehabilitation supply in the western part was attributed to the greater number of providers, while the smaller surplus in Kanto and Tokai regions was due to the smaller amount of supply. The number of rehabilitation services used was lesser in the eastern part such as Tohoku and Hokuriku regions, indicating regional differences in the provision of rehabilitation services.

Regional assessment of medical care provision system by principal component analysis.
Kazuki Ohashi, Arisa Abe, Kensuke Fujiwara, Naoki Nishimoto, Katsuhiko Ogasawara
Journal of family medicine and primary care, 12, 4, 734, 742, Apr. 2023, [International Magazine]
English, Scientific journal, INTRODUCTION: The Japanese government has promoted policies ensuring standardized medical care across the secondary medical care areas (SMCAs); however, these efforts have not been evaluated, making the current conditions unclear. Multidimensional indicators could identify these differences; thus, this study examined the regional characteristics of the medical care provision system for 21 SMCAs in Hokkaido, Japan, and the changes from 1998 to 2018. MATERIALS AND METHODS: This study evaluated the characteristics of SMCAs by principal component analysis using multidimensional data related to the medical care provision system. Factor loadings and principal component scores were calculated, with the characteristics of each SMCA visually expressed using scatter plots. Additionally, data from 1998 to 2018 were analyzed to clarify the changes in SMCAs' characteristics. RESULTS: The primary and secondary principal components were Medical Resources and Geographical Factors, respectively. The Medical Resources components included the number of hospitals, clinics, and doctors, and an area's population of older adults, accounting for 65.28% of the total variance. The Geographical Factors components included the number of districts without doctors and the population and a land area of these districts, accounting for 23.20% of the variance. The accumulated proportion of variance was 88.47%. From 1998 to 2018, the area with the highest increase in Medical Resources was Sapporo, with numerous initial medical resources (-9.283 to -10.919). DISCUSSION: Principal component analysis summarized multidimensional indicators and evaluated SMCAs in this regional assessment. This study categorized SMCAs into four quadrants based on Medical Resources and Geographical Factors. Additionally, the difference in principal component scores between 1998 and 2018 emphasized the expanding gap in the medical care provision system among the 21 SMCAs.

Cost-effectiveness of seven-days-per-week rehabilitation schedule for acute stroke patients.
Yasuhiro Morii, Kagari Abiko, Toshiya Osanai, Jiro Takami, Takumi Tanikawa, Kensuke Fujiwara, Kiyohiro Houkin, Katsuhiko Ogasawara
Cost effectiveness and resource allocation : C/E, 21, 1, 12, 12, 01 Feb. 2023, [International Magazine]
English, Scientific journal, BACKGROUND: Rehabilitation is an essential medical service for patients who have suffered acute stroke. Although the effectiveness of 7-days-per-week rehabilitation schedule has been studied in comparison with 5- or 6-days-per-week rehabilitation schedule, its cost-effectiveness has not been analyzed. In this research, to help formulate more cost-effective medical treatments for acute stroke patients, we analyzed the cost-effectiveness of 7-days-per-week rehabilitation for acute stroke from public health payer's perspective, and public healthcare and long-term care payer's perspective in Japan. METHODS: Cost-effectiveness of 7-days-per-week rehabilitation for acute stroke patients was analyzed based on the result from a previous study using a Japanese database examining the efficacy of 7-days-per-week rehabilitation. Cost utility analysis was conducted by comparing 7-days-per-week rehabilitation with 5- or 6-days-per-week rehabilitation, with its main outcome incremental cost-effectiveness ratio (ICER) calculated by dividing estimated incremental medical and long-term care costs by incremental quality-adjusted life years (QALY). The costs were estimated using the Japanese fee table and from published sources. The time horizon was 5 years, and Markov modeling was used for the analysis. RESULTS: The ICER was $6339/QALY from public health payer's perspective, lower than 5,000,000 Yen/QALY (approximately US$37,913), which was the willingness-to-pay used for the cost-effectiveness evaluation in Japan. The 7-day-per-week rehabilitation was dominant from public healthcare and long-term care payer's perspective. The result of sensitivity analysis confirmed the results. CONCLUSION: The results indicated that 7-days-per-week rehabilitation for acute stroke rehabilitation was likely to be cost-effective.

Detecting inattentiveness caused by mind-wandering during a driving task: A behavioral study.
Kazuki Yoshida, Daisuke Sawamura, Mikio Yagi, Yu Nakashima, Ryuji Saito, Nao Yamamura, Katsuhiko Ogasawara, Shinya Sakai
Applied ergonomics, 106, 103892, 103892, Jan. 2023, [International Magazine]
English, Scientific journal, This study aims to investigate whether behavioral variability and participants' self-ratings can be used to detect mind-wandering while driving and to examine their effects on braking performance during a driving task. We created a novel driving task and added a sustained attention response task (SART). We examined the effects of mind-wandering on braking performance and whether mind-wandering could be detected from SART response variability. The within-subjects results showed that self-reports of inattentiveness during driving correlated significantly with SART response variability. Multiple regression analysis with brake reaction time as the dependent variable revealed a significant relationship between self-reports of inattentiveness and mind-wandering. However, there were no other consistent linear associations between mind-wandering and SART response variability. Our results not only suggest that inattentiveness to driving caused by mind-wandering impairs braking performance but also emphasize the importance and difficulty of detecting this state from behavioral data alone.

Assessment of the Efficiency of Non-Invasive Diagnostic Imaging Modalities for Detecting Myocardial Ischemia in Patients Suspected of Having Stable Angina.
Kunihiro Iwata, Katsuhiko Ogasawara
Healthcare (Basel, Switzerland), 11, 1, 22 Dec. 2022, [International Magazine]
English, Scientific journal, This study aimed to assess and compare the efficiency of non-invasive imaging modalities in detecting myocardial ischemia in patients with suspected stable angina as easy-to-understand indices. Our study included 1000 patients with chest pain and possible stable myocardial ischemia. The modalities to be assessed were cardiac magnetic resonance imaging (CMRI), single-photon emission computed tomography, positron emission computed tomography (PET), stress echocardiography, and fractional flow reserve derived from coronary computed tomography angiography (FFRCT). As a simulation study, we assumed that all five imaging modalities were performed on these patients, and a decision tree analysis was conducted. From the results, the following efficiencies were assessed and compared: (1) number of true positive (TP), false positive (FP), false negative (FN), and true negative (TN) test results; (2) positive predictive value (PPV); (3) negative predictive value (NPV); (4) post-test probability; (5) diagnostic accuracy (DA); and (6) number needed to diagnose (NND). In the basic settings (pre-test probability: 30%), PET generated the highest TP (267) and NPV (95%, 95% confidence interval (CI): 93-96%). In contrast, CMRI produced the highest TN (616), PPV (76%, 95% CI: 71-80%), and DA (88%, 95% CI: 86-90%) and the lowest NND (1.33, 95% CI: 1.24-1.47). Although FFRCT generated the highest TP (267) and lowest FN (33), it generated the highest FP (168). In terms of detecting myocardial ischemia, compared with the other modalities, PET and CMRI were more efficient. The results of our study might be helpful for both patients and medical professionals associated with their examination.

Validation of the Japanese version of the Body Image Scale for bladder cancer patients.
Miho Sato, Takahiro Osawa, Takashige Abe, Michitaka Honda, Madoka Higuchi, Shuhei Yamada, Jun Furumido, Hiroshi Kikuchi, Ryuji Matsumoto, Yasuyuki Sato, Yoshihiro Sasaki, Toru Harabayashi, Satoru Maruyama, Norikata Takada, Keita Minami, Hiroshi Tanaka, Ken Morita, Akira Kashiwagi, Sachiyo Murai, Yoichi M Ito, Katsuhiko Ogasawara, Nobuo Shinohara
Scientific reports, 12, 1, 21544, 21544, 13 Dec. 2022, [International Magazine]
English, Scientific journal, The Body Image Scale (BIS) is a 10-item tool that measures the body images of cancer patients. This study aims to validate the Japanese version of the BIS for bladder cancer patients. A multicenter cross-sectional survey was used to identify the participants, which included Japanese bladder cancer patients. The percentage of missing responses, internal consistency, and known-group validity were evaluated. The correlations between the BIS and two HRQOL instruments (the Bladder Cancer Index and the SF-12) were assessed to determine convergent validity. Among 397 patients, 221 patients were treated by transurethral resection of bladder tumor (TURBT) endoscopically, 49 patients underwent cystectomy with neobladder, and 127 patients underwent cystectomy involving stoma. The percentage of missing responses in the BIS ranged from 8.1 to 15.6%. Cronbach's α coefficient was 0.924. Higher BIS scores indicate negative body image, and the median BIS score for patients with native bladders after TURBT (0.5) was significantly lower than those of the patients with neobladder (4.0) and stoma formation (7.0), which indicated the discriminatory ability of the BIS. Each domain of the Bladder Cancer Index and the role summary score of the SF-12 correlated to the BIS scores, which confirmed the convergent validity. A range of BIS scores were identified among patients who reported similar physical summary scores and mental summary scores of the SF-12. This study confirmed the reliability and validity of the Japanese version of the BIS for bladder cancer patients.

COVID-19-related stress, exercise, and oral health-related quality of life among community-dwelling older adults who participated in the CHEER Iwamizawa project, Japan.
Kazuhito Miura, Yutaka Watanabe, Haruhisa Baba, Kimiya Ozaki, Takae Matsushita, Miyako Kondoh, Kazutaka Okada, Shinji Nakaoka, Katsuhiko Ogasawara, Teppei Suzuki, Hiroshi Saito, Takashi Kimura, Akiko Tamakoshi, Yutaka Yamazaki
Scientific reports, 12, 1, 20347, 20347, 27 Nov. 2022, [International Magazine]
English, Scientific journal, This study examined the association between coronavirus disease 2019 (COVID-19)-related stress, exercise habits, and oral health-related quality of life (OHRQoL) in a sample of 215 community-dwelling older adults in Japan (57 men, 158 women; Mage = 74.2 years, SD = 6.0). Data were collected during wellness checkups in October 2020 and included participants' demographic characteristics, measures of instrumental activities of daily living and depressive tendencies, number of teeth, oral hypofunction, OHRQoL, COVID-19-related stress, and exercise habits. Four mutually exclusive groups were created, using the presence or absence of COVID-19-related stress and lack of exercise habits as risk factors for poor OHRQoL (no COVID-19-related stress and no lack of exercise, COVID-19-related stress only, lack of exercise habits only, and both COVID-19-related stress and lack of exercise habits). Poisson regression with robust standard errors provided the prevalence ratio for poor OHRQoL. The presence of both COVID-19-related stress and lack of exercise habits (adjusted prevalence ratio: 2.20, 95% CI: 1.31- 3.69) was associated with poor OHRQoL. The results indicate that COVID-19-related stress and exercise habits should be considered when designing oral health and public health initiatives.

Extraction and Quantification of Words Representing Degrees of Diseases: Combining the Fuzzy C-Means Method and Gaussian Membership.
Feng Han, ZiHeng Zhang, Hongjian Zhang, Jun Nakaya, Kohsuke Kudo, Katsuhiko Ogasawara
JMIR formative research, 6, 11, e38677, 18 Nov. 2022, [International Magazine]
English, Scientific journal, BACKGROUND: Due to the development of medical data, a large amount of clinical data has been generated. These unstructured data contain substantial information. Extracting useful knowledge from this data and making scientific decisions for diagnosing and treating diseases have become increasingly necessary. Unstructured data, such as in the Marketplace for Medical Information in Intensive Care III (MIMIC-III) data set, contain several ambiguous words that demonstrate the subjectivity of doctors, such as descriptions of patient symptoms. These data could be used to further improve the accuracy of medical diagnostic system assessments. To the best of our knowledge, there is currently no method for extracting subjective words that express the extent of these symptoms (hereinafter, "degree words"). OBJECTIVE: Therefore, we propose using the fuzzy c-means (FCM) method and Gaussian membership to quantify the degree words in the clinical medical data set MIMIC-III. METHODS: First, we preprocessed the 381,091 radiology reports collected in MIMIC-III, and then we used the FCM method to extract degree words from unstructured text. Thereafter, we used the Gaussian membership method to quantify the extracted degree words, which transform the fuzzy words extracted from the medical text into computer-recognizable numbers. RESULTS: The results showed that the digitization of ambiguous words in medical texts is feasible. The words representing each degree of each disease had a range of corresponding values. Examples of membership medians were 2.971 (atelectasis), 3.121 (pneumonia), 2.899 (pneumothorax), 3.051 (pulmonary edema), and 2.435 (pulmonary embolus). Additionally, all extracted words contained the same subjective words (low, high, etc), which allows for an objective evaluation method. Furthermore, we will verify the specific impact of the quantification results of ambiguous words such as symptom words and degree words on the use of medical texts in subsequent studies. These same ambiguous words may be used as a new set of feature values to represent the disorders. CONCLUSIONS: This study proposes an innovative method for handling subjective words. We used the FCM method to extract the subjective degree words in the English-interpreted report of the MIMIC-III and then used the Gaussian functions to quantify the subjective degree words. In this method, words containing subjectivity in unstructured texts can be automatically processed and transformed into numerical ranges by digital processing. It was concluded that the digitization of ambiguous words in medical texts is feasible.

Spatial-temporal analysis of cerebral infarction mortality in Hokkaido, Japan: an ecological study using a conditional autoregressive model.
Kazuki Ohashi, Toshiya Osanai, Kensuke Fujiwara, Takumi Tanikawa, Yuji Tani, Soichiro Takamiya, Hirotaka Sato, Yasuhiro Morii, Kyohei Bando, Katsuhiko Ogasawara
International journal of health geographics, 21, 1, 16, 16, 31 Oct. 2022, [International Magazine]
English, Scientific journal, BACKGROUND: Accessibility to stroke treatments is a challenge that depends on the place of residence. However, recent advances in medical technology have improved health outcomes. Nevertheless, the geographic heterogeneity of medical resources may increase regional disparities. Therefore, evaluating spatial and temporal influences of the medical system on regional outcomes and advanced treatment of cerebral infarction are important from a health policy perspective. This spatial and temporal study aims to identify factors associated with mortality and to clarify regional disparities in cerebral infarction mortality at municipality level. METHODS: This ecological study used public data between 2010 and 2020 from municipalities in Hokkaido, Japan. We applied spatial and temporal condition autoregression analysis in a Bayesian setting, with inference based on the Markov chain Monte Carlo simulation. The response variable was the number of deaths due to cerebral infarction (ICD-10 code: I63). The explanatory variables were healthcare accessibility and socioeconomic status. RESULTS: The large number of emergency hospitals per 10,000 people (relative risk (RR) = 0.906, credible interval (Cr) = 0.861 to 0.954) was associated with low mortality. On the other hand, the large number of general hospitals per 10,000 people (RR = 1.123, Cr = 1.068 to 1.178) and longer distance to primary stroke centers (RR = 1.064, Cr = 1.014 to 1.110) were associated with high mortality. The standardized mortality ratio decreased from 2010 to 2020 in Hokkaido by approximately 44%. Regional disparity in mortality remained at the same level from 2010 to 2015, after which it narrowed by approximately 5% to 2020. After mapping, we identified municipalities with high mortality rates that emerged in Hokkaido's central and northeastern parts. CONCLUSION: Cerebral infarction mortality rates and the disparity in Hokkaido improved during the study period (2010-2020). This study emphasized that healthcare accessibility through places such as emergency hospitals and primary stroke centers was important in determining cerebral infarction mortality at the municipality level. In addition, this study identified municipalities with high mortality rates that require healthcare policy changes. The impact of socioeconomic factors on stroke is a global challenge, and improving access to healthcare may reduce disparities in outcomes.

Effects of colour narrative in community-dwelling older adults: A mixed methods study.
Risa Takashima, Takao Inoue, Yuko Yoshida, Mari Sakaue, Teppei Suzuki, Katsuhiko Ogasawara
Scandinavian journal of occupational therapy, 29, 7, 542, 554, Oct. 2022, [Peer-reviewed], [International Magazine]
English, Scientific journal, BACKGROUND: Based on occupational storytelling/story-making, this study developed Colour Narrative, a program to promote the health and well-being of community-dwelling older adults. OBJECTIVES: To conduct a pilot study to implement Colour Narrative in a heavy snowfall area of Japan and verify the participants' experiences in the program and its effectiveness. MATERIAL AND METHODS: An advanced mixed methods design was used. The participants were 22 members of a community-based social group for older adults. Quantitative measurements of life functions and health-related quality of life (HRQOL) were conducted before and after the intervention. Qualitative data were collected from focus group interviews regarding the participants' experiences during the intervention process. Lastly, both datasets were integrated. RESULTS: The harsh living conditions due to heavy snowfall reduced the participants' overall activity. In this environment, Colour Narrative encouraged them to control their lives more in their own ways and enhanced their HRQOL. The core of their experiences was 'negotiating occupations'. This negotiation was a highly intellectual task that significantly improved their cognitive function. CONCLUSIONS: The structure and content of Colour Narrative were found to be useful and feasible for community-dwelling older adults. SIGNIFICANCE: Colour Narrative offers a new occupation-based intervention strategy for preventive occupational therapy.

Potential crowdedness of mechanical thrombectomy and cerebral infarction mortality in Japan: Application of inverted two-step floating catchment area method.
Kazuki Ohashi, Kensuke Fujiwara, Toshiya Osanai, Takumi Tanikawa, Kyohei Bando, Shojiro Yamasaki, Tomohiro Aoki, Songzi Gu, Katsuhiko Ogasawara
Journal of stroke and cerebrovascular diseases : the official journal of National Stroke Association, 31, 9, 106625, 106625, Sep. 2022, [International Magazine]
English, Scientific journal, OBJECTIVES: This study aimed to evaluate a stroke medical delivery system based on population coverage and the potential crowdedness index (PCI) of mechanical thrombectomy and investigate the relationship between PCI and cerebral infarction mortality in Japan. MATERIALS AND METHODS: This cross-sectional study defined 662 facilities and 1605 neurointerventionalists as supply, population aged 55 years or older as demand, and set the reachable area for demand as 120 min in driving time. Multiple regression analysis adjusted for spatial autocorrelation was used to examine the relationship between PCI and cerebral infarction mortality. RESULTS: In the 2020 data, 99% of the population aged 55 years or older had access to mechanical thrombectomy (≤120 min), and the PCI ranged from 5876 to 129838, with a median of 30426. From 2020 to 2035, the PCI is estimated to increase (30426 to 32510), decreasing after 2035 (32510 to 29469). The PCI distribution exhibited geographical heterogeneity. High PCI values emerged in eastern Japan. According to regression analysis, the increase in PCI by 1% led to an increase of 0.13% in standardized mortality ratio of cerebral infarction in men. However, PCI did not significantly correlate with cerebral infarction mortality in women. CONCLUSIONS: PCI for hospitals based on supply and demand was geographically heterogeneous in Japan. Optimization of PCI contributes equalization of mechanical thrombectomy provision system and may improve cerebral infarction mortality.

Measuring the Inequalities in the Distribution of Public Healthcare Resources by the HRDI (Health Resources Density Index): Data Analysis from 2010 to 2019.
Jieyu Zhao, Yuchen Yang, Katsuhiko Ogasawara
Healthcare (Basel, Switzerland), 10, 8, 27 Jul. 2022, [International Magazine]
English, Scientific journal, BACKGROUND: In China, a developing country, the imbalance of development exists in different fields, and the inequalities in the distribution of healthcare services have garnered increasing attention. This study aimed to assess the healthcare services allocation and compare the latest distribution ratios of the essential healthcare indicators with the national requirement values announced by the government to research the level of healthcare development in China. METHODS: Data were extracted from the Chinese Statistical Yearbook (2010-2019). The Healthcare Resource Density Index (HRDI) was used to evaluate equity in the demographic and geographical dimensions. The requirement values related to the ratio of doctors, nurses, and institution beds per thousand people were drawn from government documents. The data of healthcare serviceability indicators were compared with those requirements to check the situation of each province's medical development. RESULTS: From 2010 to 2018, there was a sustainable upward trend in government investment, however, a noticeable drop in the investment in northeast areas was seen. Although the HRDI of the institutions, beds, doctors, and nurses experienced some small fluctuations over the years, the developing areas in the middle-west areas had almost approached the level of developed east areas. There were only four provinces that met the requirements of the government in all three indicators (the ratio of institution beds, doctors, and nurses per thousand people). CONCLUSION: The equality of the distribution of healthcare services in China was unfair between the eastern and middle-western areas. The government launched the developing requirements and paid additional attention to narrowing the imbalance among different economic level regions to meet the needs of the local people. Although many provinces did not meet the requirements for medical resources in 2019, the distribution of healthcare services was approached relatively equitably countrywide.

Analysis of Factors Hindering the Dissemination of Medical Information Standards.
Masami Mukai, Katsuhiko Ogasawara
Healthcare (Basel, Switzerland), 10, 7, 04 Jul. 2022, [International Magazine]
English, Scientific journal, Many medical information standards are not widely used in Japan, and this hinders the promotion of the use of real-world data. However, the complex intertwining of many factors hindering the dissemination of medical information standards makes it difficult to solve this problem. This study analyzed and visualized relationships among factors that inhibit the dissemination of medical information standards. Five medical informatics experts affiliated with universities and hospitals were interviewed about the factors that hinder the dissemination of medical information standards in Japan. The presented factors were analyzed using the interpretive structural modeling (ISM) method and the decision-making trial and evaluation laboratory (DEMATEL) method. We found that "legislation" and "reliability" were important inhibiting factors for the dissemination of medical information standards in Japan. We also found a six-layered structure in which "reliability" was satisfied when "legislation" was in place and "expectations" and "personal information" were resolved. The DEMATEL analysis indicated the relationships and classifications of factors hindering the dissemination of medical information standards. Since the adoption of medical information standards does not directly lead to revenue for medical institutions, it is possible to meet the "expectation" of improving the quality of medical care by ensuring "legislation" and "reliability", that is, ensuring the dependability of medical treatment. The results of this study visually show the structure of the factors and will help solve the problems that hinder the effective and efficient spread of standards. Solving these problems may support the efficient use of real-world data.

DPC(Diagnosis Procedure Combination/Per-Diem Payment System)データを用いた腹腔鏡下膀胱全摘除術における周術期合併症治療費用の分析
森井 康博, 原林 透, 大澤 崇宏, 谷川 琢海, 山品 博子, 篠原 信雄, 小笠原 克彦
泌尿器外科, 35, 6, 516, 521, 医学図書出版(株), Jun. 2022
Japanese

Differences in spatial patterns of long-term care depending on severity in Hokkaido, Japan.
Kazuki Ohashi, Kensuke Fujiwara, Takumi Tanikawa, Kyohei Bando, Tomohiro Aoki, Katsuhiko Ogasawara
Geospatial health, 17, 1, 16 May 2022, [Last author, Corresponding author], [International Magazine]
English, Scientific journal, The increasing demand for long-term care (LTC) among the ageing population is a serious problem worldwide, which has greatly increased also in Japan since the introduction of the LTC insurance system there. Since there is a difference between insurers with respect to the proportion of people needing LTC, this study aimed at clarifying the spatial patterns of LTC. Insurer (n=156) LTC data for the period 2012-2019 were obtained from Ministry of Health, Labour, and Welfare and those needing LTC were classified into three classes: total, mild and severe with ageand sex-adjusted proportions needing LTC. Global and local Moran’s I statistics were calculated for each 2-year period to clarify the trends of global and local spatial clusters. From 2012 to 2019, the mean proportion of mild class cases increased (10.6% to 11.6%), whereas that of severe class cases decreased slightly (5.9% to 5.7%). The spatial pattern of the proportion of each class revealed positive spatial autocorrelation. Based on analysis by local Moran’s I, differences in spatial patterns were emphasised between the mild and severe classes. In Hokkaido, High-High clusters of mild cases were identified in the central and southern parts and severe ones in the northern and southern parts. Spatial patterns differed depending on the LTC class. Some insurers had distinctly higher or lower certification rates than those of their neighbourhoods.

Acceptance of the Use of Artificial Intelligence in Medicine Among Japan's Doctors and the Public: A Questionnaire Survey.
Honoka Tamori, Hiroko Yamashina, Masami Mukai, Yasuhiro Morii, Teppei Suzuki, Katsuhiko Ogasawara
JMIR human factors, 9, 1, e24680, 16 Mar. 2022, [International Magazine]
English, Scientific journal, BACKGROUND: The use of artificial intelligence (AI) in the medical industry promises many benefits, so AI has been introduced to medical practice primarily in developed countries. In Japan, the government is preparing for the rollout of AI in the medical industry. This rollout depends on doctors and the public accepting the technology. Therefore it is necessary to consider acceptance among doctors and among the public. However, little is known about the acceptance of AI in medicine in Japan. OBJECTIVE: This study aimed to obtain detailed data on the acceptance of AI in medicine by comparing the acceptance among Japanese doctors with that among the Japanese public. METHODS: We conducted an online survey, and the responses of doctors and members of the public were compared. AI in medicine was defined as the use of AI to determine diagnosis and treatment without requiring a doctor. A questionnaire was prepared referred to as the unified theory of acceptance and use of technology, a model of behavior toward new technologies. It comprises 20 items, and each item was rated on a five-point scale. Using this questionnaire, we conducted an online survey in 2018 among 399 doctors and 600 members of the public. The sample-wide responses were analyzed, and then the responses of the doctors were compared with those of the public using t tests. RESULTS: Regarding the sample-wide responses (N=999), 653 (65.4%) of the respondents believed, in the future, AI in medicine would be necessary, whereas only 447 (44.7%) expressed an intention to use AI-driven medicine. Additionally, 730 (73.1%) believed that regulatory legislation was necessary, and 734 (73.5%) were concerned about where accountability lies. Regarding the comparison between doctors and the public, doctors (mean 3.43, SD 1.00) were more likely than members of the public (mean 3.23, SD 0.92) to express intention to use AI-driven medicine (P<.001), suggesting that optimism about AI in medicine is greater among doctors compared to the public. CONCLUSIONS: Many of the respondents were optimistic about the role of AI in medicine. However, when asked whether they would like to use AI-driven medicine, they tended to give a negative response. This trend suggests that concerns about the lack of regulation and about accountability hindered acceptance. Additionally, the results revealed that doctors were more enthusiastic than members of the public regarding AI-driven medicine. For the successful implementation of AI in medicine, it would be necessary to inform the public and doctors about the relevant laws and to take measures to remove their concerns about them.

Development of a Model for the Spread of Nosocomial Infection Outbreaks Using COVID-19 Data.
Ryuichiro Ueda, Ayato Goto, Ryuki Kita, Katsuhiko Ogasawara
Healthcare (Basel, Switzerland), 10, 3, 03 Mar. 2022, [International Magazine]
English, Scientific journal, We constructed and validated a mathematical model of infectious diseases to simulate the impact of COVID-19 nosocomial infection outbreaks outside hospitals. The model was constructed with two populations, one inside the hospital and one outside the hospital, and a population diffusion rate k (0 ≤ k ≤ 1) was set as a parameter to simulate the flow of people inside the hospital to outside the hospital. To validate the model, we divided the values of the population diffusion rate k into k = 0-0.25, 0.25-0.50, 0.50-0.75, and 0.75-1.0, and the initial value at the beginning of the simulation was set as day 1. The number of infected people was calculated for a 60-day period. The change in the number of people infected outside the hospital due to the out-break of nosocomial infection was calculated. As a result of the simulation, the number of people infected outside the hospital increased as the population diffusion rate k increased from 0.50 to 0.75, but the number of people infected from 0.75 to 1.0 was almost the same as that from 0 to 0.25, with the peak day being earlier. In future, it will be necessary to examine epidemiological information that has a large impact on the results.

Oral frailty and carriage of oral Candida in community-dwelling older adults (Check-up to discover Health with Energy for senior Residents in Iwamizawa; CHEER Iwamizawa).
Haruhisa Baba, Yutaka Watanabe, Kazuhito Miura, Kimiya Ozaki, Takae Matsushita, Miyako Kondoh, Kazutaka Okada, Akira Hasebe, Tokiyoshi Ayabe, Kiminori Nakamura, Shinji Nakaoka, Katsuhiko Ogasawara, Teppei Suzuki, Hiroshi Saito, Takashi Kimura, Akiko Tamakoshi, Yutaka Yamazaki
Gerodontology, 39, 1, 49, 58, Mar. 2022, [International Magazine]
English, Scientific journal, OBJECTIVE: To examine the association between oral frailty and oral Candida carriage as a general indicator of deteriorating oral function in older adults. BACKGROUND: Older adults exhibit an elevated risk of oral candidiasis caused by Candida. Although many studies have identified factors associated with oral Candida carriage, none have evaluated its relationship with oral function. MATERIALS AND METHODS: This study included 210 community-dwelling older adults aged ≥60 years who participated in wellness checks. Fungal flora expression in saliva samples was evaluated to identify oral C. albicans and C. glabrata. Participants were categorised by detection of neither strain (group 1), either one of the strains (group 2), or both strains (group 3). The relationship between oral Candida carriage and oral frailty was evaluated by multinomial logistic regression analysis. RESULTS: The participants included 58 men and 152 women with a mean age of 74.2 ± 6.1 years. A total of 88 (41.9%), 94 (44.8%) and 28 (13.3%) participants were assigned to groups 1, 2 and 3 respectively. In the multinomial logistic regression analysis, significant associations were observed between group 1 and group 2 for "Have you choked on your tea or soup recently?" and the number of applicable oral frailty items. Between group 1 and group 3, significant associations were observed for the number of remaining teeth, masticatory performance and the number of applicable oral frailty items. CONCLUSION: We obtained basic data useful for intervention studies aimed at verifying whether oral function management prevents deterioration of the oral bacterial flora.

Recurrent Education Related to Hospital Management : A Survey of the Hospital Management Administrator Program at Hokkaido University
Tomohiro Aoki, Yasuhiro Morii, Nozomi Shiina, Tomoki Ishikawa, Teppei Suzuki, Kensuke Fujiwara, Yuji Tani, Katsuhiko Ogasawara
J.Higher Education and Life long Learning, 29, Mar. 2022, [Peer-reviewed]
Scientific journal

Examining the Effect of the Ratio of Biomedical Domain to General Domain Data in Corpus in Biomedical Literature Mining
Ziheng Zhang, Feng Han, Hongjian Zhang, Tomohiro Aoki, Katsuhiko Ogasawara
Applied Sciences, 12, 1, 154, 154, MDPI AG, 24 Dec. 2021, [Last author, Corresponding author]
Scientific journal, Biomedical terms extracted using Word2vec, the most popular word embedding model in recent years, serve as the foundation for various natural language processing (NLP) applications, such as biomedical information retrieval, relation extraction, and recommendation systems. The objective of this study is to examine how changes in the ratio of the biomedical domain to general domain data in the corpus affect the extraction of similar biomedical terms using Word2vec. We downloaded abstracts of 214,892 articles from PubMed Central (PMC) and the 3.9 GB Billion Word (BW) benchmark corpus from the computer science community. The datasets were preprocessed and grouped into 11 corpora based on the ratio of BW to PMC, ranging from 0:10 to 10:0, and then Word2vec models were trained on these corpora. The cosine similarities between the biomedical terms obtained from the Word2vec models were then compared in each model. The results indicated that the models trained with both BW and PMC data outperformed the model trained only with medical data. The similarity between the biomedical terms extracted by the Word2vec model increased when the ratio of the biomedical domain to general domain data was 3:7 to 5:5. This study allows NLP researchers to apply Word2vec based on more information and increase the similarity of extracted biomedical terms to improve their effectiveness in NLP applications, such as biomedical information extraction.

Developing a RadLex-Based Named Entity Recognition Tool for Mining Textual Radiology Reports: Development and Performance Evaluation Study.
Shintaro Tsuji, Andrew Wen, Naoki Takahashi, Hongjian Zhang, Katsuhiko Ogasawara, Gouqian Jiang
Journal of medical Internet research, 23, 10, e25378, 29 Oct. 2021, [International Magazine]
English, Scientific journal, BACKGROUND: Named entity recognition (NER) plays an important role in extracting the features of descriptions such as the name and location of a disease for mining free-text radiology reports. However, the performance of existing NER tools is limited because the number of entities that can be extracted depends on the dictionary lookup. In particular, the recognition of compound terms is very complicated because of the variety of patterns. OBJECTIVE: The aim of this study is to develop and evaluate an NER tool concerned with compound terms using RadLex for mining free-text radiology reports. METHODS: We leveraged the clinical Text Analysis and Knowledge Extraction System (cTAKES) to develop customized pipelines using both RadLex and SentiWordNet (a general purpose dictionary). We manually annotated 400 radiology reports for compound terms in noun phrases and used them as the gold standard for performance evaluation (precision, recall, and F-measure). In addition, we created a compound terms-enhanced dictionary (CtED) by analyzing false negatives and false positives and applied it to another 100 radiology reports for validation. We also evaluated the stem terms of compound terms by defining two measures: occurrence ratio (OR) and matching ratio (MR). RESULTS: The F-measure of cTAKES+RadLex+general purpose dictionary was 30.9% (precision 73.3% and recall 19.6%) and that of the combined CtED was 63.1% (precision 82.8% and recall 51%). The OR indicated that the stem terms of effusion, node, tube, and disease were used frequently, but it still lacks capturing compound terms. The MR showed that 71.85% (9411/13,098) of the stem terms matched with that of the ontologies, and RadLex improved approximately 22% of the MR from the cTAKES default dictionary. The OR and MR revealed that the characteristics of stem terms would have the potential to help generate synonymous phrases using the ontologies. CONCLUSIONS: We developed a RadLex-based customized pipeline for parsing radiology reports and demonstrated that CtED and stem term analysis has the potential to improve dictionary-based NER performance with regard to expanding vocabularies.

Cost-effectiveness analysis using lifetime attributable risk of proton beam therapy for pediatric medulloblastoma in Japan.
Takaaki Yoshimura, Honoka Tamori, Yasuhiro Morii, Takayuki Hashimoto, Shinichi Shimizu, Katsuhiko Ogasawara
Journal of radiation research, 29 Sep. 2021, [Peer-reviewed], [International Magazine]
English, Scientific journal, Compared to conventional X-ray therapy, proton beam therapy (PBT) has more clinical and physical advantages such as irradiation dose reduction to normal tissues for pediatric medulloblastoma. However, PBT is expensive. We aimed to compare the cost-effectiveness of PBT for pediatric medulloblastoma with that of conventional X-ray therapy, while focusing on radiation-induced secondary cancers, which are rare, serious and negatively affect a patient's quality of life (QOL). Based on a systematic review, a decision tree model was used for the cost-effectiveness analysis. This analysis was performed from the perspective of health care payers; the cost was estimated from medical fees. The target population was pediatric patients with medulloblastoma below 14 years old. The time horizon was set at 7.7 years after medulloblastoma treatment. The primary outcome was the incremental cost-effectiveness ratio (ICER), which was defined as the ratio of the difference in cost and lifetime attributable risk (LAR) between conventional X-ray therapy and PBT. The discount rate was set at 2% annually. Sensitivity analyses were performed to model uncertainty. Cost and LAR in conventional X-ray therapy and PBT were Japanese yen (JPY) 1 067 608 and JPY 2436061 and 42% and 7%, respectively. The ICER was JPY 3856398/LAR. In conclusion, PBT is more cost-effective than conventional X-ray therapy in reducing the risk of radiation-induced secondary cancers in pediatric medulloblastoma. Thus, our constructed ICER using LAR is one of the valid indicators for cost-effectiveness analysis in radiation-induced secondary cancer.

Analyzing Cost-Effectiveness of Allocating Neurointerventionist for Drive and Retrieve System for Patients with Acute Ischemic Stroke.
Yasuhiro Morii, Toshiya Osanai, Kensuke Fujiwara, Takumi Tanikawa, Kiyohiro Houkin, Songzi Gu, Katsuhiko Ogasawara
Journal of stroke and cerebrovascular diseases : the official journal of National Stroke Association, 30, 8, 105843, 105843, Aug. 2021, [Last author, Corresponding author], [International Magazine]
English, Scientific journal, OBJECTIVES: There are regional disparities in implementation rates of endovascular thrombectomy due to time and resource constraints such as endovascular thrombectomy specialists. In Hokkaido, Japan, Drive and Retrieve System (DRS), where endovascular thrombectomy specialists perform early endovascular thrombectomies by traveling from the facilities where they normally work to facilities closer to the patient. This study analyzed the cost-effectiveness of allocating a endovascular thrombectomy specialist for DRS to treat stroke patients. MATERIALS AND METHODS: he number of ischemic stroke patients expected to receive endovascular thrombectomy in Hokkaido in 2015 was estimated. It was assumed that an additional neutointerventionist was allocated for DRS. The analysis was performed from the government's perspective, which includes medical and nursing-care costs, and the personnel cost for endovascular thrombectomy specialist. The analysis was conducted comparing the current scenario, where patients received endovascular thrombectomy in facilities where endovascular thrombectomy specialists normally work, with the scenario with DRS within 60 min drive distance. Patient transport time was analyzed using geographic information system, and patient severity was estimated from the transport time. The primary outcome was incremental cost-effectiveness ratio (ICER) in each medical area which was calculated from the incremental costs and the incremental quality-adjusted life years (QALYs), estimated from patient severity using published literature. The entire process was repeated 100 times. RESULTS: DRS was most cost-effective in Kamikawachubu area, where the ICER was $14,173±16,802/QALY, significantly lower than the threshold that the Japanese guideline suggested. CONCLUSIONS: Since DRS was cost-effective in Kamikawachubu area, the area should be prioritized when a endovascular thrombectomy specialist for DRS is allocated as a policy.

The Effects of Static Stretching On Dynamic Postural Control During Maximum Forward Leaning Task.
Kensuke Oba, Moeka Ohta, Hiroki Mani, Teppei Suzuki, Katsuhiko Ogasawara, Mina Samukawa
Journal of motor behavior, 1, 9, 21 Jun. 2021, [International Magazine]
English, Scientific journal, The purpose of this study was to determine how the application of static stretching to ankle plantar flexors affects postural control during maximum forward leaning. Twenty-six volunteer males (age 21.4 ± 1.2 years) were randomly assigned to stretching and control conditions. Participants conducted 5-min stretching on a stretch board for the stretching condition and were kept standing for 6-min for the control condition. Before and after intervention, the range of motion (ROM) at ankle dorsiflexion and the center of pressure (COP) excursion during maximal forward leaning were determined. Mean anteroposterior COP position, COP velocity and COP areas were calculated to compare the change in postural control. After stretching, ROM was significantly increased. During maximal forward leaning after stretching, both COP position and velocity showed significant increases compared to before stretching. Moreover, COP position and velocity in the stretching condition were significantly higher than in the control condition after stretching. No significant differences were found in COP area before and after stretching. Five-minute stretching increased not only ROM but also the anterior limit of stability while maintaining posture and led to faster COP shift than before stretching. These results indicate that static stretching would improve dynamic postural control as well.

【COVID-19が流行しない社会を目指す-社会医学・環境衛生学の視点から】環境健康科学の立場からその研究と教育の現状と課題
荒木 敦子, 宮下 ちひろ, 岸 玲子, 小笠原 克彦
公衆衛生, 85, 6, 400, 407, (株)医学書院, Jun. 2021
Japanese

Analysis of Factors Inhibiting the Dissemination of Telemedicine in Japan: Using the Interpretive Structural Modeling.
Hiroki Shimizu, Takumi Tanikawa, Hiro Mizuguchi, Yuji Tani, Katsuhiko Ogasawara
Telemedicine journal and e-health : the official journal of the American Telemedicine Association, 27, 5, 575, 582, May 2021, [International Magazine]
English, Scientific journal, Background: Telemedicine is not significantly spreading globally and large variations in its availability and use exist internationally. Although many factors already inhibit the dissemination of telemedicine, its complexly intertwined factors make it more difficult to solve this problem. This study aimed to analyze and visualize relationships among factors inhibiting the dissemination of telemedicine. We applied the interpretive structural modeling method and cross-impact matrix multiplication applied to classification analysis. Materials and Methods: Factors inhibiting the dissemination of telemedicine in Japan were extracted by literature review and hearing from four medical informatics experts belonging to a university or hospital using the Kawakita Jiro method. Results: Eighteen factors were extracted as those inhibiting the dissemination of telemedicine service in Japan: initial and operation cost, research data, legal development, profitability, usability, human resources, image quality, network speed, information security, technical limitation, restriction for clinical practice, practice continuity, target use case, burden for physicians, respondence, risks for clinical safety, understanding of medical staff, and understanding of patients. The hierarchical structure chart showed a nine-level structure and the cross-impact matrix showed the relationship among factors and the classification of them inhibiting the dissemination of telemedicine. Discussion: We found that the underlying factors were high implementation and operation costs, low research data, and risks for clinical safety. Implementation and operation costs, research data, legal development, and profitability have high driving power; thus, it is expected that the elimination of these inhibiting factors would lead to the dissemination of telemedicine. Conclusions: There are many kinds of factors inhibiting the dissemination of telemedicine in Japan. The result of this showed the structure of these factors visually and could be useful to solve the problem inhibiting the dissemination of telemedicine effectively and efficiently.

診療放射線技師の地理的分布均一性の維持に向けた学生への就職選好調査
谷川原 綾子, 藤原 健祐, 井上 剛, 北川 剛, 木村 徹, 渡邊 良晴, 小笠原 克彦
日本放射線技術学会雑誌, 77, 4, 319, 325, (公社)日本放射線技術学会, Apr. 2021
Japanese

Mediating Factors Between Parental Socioeconomic Status and Small for Gestational Age in Infants: Results from the Hokkaido Study on Environment and Children’s Health
Naomi Tamura, Tomoyuki Hanaoka, Kumiko Ito, Atsuko Araki, Chihiro Miyashita, Sachiko Ito, Sumitaka Kobayashi, Yoichi Ito, Hisanori Minakami, Kazutoshi Cho, Toshiaki Endo, Tsuyoshi Baba, Kazuo Sengoku, Toshinobu Miyamoto, Katsuhiko Ogasawara, Reiko Kishi
Maternal and Child Health Journal, 25, 4, 645, 655, Springer Science and Business Media LLC, Apr. 2021, [International Magazine]
English, Scientific journal, OBJECTIVES: Previous studies indicated a significant association between small for gestational age (SGA) in infants and their parents' socioeconomic status (SES). Thus, this study aimed to examine if parental factors, such as maternal smoking, and the pre-pregnancy body mass index (BMI) could mediate the associations between parental SES and SGA. METHODS: The participants of this study were pregnant women who enrolled in an ongoing birth cohort study, the Hokkaido study, during the first trimester of their pregnancies. A total of 14,593 live singleton births were included in the statistical analysis, of which 1011 (6.9%) were SGA. Two structural equation models were employed to evaluate the associations between parental SES, parental characteristics, and SGA. RESULTS: The effect of low SES on SGA was directly mediated by maternal pre-pregnancy BMI, smoking during the third trimester, and alcohol consumption during the first trimester in the first model, which was based the assumption of independent associations between mediating factors. In the second model, which additionally considered the mediating factors from the first model, smoking during pregnancy mediated decline in parental SES, consequently increased SGA. Moreover, an increase in pregnancy smoking status increased the prevalence of lower maternal pre-pregnancy BMI and its effect on SGA. CONCLUSIONS FOR PRACTICE: In this study, we observed the independent mediating effect of maternal pre-pregnancy BMI, smoking, and alcohol consumption during pregnancy on low SES and, consequently, SGA, with the additional mediating pathway of SES to smoking to low BMI on SGA.

Job satisfaction of female radiological technologists: Factor analysis using Quantification Theory Type II
Yuji Tani, Akane Kishiume, Teppei Suzuki, Manami Karino, Tomoki Ishikawa, Katsuhiko Ogasawara
Research Square Platform LLC, 17 Mar. 2021
Abstract

Background: Recently, there has been an increased demand for female radiological technologists (hereinafter referred to as female technologists) due to the spread of mammography, but there have been no previous studies on the job satisfaction of female technologists. In this study, we attempted to extract factors that affect the job satisfaction of female technologists to identify factors in the working environment that make it easy for female technologists to work. Methods: In this study, the results of a questionnaire survey of 287 female technologists in Hokkaido, conducted by the Hokkaido Radiological Technologist Organization “Furattokai”, were analyzed using Quantification Theory Type II. The factors considered were years of experience, number of duty shifts, number of technologists, male-female gender gap, number of job changes, sexual harassment, overtime, and paid holiday usage rate. Results: The results revealed that in addition to work environments where female technologists can work for a long time, the work content and relationships with male technologists, including sexual harassment, affected the job satisfaction of female technologists.Conclusions:This study extracted factors that affected the job satisfaction of female technologists as basic data for creating a working environment that makes it easier for female technologists to continue working for a long period of time, as the demand for female technologists is expected to increase in the future. The factors that strongly correlated with job satisfaction were not specific to women, as they are also common to men, including “years of experience” and “number of shifts on duty”.

A Bayesian Network-Based Browsing Model for Patients Seeking Radiology-Related Information on Hospital Websites: Development and Usability Study.
Ryusuke Suzuki, Teppei Suzuki, Shintaro Tsuji, Kensuke Fujiwara, Hiroko Yamashina, Akira Endoh, Katsuhiko Ogasawara
Journal of medical Internet research, 23, 1, e14794, 19 Jan. 2021, [International Magazine]
English, Scientific journal, BACKGROUND: An increasing number of people are visiting hospital websites to seek better services and treatments compared to the past. It is therefore important for hospitals to develop websites to meet the needs of their patients. However, few studies have investigated whether and how the current hospital websites meet the patient's needs. Above all, in radiation departments, it may be difficult for patients to obtain the desired information regarding modality and diagnosis because such information is subdivided when described on a website. OBJECTIVE: The purpose of this study is to suggest a hospital website search behavior model by analyzing the browsing behavior model using a Bayesian network from the perspective of one-to-one marketing. METHODS: First, we followed the website access log of Hokkaido University Hospital, which was collected from September 1, 2016, to August 31, 2017, and analyzed the access log using Google Analytics. Second, we specified the access records related to radiology from visitor browsing pages and keywords. Third, using these resources, we structured 3 Bayesian network models based on specific patient needs: radiotherapy, nuclear medicine examination, and radiological diagnosis. Analyzing each model, this study considered why some visitors could not reach their desired page and improvements to meet the needs of visitors seeking radiology-related information. RESULTS: The radiotherapy model showed that 74% (67/90) of the target visitors could reach their requested page, but only 2% (2/90) could reach the Center page where inspection information, one of their requested pages, is posted. By analyzing the behavior of the visitors, we clarified that connecting with the radiotherapy and radiological diagnosis pages is useful for increasing the proportion of patients reaching their requested page. CONCLUSIONS: We proposed solutions for patient web-browsing accessibility based on a Bayesian network. Further analysis is necessary to verify the accuracy of the proposed model in comparison to other models. It is expected that information provided on hospital websites will be improved using this method.

Comparison of Health-Related Quality of Life Between Japanese and American Patients with Bladder Cancer as Measured by a Newly Developed Japanese Version of the Bladder Cancer Index
Takahiro Osawa, John T. Wei, Takashige Abe, Michitaka Honda, Karl T. Rew, Rod Dunn, Shuhei Yamada, Jun Furumido, Hiroshi Kikuchi, Ryuji Matsumoto, Yasuyuki Sato, Toni Harabayashi, Norikata Takada, Keita Minami, Ken Morita, Akira Kashiwagi, Shunichi Fukuhara, Sachiyo Murai, Yoichi M. Ito, Katsuhiko Ogasawara, Nobuo Shinohara
BLADDER CANCER, 7, 1, 61, 69, 2021
English, Scientific journal

Development of Healthcare-related Recurrent Education at University:─Examples of Otaru University of Commerce Business School─
FUJIWARA Kensuke, SUZUKI Teppei, SHIINA Nozomi, AOKI Tomohiro, OGASAWARA Katsuhiko
Journal of the Japan Society for Intellectual Production, 17, 2, 2_76, 2_90, Japan Society for Intellectual Production, 2021
Japanese,

In recent years, the social needs for re-education of working adults (recurrent education) at higher education institutions have been increasing in anticipation of the 100-year life and the progress of technological innovation. The aim of this paper is to contribute to the creation of various recurrent education programs and the content and operation of existing programs through the introduction of cases related healthcare recurrent education at Otaru University of Commerce Business School (OBS). In the healthcare field, there is a need for staffs who not only have knowledge and skills, specialized in medical and nursing care services, but also have a multifaceted perspective, including knowledge of business administration and management. OBS promotes human resource development and business ecosystem building through offering special topics that positioned a regular course and certificate programs as recurrent education programs for working adults.

Trend of Gini coefficient of healthcare resources in China from 1998 to 2016
Yuchen Yang, Yasuhiro Morii, Kensuke Fujiwara, Tomoki Ishikawa, Hiroko Yamashina, Teppei Suzuki, Jun Nakaya, Katsuhiko Ogasawara
Journal of Hospital Management and Health Policy, 5, 40, 40, AME Publishing Company, Jan. 2021
Scientific journal

Health-related quality of life in Japanese patients with bladder cancer measured by a newly developed Japanese version of the Bladder Cancer Index.
Takahiro Osawa, John T Wei, Takashige Abe, Michitaka Honda, Shuhei Yamada, Jun Furumido, Hiroshi Kikuchi, Ryuji Matsumoto, Kazushi Hirakawa, Yasuyuki Sato, Yoshihiro Sasaki, Toru Harabayashi, Norikata Takada, Keita Minami, Hiroshi Tanaka, Ken Morita, Akira Kashiwagi, Naoto Miyajima, Tomoshige Akino, Sachiyo Murai, Yoichi M Ito, Shunichi Fukuhara, Katsuhiko Ogasawara, Nobuo Shinohara
International journal of clinical oncology, 25, 12, 2090, 2098, Dec. 2020, [Domestic magazines]
English, Scientific journal, INTRODUCTION: We validated a Japanese version of the Bladder Cancer Index (BCI) as a tool for measuring health-related quality of life (HRQOL) in bladder cancer patients treated with various surgical procedures. METHODS: The reliability and validity of the Japanese BCI were examined in 397 Japanese patients with bladder cancer via cross-sectional analysis. The patients simultaneously completed the Short Form (SF)-12, EQ-5D, and the Functional Assessment of Cancer Therapy-General and Bladder (FACT-G and FACT-BL). The differences in BCI subscales among various treatment groups were analyzed. RESULTS: This study involved 397 patients (301 males and 96 females), with a mean age of 70 years and a median disease duration of 29 months (IQR: 12-66 months). Of these patients, 221 underwent transurethral resection of a bladder tumor, and 176 patients underwent radical cystectomy (ileal conduit: 101 patients, ileal neobladder: 49, and ureterostomy: 26). Cronbach's alpha coefficient was ≥ 0.78 for all subscales, except the bowel bother subscale. Despite moderate correlations being detected between the function and bother score in urinary and bowel domains, the sexual function score was inversely correlated with the sexual bother score (r = - 0.19). A missing value percentage of > 15% was associated with old age (p < 0.05). The mean domain scores differed significantly among distinct clinically relevant treatment groups. CONCLUSIONS: Although revisions are needed to make it easier for elderly patients to comprehend, we confirmed the reliability and validity of the Japanese BCI. The Japanese BCI could be used for cross-cultural assessments of HRQOL in bladder cancer patients.

Projecting supply and demand for pharmacists in pharmacies based on the number of prescriptions and system dynamics modeling.
Yasuhiro Morii, Seiichi Furuta, Tomoki Ishikawa, Kensuke Fujiwara, Hiroko Yamashina, Katsuhiko Ogasawara
Human resources for health, 18, 1, 85, 85, 05 Nov. 2020, [International Magazine]
English, Scientific journal, BACKGROUND: Pharmacists play an important role in promoting people's health in Japan, which has an aging population. Hence, it is necessary that the distribution of pharmacists meets the population's needs in each region. This study projects the future supply and demand for pharmacists in pharmacies to consider an optimal distribution of pharmacists. METHODS: The future supply of pharmacists working in pharmacies in Hokkaido is projected using system dynamics modeling, according to their career path. The demand is projected based on the number of prescriptions, sourced from publicly available sources. The analysis period is 2015-2040. The estimated demand is converted into the number of pharmacists and the sufficiency is evaluated using sufficiency ratio (supply/demand ratio). Sensitivity analyses of the sufficiency ratio were conducted to estimate the effects of changes in parameters such as national exam pass rate, enrollments, attrition rates, the number of prescriptions per pharmacist, and diffusion of newly licensed pharmacists. RESULTS: The projected supply, in 2025 and 2040, is 1.24 and 1.56 times, respectively, as that in 2015 and the demand is 1.11 and 0.98 times, respectively. In 2015, although the sufficiency ratio in Hokkaido overall is 1.19, the ratios are higher in urban medical areas and lower than 1 in rural medical areas, such as Minamihiyama, Emmon, and Nemuro. By 2040, the sufficiency ratios are greater than 1 for all areas except for Emmon and higher than 2 in some areas. The sensitivity analyses found that the sufficiency ratio was most sensitive to diffusion of newly licensed pharmacists and the number of prescriptions per pharmacist. CONCLUSION: Optimal distribution should be considered, as the results reveal a possible shortage in the number of pharmacists in rural medical areas in 2015-2025. Conversely, as the demand is projected to decrease after 2025 with a population decrease, future supply should be determined in order not to cause an oversupply after 2025. Refinements of the projection model should be conducted since the related factors such as the roles of pharmacists will change over time.

Changing Emotions About Fukushima Related to the Fukushima Nuclear Power Station Accident-How Rumors Determined People's Attitudes: Social Media Sentiment Analysis.
Shin Hasegawa, Teppei Suzuki, Ayako Yagahara, Reiko Kanda, Tatsuo Aono, Kazuaki Yajima, Katsuhiko Ogasawara
Journal of medical Internet research, 22, 9, e18662, 02 Sep. 2020, [International Magazine]
English, Scientific journal, BACKGROUND: Public interest in radiation rose after the Tokyo Electric Power Company (TEPCO) Fukushima Daiichi Nuclear Power Station accident was caused by an earthquake off the Pacific coast of Tohoku on March 11, 2011. Various reports on the accident and radiation were spread by the mass media, and people displayed their emotional reactions, which were thought to be related to information about the Fukushima accident, on Twitter, Facebook, and other social networking sites. Fears about radiation were spread as well, leading to harmful rumors about Fukushima and the refusal to test children for radiation. It is believed that identifying the process by which people emotionally responded to this information, and hence became gripped by an increased aversion to Fukushima, might be useful in risk communication when similar disasters and accidents occur in the future. There are few studies surveying how people feel about radiation in Fukushima and other regions in an unbiased form. OBJECTIVE: The purpose of this study is to identify how the feelings of local residents toward radiation changed according to Twitter. METHODS: We used approximately 19 million tweets in Japanese containing the words "radiation" (), "radioactivity" (), and "radioactive substances" () that were posted to Twitter over a 1-year period following the Fukushima nuclear accident. We used regional identifiers contained in tweets (ie, nouns, proper nouns, place names, postal codes, and telephone numbers) to categorize them according to their prefecture, and then analyzed the feelings toward those prefectures from the semantic orientation of the words contained in individual tweets (ie, positive impressions or negative impressions). RESULTS: Tweets about radiation increased soon after the earthquake and then decreased, and feelings about radiation trended positively. We determined that, on average, tweets associating Fukushima Prefecture with radiation show more positive feelings than those about other prefectures, but have trended negatively over time. We also found that as other tweets have trended positively, only bots and retweets about Fukushima Prefecture have trended negatively. CONCLUSIONS: The number of tweets about radiation has decreased overall, and feelings about radiation have trended positively. However, the fact that tweets about Fukushima Prefecture trended negatively, despite decreasing in percentage, suggests that negative feelings toward Fukushima Prefecture have become more extreme. We found that while the bots and retweets that were not about Fukushima Prefecture gradually trended toward positive feelings, the bots and retweets about Fukushima Prefecture trended toward negative feelings.

Characteristics of type-2 diabetics who are prone to high-cost medical care expenses by Bayesian network
Yuji Sase, Daiki Kumagai, Teppei Suzuki, Hiroko Yamashina, Yuji Tani, Kensuke Fujiwara, Takumi Tanikawa, Hisashi Enomoto, Takeshi Aoyama, Wataru Nagai, Katsuhiko Ogasawara
International Journal of Environmental Research and Public Health, 17, 15, 1, 10, 01 Aug. 2020, [International Magazine]
English, Scientific journal

Association between Physical Activity Levels and Body Composition among Healthy Older Japanese Adults during a Snowy Winter: A Cross-Sectional Study.
Tomoko Shimoda, Teppei Suzuki, Kaori Tsutsumi, Mina Samukawa, Sadako Yoshimura, Katsuhiko Ogasawara
International journal of environmental research and public health, 17, 15, 23 Jul. 2020, [International Magazine]
English, Scientific journal, BACKGROUND: Despite a long average lifespan, increased life expectancy does not guarantee higher quality of life. METHODS: To contribute in understanding some determinants of healthy life expectancies in older Japanese individuals in a snowy winter region, we investigated the indicators of health. Local residents (n = 124) in the city of Iwamizawa volunteered for health examinations from January 2016 to March 2016. We recorded activity via daily steps for 2-week periods. In addition, we measured body composition, grip strength, and assessed nutritional status. RESULTS: Analysis of body composition and daily activity indicated that women who walked more than 4000 steps had lower fat mass and increased muscle mass. Men with >3.0 metabolic equivalents (METs) when walking had lower body fat. CONCLUSION: For healthy older Japanese individuals in this snowy winter region, walking >4000 steps daily for women and exercise of >3.0 METs for men may indicate health-promoting activities.

Development of a Deep Learning-Based Algorithm to Detect the Distal End of a Surgical Instrument
Hiroyuki Sugimori, Taku Sugiyama, Naoki Nakayama, Akemi Yamashita, Katsuhiko Ogasawara
Applied Sciences, 10, 12, Jun. 2020, [Peer-reviewed]
English, Scientific journal

Possibility of introducing telemedicine services in Asian and African countries
Teppei Suzuki, Juri Hotta, Tomomi Kuwabara, Hiroko Yamashina, Tomoki Ishikawa, Yuji Tani, Katsuhiko Ogasawara
Health Policy and Technology, 9, 1, 13, 22, 2020, [Peer-reviewed]
English, Scientific journal

診療情報の漏えいに関する仮想評価法による受入意思額の推定
谷川 琢海, 笹本 恭平, 谷 祐児, 小笠原 克彦
日本放射線技術学会雑誌, 75, 11, 1277, 1285, (公社)日本放射線技術学会, Nov. 2019
Japanese

Assessing Visual Attention of Mammography Positioning Using Eye Tracking System: A Comparison between Experts and Novices
Yamashina H, Kano S, Suzuki T, Yagahara A, Ogasawara K
Nihon Hoshasen Gijutsu Gakkai zasshi, 75, 11, 1316, 1324, Nov. 2019, [Peer-reviewed]

Cost comparison between open radical cystectomy, laparoscopic radical cystectomy, and robot-assisted radical cystectomy for patients with bladder cancer: a systematic review of segmental costs
Yasuhiro Morii, Takahiro Osawa, Teppei Suzuki, Nobuo Shinohara, Toru Harabayashi, Tomoki Ishikawa, Takumi Tanikawa, Hiroko Yamashina, Katsuhiko Ogasawara
BMC Urology, 19, 1, 110, 110, Springer, Nov. 2019, [Peer-reviewed], [International Magazine]
English, Scientific journal, BACKGROUND: Robot-assisted radical cystectomy is becoming a common treatment for bladder carcinoma. However, in comparison with open radical cystectomy, its cost-effectiveness has not been confirmed. Although few published reviews have compared total costs between the two surgical procedures, no study has compared segmental costs and explained their impact on total costs. METHODS: A systematic review was conducted based on studies on the segmental costs of open, laparoscopic, and robot-assisted radical cystectomy using PubMed, Web of Science, and Cochrane Library databases to provide insight into cost-effective management methods for radical cystectomy. The segmental costs included operating, robot-related, complication, and length of stay costs. A sensitivity analysis was conducted to determine the impact of the annual number of cases on the per-case robot-related costs. RESULTS: We identified two studies that compared open and laparoscopic surgeries and nine that compared open and robotic surgeries. Open radical cystectomy costs were higher than those of robotic surgeries in two retrospective single-institution studies, while robot-assisted radical cystectomy costs were higher in 1 retrospective single-institution study, 1 randomized controlled trial, and 4 large database studies. Operating costs were higher for robotic surgery, and accounted for 63.1-70.5% of the total robotic surgery cost. Sensitivity analysis revealed that robot-related costs were not a large proportion of total surgery costs in institutions with a large number of cases but accounted for a large proportion of total costs in centers with a small number of cases. CONCLUSIONS: The results show that robot-assisted radical cystectomy is more expensive than open radical cystectomy. The most effective methods to decrease costs associated with robotic surgery include a decrease in operating time and an increase in the number of cases. Further research is required on the cost-effectiveness of surgeries, including quality measures such as quality of life and quality-adjusted life years.

Relationship between accessibility and resources to treat acute ischemic stroke in Hokkaido, Japan
Ishikawa T, Mizuguchi H, Murayama H, Fujiwara K, Tanikawa T, Kobayashi E, Ogasawara K
Health Policy and Technology, Oct. 2019, [Peer-reviewed]
English, Scientific journal

生活習慣の改善意思に影響を与える要因および地域性の可視化―ベイジアンネットワークを用いた自治体の特定健診データ分析―　　　　　　　　　　　　　　　
鈴木 哲平, 田村菜穂美, 榎本 尚司, 永井 亘, 小笠原克彦
医療情報学, 39, 2, 85, 98, 篠原出版新社, Oct. 2019, [Peer-reviewed]
Japanese, Scientific journal

放射線技術学用語集の電子化に向けて【後編】学術調査研究班から用語集管理小委員会までの活動
谷川原 綾子, 辻 真太朗, 福田 晋久, 西本 尚樹, 谷川 琢海, 川眞田 実, 内田 幸司, 小笠原 克彦, 用語集管理小委員会
日本放射線技術学会雑誌, 75, 9, 1101, 1108, (公社)日本放射線技術学会, Sep. 2019
Japanese

Forecasting maldistribution of human resources for healthcare and patients in Japan: a utilization-based approach
Tomoki Ishikawa, Yuji Nakao, Kensuke Fujiwara, Teppei Suzuki, Shintaro Tsuji, Katsuhiko Ogasawara
BMC Health Service Research, 19, 1, 653, 653, Springer, Sep. 2019, [Peer-reviewed], [International Magazine]
English, Scientific journal, BACKGROUND: Hokkaido's demographic trend of population decrease with aging population is remarkable even in Japan. Although healthcare policy decision-makers need to appropriately allocate resources while grasping regional demands, not much is available on whether medical demand would increase or not for future. In addition, little is known about what impact will current situation have on future demand-supply balance and equality by regions. This study aims to support decision-making in human resource planning for coping with changing population structure by forecasting future demand, and evaluation those regional maldistributions. METHOD: We set patients with acute myocardial infarction or cerebral stroke, and all medical care as study subjects and analyzed for 2015, 2025, and 2035 in Hokkaido and each Secondary Medical Care Area. We used a utilization-based approach to estimate the healthcare supply-demand balance in the future. Moreover, we evaluated the regional maldistribution of demand-supply balance by calculating Herfindahl-Hirschman Index, Gini Coefficients, the number of physicians/specialists per patient. Moreover, we conducted sensitivity analysis to evaluation impact on aspects of demand-supply balance by uncertainty of utilization for future. RESULTS: Our results displayed that concentration of patients will progress, while regional distribution will shrink in all subject. However, from comparison based on all medical care, Gini Coefficients of acute myocardial infarction and cerebral stroke has always been high. This suggest that the resource allocation of them has room for improvement. In addition, our analysis showed the change in this balance will differ in each region in the future. Moreover, demographic change will not consistent with the number of patient change from 2015 to 2035. CONCLUSION: These results suggest policy planners should use the number of patient by disease, by region as indicator of demand, instead of provider-to-population ratios being in use today. The result of our sensitivity analysis show two findings. First, the range of each indicator have possible for future. Second, increase of utilization, for instance lowing barrier in the use by development operation of patient transportation in AMI/CS, would improve maldistribution of opportunity for resident to get emergency medical services.

A Cost-Effectiveness Simulation of Specialist Dispatching System in Japan for Treatments of Patients with Acute Ischemic Stroke Using a Geographic Information System.
Yasuhiro Morii, Toshiya Osanai, Tomoki Ishikawa, Kensuke Fujiwara, Takumi Tanikawa, Eiichi Kobayashi, Katsuhiko Ogasawara
Studies in health technology and informatics, 264, 1861, 1862, 21 Aug. 2019, [Peer-reviewed], [International Magazine]
English, Scientific journal, Regional disparities in the implementation rates of recombinant tissue-type plasminogen activator and endovascular thrombectomy treatments have been reported in Japan. We simulated the cost-effectiveness of specialist dispatching system in Hokkaido, Japan using Geographic Information System. In the system a qualified specialist is dispatched to another hospital for endovascular thrombectomy. Since the system improved patient accessibility, and the cost- effectiveness was excellent, the system could help enhance the equality and cost-effectiveness of ischemic stroke treatments in Hokkaido.

放射線技術学用語集の電子化に向けて【前編】日本放射線技術学会における専門用語集構築の変遷と歴史
辻 真太朗, 谷川原 綾子, 福田 晋久, 西本 尚樹, 谷川 琢海, 川眞田 実, 内田 幸司, 小笠原 克彦, 用語集管理小委員会
日本放射線技術学会雑誌, 75, 8, 854, 860, (公社)日本放射線技術学会, Aug. 2019
Japanese

Efficacy of 'drive and retrieve' as a cooperative method for prompt endovascular treatment for acute ischemic stroke.
Toshiya Osanai, Yasuhiro Ito, Satoshi Ushikoshi, Takeshi Aoki, Masahito Kawabori, Kensuke Fujiwara, Katsuhiko Ogasawara, Kikutaro Tokairin, Katsuhiko Maruichi, Naoki Nakayama, Ken Kazumata, Kota Ono, Kiyohiro Houkin
Journal of neurointerventional surgery, 11, 8, 757, 761, Aug. 2019, [Peer-reviewed], [International Magazine]
English, Scientific journal, BACKGROUND: Outcomes of endovascular treatment for acute ischemic stroke depend on the time interval from onset to reperfusion. Although the centralized 'mothership' method is considered preferable, the required transportation time increases the risk that a patient with a stroke may not receive intravenous or endovascular therapy. In contrast, 'drive and retrieve' describes a system wherein doctors from comprehensive stroke centers travel to primary stroke centers and provide endovascular treatment for acute ischemic stroke. OBJECTIVE: To describe the drive and retrieve system and verify the effects of this new collaboration on outcomes in patients with acute ischemic stroke among facilities. METHODS: This non-randomized, single-arm study retrospectively analyzed patients who met the inclusion criteria for endovascular treatment provided through a drive and retrieve system. Among the 122 patients treated by this system, we analyzed the time of onset to recanalization as the primary outcome. We also analyzed the efficacy of the drive and retrieve system using geographic information system analysis. RESULTS: The median time from onset to recanalization was 229 min (IQR 170-307 min, 95% CI 201 to 252 min). The upper limit of the 95% CI for the time from onset to recanalization was shorter than the median times reported in two previous trials. Geographic information system analysis revealed an upward trend in the population coverage rate in each secondary medical area after the drive and retrieve method was introduced. CONCLUSION: The drive and retrieve method may be an effective form of cooperation between facilities located within 1 hour of a comprehensive stroke center.

Simulating Cost-effectiveness of Continuous Glucose Monitoring Mobile Application for Patient with Type 2 Diabetes Mellitus
Tsuji s, Zhang H, Suzuki T, Ishikawa T, Morii Y, Tanikawa T, Nakaya J, Ogasawara K
Journal of Medical Internet Research, 22, 9, e16053, Aug. 2019, [Peer-reviewed], [International Magazine]
English, Scientific journal, BACKGROUND: Apps for real-time continuous glucose monitoring (CGM) on smartphones and other devices linked to CGM systems have recently been developed, and such CGM apps are also coming into use in Japan. In comparison with conventional retrospective CGM, the use of CGM apps improves patients' own blood glucose control, which is expected to help slow the progression of type 2 diabetes mellitus (DM) and prevent complications, but the effect of their introduction on medical costs remains unknown. OBJECTIVE: Our objective in this study was to perform an economic appraisal of CGM apps from the viewpoint of assessing public medical costs associated with type 2 DM, using the probability of developing type 2 DM-associated complications, and data on medical costs and utility value to carry out a medical cost simulation using a Markov model in order to ascertain the cost-effectiveness of the apps. METHODS: We developed a Markov model with the transition states of insulin therapy, nephrosis, dialysis, and cardiovascular disease, all of which have a major effect on medical costs, to identify changes in medical costs and utility values resulting from the introduction of a CGM app and calculated the incremental cost-effectiveness ratio (ICER). RESULTS: The ICER for CGM app use was US $33,039/quality-adjusted life year (QALY). CONCLUSIONS: Sensitivity analyses showed that, with the exception of conditions where the transition probability of insulin therapy, utility value, or increased medical costs increases, the ICER for the introduction of CGM apps was below the threshold of US $43,478/QALY used by the Central Social Insurance Medical Council. Our results provide basic data on the cost-effectiveness of introducing CGM apps, which are currently starting to come into use.

Cost effectiveness of Drive and Retrieve System in Hokkaido for Acute Ischemic Stroke Patient Treatment Using Geographic Information System
Morii Y, Osanai T, Ishikawa T, Fujiwara K, Tanikawa T, Houkin K, Kobayashi E, Ogasawara K
Journal of Stroke and Cerebrovascular Diseases, 28, 8, 2292, 2301, Aug. 2019, [Peer-reviewed]
English, Scientific journal

Survey on the willingness to pay for tele-health consultation　　　　　　　　　　　　　　　
Teppei Suzuki, Tamotsu Abe, Shintaro Tsuji, Tomoko Shimoda, Sadako Yoshimura, Katsuhiko Ogasawara
Health Policy and Technology, Health Policy and Technology, Jul. 2019, [Peer-reviewed]
Japanese, Scientific journal

Projecting future supply and demand for physical therapists in Japan using system dynamics
Morii Yasuhiro, Ishikawa Tomoki, Suzuki Teppei, Tsuji Shintaro, Yamanaka Masanori, Ogasawara Katsuhiko, Yamashina Hiroko
HEALTH POLICY AND TECHNOLOGY, 8, 2, 118, 127, Jun. 2019, [Peer-reviewed]

Where Does Telemedicine Achieve a Cost Reduction Effect? Cost Minimization Analysis of Teleradiology Services in Japan
Takumi Tanikawa, Reina Suzuki, Teppei Suzuki, Tomoki Ishikawa, Hiroko Yamashina, Shintaro Tsuji, Katsuhiko Ogasawara
Telemedicine and e-Health, 25, 12, 1174, 1182, Apr. 2019, [Peer-reviewed], [International Magazine]
English, Scientific journal, Background: Telemedicine as a technology is expected to resolve issues such as doctor shortages and disparities in medical services. However, high costs of system installation and maintenance inhibit its widespread use. Introduction: This study involved a cost minimization analysis for installation of a teleradiology system in the Hokkaido prefecture of Japan. Conditions under which system utilization is cost-efficient and system utilization is effective for cost reduction were analyzed. Materials and Methods: A cost minimization analysis was conducted using three geospatial points of 50, 100, and 200 km from Sapporo city, the prefectural capital of Hokkaido, assuming a central imaging diagnosis center in Sapporo. The analysis was conducted from the standpoint of both patients and requesting hospitals. Results: From the patient's standpoint, a cost reduction effect was observed at all three distances from system installation. In contrast, from the hospital's standpoint, a cost reduction effect was found only when teleradiology examination was conducted from a distance of at least 100 km from Sapporo. Discussion: Results show that the cost reduction effect for patients increased as the travel distance increased. Although the teleradiology service is beneficial for a wide range of patients, the financial burden on requesting hospitals is significant. Conclusions: The following conditions were found necessary to reduce the requesting hospital's financial burden: the hospital should be far from the imaging diagnosis center, an inexpensive system is to be selected, and the system needs to be utilized continuously.

Preface for Special Issue on the Medical Safety of Radiological Technology
Ogasawara Katsuhiko, Doi Tsukasa, Aso Tomohiko, Ueda Katsuhiko, Hashida Masahiro
Japanese Journal of Radiological Technology, 75, 11, 1247, 1248, Japanese Society of Radiological Technology, 2019
Japanese, Scientific journal

相関分析を用いた医療機器および病院情報システム導入時における重要因子の検討
谷 祐児, 藤原 健祐, 鈴木 哲平, 小笠原 克彦
日本放射線技術学会雑誌, 75, 5, 429, 437, (公社)日本放射線技術学会, 2019, [Peer-reviewed]
Japanese, Scientific journal, 医療機器および病院情報システム(HIS)の導入における重要因子を、相関分析を用いて検討した。対象病院におけるHIS導入に向けて、まずプロジェクトチーム(PT)を7名で発足させた。PT主導の下に、他病院のシステム見学会、医療情報システム関連勉強会等をはじめとした全職員およびワーキンググループ(WG)メンバーに向けた情報提供を実施し、各イベント終了時にはアンケート調査を実施した。今回試行した一連の手法は対象病院では過去にまったく経験がなかったため、WG活動開始直後は戸惑いからか各メンバーとも積極性はあまりみられず、WGミーティングにおいても各メンバーからの発言や意見はあまり出なかった。各イベントにより相関分析の結果は多少異なるが、プロジェクト関連当該イベントの必要度と参加意欲間およびプロジェクト関連当該イベントの満足度と参加意欲間で有意に高い相関が認められた。

Analysis of the Regionality of the Number of Tweets Related to the 2011 Fukushima Nuclear Power Station Disaster: Content Analysis
Tomohiro Aoki, Teppei Suzuki, Ayako Yagahara, Shin Hasegawa, Shintaro Tsuji, Katsuhiko Ogasawara
JMIR Public Health and Surveillance, 4, 4, 1, 11, JMIR Publications Inc., Dec. 2018, [Peer-reviewed], [International Magazine]
Japanese, Scientific journal, BACKGROUND: The Great East Japan Earthquake on March 11, 2011, triggered a huge tsunami, causing the Fukushima Daiichi nuclear disaster. Radioactive substances were carried in all directions, along with the risks of radioactive contamination. Mass media companies, such as television stations and news websites, extensively reported on radiological information related to the disaster. Upon digesting the available radiological information, many citizens turned to social media, such as Twitter and Facebook, to express their opinions and feelings. Thus, the Fukushima Daiichi nuclear disaster also changed the social media landscape in Japan. However, few studies have explored how the people in Japan who received information on radiation propagated the information. OBJECTIVE: This study aimed to reveal how the number of tweets by citizens containing radiological information changed regionally on Twitter. METHODS: The research used about 19 million tweets that included the terms "radiation," "radioactivity," and "radioactive substance" posted for 1 year after the Fukushima Daiichi nuclear disaster. Nearly 45,000 tweets were extracted based on their inclusion of geographic information (latitude and longitude). The number of monthly tweets in 4 districts (Fukushima Prefecture, prefectures around Fukushima Prefecture, within the Tokyo Electric Power Company area, and others) were analyzed. RESULTS: The number of tweets containing the keywords per 100,000 people at the time of the casualty outbreak was 7.05 per month in Fukushima Prefecture, 2.07 per month in prefectures around Fukushima Prefecture, 5.23 per month in the area within Tokyo Electric Power Company, and 1.35 per month in others. The number of tweets per 100,000 people more than doubled in Fukushima Prefecture 2 months after the Fukushima Daiichi nuclear disaster, whereas the number decreased to around 0.7~0.8 tweets in other districts. CONCLUSIONS: The number of tweets per 100,000 people became half of that on March 2011 3 or 4 months after the Fukushima Daiichi Nuclear Plant disaster in 3 districts except district 1 (Fukushima Prefecture); the number became a half in Fukushima Prefecture half a year later.

診療放射線技師数の需要と供給の将来予測
青木 祐美, 谷 祐児, 藤原 健祐, 小笠原 克彦
JART: 日本診療放射線技師会誌, 65, 10, 1157, 1163, (公社)日本診療放射線技師会, Oct. 2018
Japanese

Evaluating the adequacy of medical care systems in Hokkaido, Japan
Tomomi Kuwabara, Ayako Yagahara, Katsuhiko Ogasawara
Health Policy and Technology, Elsevier {BV}, Sep. 2018

Penetration factors and introduction possibility for image diagnostic equipment
Teppei Suzuki, Yusuke Isomi, Shintaro Tsuji, Yuji Tani, Takumi Tanikawa, Hiroko Yamasina, Katsuhiko Ogasawara
Health Policy and Technology, 7, 2, 142, 148, Elsevier B.V., 01 Jun. 2018, [Peer-reviewed]
English, Scientific journal

Factors affecting bone mineral density among snowy region residents in Japan: Analysis using multiple linear regression and Bayesian network model
Teppei Suzuki, Tomoko Shimoda, Noriko Takahashi, Kaori Tsutsumi, Mina Samukawa, Sadako Yoshimura, Katsuhiko Ogasawara
Journal of Medical Internet Research, 20, 5, e10, Journal of Medical Internet Research, 01 May 2018, [International Magazine]
English, Scientific journal

Construction of mammographic examination process ontology using bottom–up hierarchical task analysis
Ayako Yagahara, Yuki Yokooka, Guoqian Jiang, Shintarou Tsuji, Akihisa Fukuda, Naoki Nishimoto, Kunio Kurowarabi, Katsuhiko Ogasawara
Radiological Physics and Technology, 11, 1, 73, 81, Springer Tokyo, 01 Mar. 2018, [Peer-reviewed], [Domestic magazines]
English, Scientific journal

Relationships among tweets related to radiation: Visualization using co-occurring networks
Ayako Yagahara, Keiri Hanai, Shin Hasegawa, Katsuhiko Ogasawara
Journal of Medical Internet Research, 20, 3, e26, Journal of Medical Internet Research, 01 Mar. 2018, [Peer-reviewed], [International Magazine]
English, Scientific journal

Different Risk Factors for Very Low Birth Weight, Term-Small-for-Gestational-Age, or Preterm Birth in Japan.
Naomi Tamura, Tomoyuki Hanaoka, Kumiko Ito, Atsuko Araki, Chihiro Miyashita, Sachiko Ito, Hisanori Minakami, Kazutoshi Cho, Toshiaki Endo, Kazuo Sengoku, Katsuhiko Ogasawara, Reiko Kishi
International journal of environmental research and public health, 15, 2, 21 Feb. 2018, [International Magazine]
English, Scientific journal, From 1985 to 2013, the mean birth weight of infants in Japan decreased from 3120 g to 3000 g, and the low-birth-weight rate among live births increased from 6.3% to 9.6%. No prospective study has elucidated the risk factors for poor fetal growth and preterm birth in recent Japanese parents, such as increased parental age, maternal body figure, assisted reproductive technology (ART), and socioeconomic status. Participants were mother-infant pairs (n = 18,059) enrolled in a prospective birth cohort in Hokkaido, Japan from 2002 to 2013. Parental characteristics were obtained via self-reported questionnaires during pregnancy. Medical records helped identify very-low-birth-weight (VLBW; <1500g), term-small-for-gestational-age (term-SGA), and preterm-birth (PTB; <37 weeks) infants. We calculated relative risks (RRs) for PTB, VLBW, and term-SGA birth based on parental characteristics. The prevalence of PTB, VLBW, and term-SGA was 4.5%, 0.4%, and 6.5%, respectively. Aged parents and ART were risk factors for PTB and VLBW. Maternal alcohol drinking during pregnancy increased the risk; a parental educational level of ≥16 years reduced risk of term-SGA. Maternal pre-pregnancy BMI of <18.5 kg/m² increased the risk of PTB and term-SGA. The RR for low BMI was highest among mothers who have low educational level. Among various factors, appropriate nutritional education to maintain normal BMI is important to prevent PTB and term-SGA in Japan.

Evaluation of Efficiencies on the Gadoxetic Acid-enhanced MRI for Preoperative Assessment of Liver Metastases from Colorectal Carcinoma
岩田邦弘, 森谷俊春, 中川貞裕, 小笠原克彦
日本放射線技術学会雑誌, 74, 1, 29‐38(J‐STAGE), 2018
Japanese

Appling Text-mining to Extracting Technical Terms from Textbooks-Toward Updating the Terminology in the Field of Radiology Technology-
辻真太朗, 谷川原綾子, 福田晋久, 谷川琢海, 川眞田実, 西本尚樹, 島井健一郎, 星野修平, 小笠原克彦
日本放射線技術学会雑誌, 74, 8, 757‐768(J‐STAGE), 768, 2018, [Peer-reviewed], [Domestic magazines]
Japanese, Scientific journal, Although terminology requires continuous consideration of recorded technical terms, extracting these terms manually is difficult, because the number of recorded terms is constantly increasing. Text-mining acquires information from numerous documents, and is capable of extracting technical terms. The purpose of this study is to extract candidate terms using text-mining toward updating the terminology of Japanese society of radiological technology (JSRT). First, the subjects for this study were textbooks published by the JSRT, and morphological analysis was conducted, which is an analysis to break the books up into meaningful words. Additionally, index terms of textbooks were extracted. Second, we observed overlaps between the JSRT technical terms and the terms obtained from the morphological analysis and the indexes of textbooks and the extracted terms were absent in the JSRT terminology. The overlap was 53.6% (3090/5770 terms). The terms, "imaging technology for magnetic resonance" and "information and system in radiological technology" were missing from the JSRT terminology. From these results, it was estimated that half number of the JSRT technical terms were changing with time. This study demonstrated that text mining showed the differences between old and new technical terms.

A Comparison of Distribution Equality between Health Care Occupations in Hokkaido
森井康博, 石川智基, 辻真太朗, 鈴木哲平, 小笠原克彦
医療情報学, 37, 6, 285‐289, Jan. 2018, [Peer-reviewed]
Japanese

Accessibility to Tertiary Stroke Centers in Hokkaido, Japan: Use of Novel Metrics to Assess Acute Stroke Care Quality.
Kensuke Fujiwara, Toshiya Osanai, Eiichi Kobayashi, Takumi Tanikawa, Ken Kazumata, Kikutaro Tokairin, Kiyohiro Houkin, Katsuhiko Ogasawara
Journal of stroke and cerebrovascular diseases : the official journal of National Stroke Association, 27, 1, 177, 184, Jan. 2018, [Peer-reviewed], [International Magazine]
English

高齢女性における尿失禁と立ち上がり機能の関係性について　　　　　　　　　　　　　　　
寒川 美奈, 鈴木 哲平, 下田 智子, 堤 香織, 高橋 紀子, 高島 理沙, 辻 真太朗, 村田 和香, 良村 貞子, 小笠原 克彦
日本未病システム学会学術総会抄録集, 24回, 134, 134, (一社)日本未病学会, Oct. 2017
Japanese

Willingness to Pay for Elderly Telecare Service Using the Internet and Digital Terrestrial Broadcasting
Satoshi Kaga, Teppei Suzuki, Katsuhiko Ogasawara
Interactive Journal of Medical Research, 6, 2, e21, {JMIR} Publications Inc., Oct. 2017, [Peer-reviewed], [International Magazine]
English, Scientific journal, BACKGROUND: In Japan over the past few years, more attention has been focused on unnoticed solitary death in the context of an aging society and the trend toward nuclear family. A number of institutions and companies have implemented a prevention measure with digital terrestrial broadcasting telecare services for the elderly: Hokkaido University; TV-Asahi Corporation; Hitachi, Ltd; Iwamizawa City; Hokkaido Television Broadcasting Co, Ltd; and Hamanasu Information Co, Ltd. Although this system is provided free of charge as a demonstration test, determining the appropriate price for the service is required for its sustainable operation. OBJECTIVE: The aim of this study was to quantify individual willingness to pay (WTP) so as to test the tenability of digital terrestrial broadcasting service for elderly telecare. METHODS: We used the contingent valuation method (CVM) to estimate the WTP for this service among 305 citizens (valid response rate 76.0%) living in Japan. A questionnaire survey was conducted for people aged 18 to 100 years according to Japanese age distribution from September 2016. To elicit WTP, we adopted a double-bound dichotomous choice method to ask the respondents whether they agree or disagree with the price we offered. RESULTS: The median WTP for this service's monthly fee is estimated to be 431 JPY (approximately US $3.7). The finding suggests that gender (0.66, P=.01), health consciousness (1.08, P=.01), willingness to use (2.38, P<.001), and seeing others less than once a week (1.00, P=.06) made a positive effect on WTP. CONCLUSIONS: We conclude that reliable WTP was elicited by CVM based on an Internet survey. Calculated median WTP for digital terrestrial broadcasting service for elderly telecare was 431 JPY (approximately US $3.7). In the analysis of factors that affect WTP, constant factors, log-bid, health consciousness, gender, see others less than one time for week, and willingness to use made positive effect to probability of acceptance. In comparison of WTP in different groups, age groups showed that WTP of the elderly group was higher than WTP of the middle age group and younger age group. However, WTP surveys need to be carefully conducted to minimize the sampling bias and allocate accurate structure of gender distribution.

Forecasting the regional distribution and sufficiency of physicians in Japan with a coupled system dynamics-geographic information system model
Tomoki Ishikawa, Kensuke Fujiwara, Hisateru Ohba, Teppei Suzuki, Katsuhiko Ogasawara
HUMAN RESOURCES FOR HEALTH, 15, 64, Sep. 2017, [Peer-reviewed]
English, Scientific journal

コンジョイント分析法を用いた診療放射線技師の就労環境の選好に関わる要因分析
藤原 健祐, 谷川原 綾子, 井上 剛, 北川 剛, 小笠原 克彦
日本放射線技術学会雑誌, 73, 8, 626, 635, (公社)日本放射線技術学会, Aug. 2017
Japanese

Factors Affecting Bone Mineral Density Among Snowy Region Residents in Japan: Analysis Using Multiple Linear Regression and Bayesian Network Model (Preprint)
Teppei Suzuki, Tomoko Shimoda, Noriko Takahashi, Kaori Tsutsumi, Mina Samukawa, Sadako Yoshimura, Katsuhiko Ogasawara
{JMIR} Publications Inc., Jul. 2017, [Peer-reviewed]

Relationship Using multiple linear regression analysis and Bayesian network model analysis of factors affecting bone mineral density of residents in snowy region of Japan
Jul. 2017, [Peer-reviewed]

領域制限法による北海道自治体病院の経営効率性評価　　　　　　　　　　　　　　　
佐々木健太, 石川 智基, 藤原 健祐, 谷 祐児, 小笠原克彦
医療情報学, 37, 2, 81, 86, Apr. 2017, [Peer-reviewed]
Japanese, Scientific journal

Developing and Evaluating Radiotherapy Ordering System Applied JJ1017 Codes
Shintaro Tsuji, Ayako Yagahara, Yamato Wakabayashi, Kenji Horita, Katsuhisa Fujita, Katsuhiko Ogasawara
JOURNAL OF MEDICAL IMAGING AND HEALTH INFORMATICS, 7, 1, 64, 72, Feb. 2017, [Peer-reviewed]
English, Scientific journal

Willingness to Pay for Elderly Tele-Care System Using Digital Terrestrial Broadcasting.
Ogasawara Katsuhiko, Kaga Satoshi, Suzuki Teppei, Tani Yuji, Higashikawa Fumihiro, Enomoto Hisashi, Moriyama Hiroyuki, Kise Nobuyuki
Studies in health technology and informatics, 245, 1366, 1366, 2017, [International Magazine]
English, Scientific journal, The aim of this research is to quantify individual willingness-to-pay (WTP) to test effectiveness of Digital terrestrial broadcasting elderly tele-care system.We used contingent valuation method (CVM) to estimate the WTP for this system among 400 citizens living in Japan. The median WTP for this services's monthly fee is estimated to be 431 JPY. The finding suggests that people who cares their health were pay more to use this system.

放射線技術学における研究倫理 臨床研究における倫理(2)
西本 尚樹, 小笠原 克彦
日本放射線技術学会雑誌, 73, 1, 69, 77, (公社)日本放射線技術学会, Jan. 2017
Japanese

7. Ethics in Clinical Research (2)
Nishimoto Naoki, Ogasawara Katsuhiko
Japanese Journal of Radiological Technology, 73, 1, 69, 77, Japanese Society of Radiological Technology, 2017
Japanese

Nutritional Status and Body Composition of Independently Living Older Adults in a Snowy Region of Japan
Tomoko Shimoda, Teppei Suzuki, Noriko Takahashi, Kaori Tsutsumi, Mina Samukawa, Shoko Yoshimachi, Teruaki Goto, Hisashi Enomoto, Nobuyuki Kise, Katsuhiko Ogasawara, Sadako Yoshimura
GERONTOLOGY AND GERIATRIC MEDICINE, 3, Jan. 2017
English, Scientific journal

放射線技術学における研究倫理 臨床研究における倫理(1)
西本 尚樹, 小笠原 克彦
日本放射線技術学会雑誌, 72, 12, 1268, 1276, (公社)日本放射線技術学会, Dec. 2016
Japanese

Estimating the Duration of Public Concern After the Fukushima Dai-ichi Nuclear Power Station Accident from the Occurrence of Radiation Exposure-Related Terms on Twitter: A Retrospective Data Analysis
Naoki Nishimoto, Mizuki Ota, Ayako Yagahara, Katsuhiko Ogasawara
JMIR Public Health and Surveillance, 2, 2, e168, {JMIR} Publications Inc., Nov. 2016, [Peer-reviewed], [International Magazine]
English, Scientific journal, BACKGROUND: After the Fukushima Dai-ichi Nuclear Power Station accident in Japan on March 11, 2011, a large number of comments, both positive and negative, were posted on social media. OBJECTIVE: The objective of this study was to clarify the characteristics of the trend in the number of tweets posted on Twitter, and to estimate how long public concern regarding the accident continued. We surveyed the attenuation period of the first term occurrence related to radiation exposure as a surrogate endpoint for the duration of concern. METHODS: We retrieved 18,891,284 tweets from Twitter data between March 11, 2011 and March 10, 2012, containing 143 variables in Japanese. We selected radiation, radioactive, Sievert (Sv), Becquerel (Bq), and gray (Gy) as keywords to estimate the attenuation period of public concern regarding radiation exposure. These data, formatted as comma-separated values, were transferred into a Statistical Analysis System (SAS) dataset for analysis, and survival analysis methodology was followed using the SAS LIFETEST procedure. This study was approved by the institutional review board of Hokkaido University and informed consent was waived. RESULTS: A Kaplan-Meier curve was used to show the rate of Twitter users posting a message after the accident that included one or more of the keywords. The term Sv occurred in tweets up to one year after the first tweet. Among the Twitter users studied, 75.32% (880,108/1,168,542) tweeted the word radioactive and 9.20% (107,522/1,168,542) tweeted the term Sv. The first reduction was observed within the first 7 days after March 11, 2011. The means and standard errors (SEs) of the duration from the first tweet on March 11, 2011 were 31.9 days (SE 0.096) for radioactive and 300.6 days (SE 0.181) for Sv. These keywords were still being used at the end of the study period. The mean attenuation period for radioactive was one month, and approximately one year for radiation and radiation units. The difference in mean duration between the keywords was attributed to the effect of mass media. Regularly posted messages, such as daily radiation dose reports, were relatively easy to detect from their time and formatted contents. The survival estimation indicated that public concern about the nuclear power plant accident remained after one year. CONCLUSIONS: Although the simple plot of the number of tweets did not show clear results, we estimated the mean attenuation period as approximately one month for the keyword radioactive, and found that the keywords were still being used in posts at the end of the study period. Further research is required to quantify the effect of other phrases in social media data. The results of this exploratory study should advance progress in influencing and quantifying the communication of risk.

冬期における豪雪地域住民の年代別体組成および骨密度の実態 高齢者の筋肉量と骨密度に着目して　　　　　　　　　　　　　　　
下田 智子, 鈴木 哲平, 堤 香織, 高橋 紀子, 寒川 美奈, 後藤 輝明, 吉町 昌子, 小笠原 克彦, 良村 貞子
日本未病システム学会学術総会抄録集, 23回, 125, 125, (一社)日本未病学会, Oct. 2016
Japanese

北海道における放射線診療資源の地理的分布の経年比較 ジニ係数とハーフィンダール・ハーシュマン指数を用いた分析
藤原 健祐, 谷川原 綾子, 谷川 琢海, 谷 祐児, 大場 久照, 小笠原 克彦
日本放射線技術学会雑誌, 72, 10, 970, 977, (公社)日本放射線技術学会, Oct. 2016
Japanese, 北海道における放射線診療資源の地理的分布の経年比較について、ジニ係数(GC)とハーフィンダール・ハーシュマン指数(HHI)を用いて分析した。放射線診療資源は、放射線診療機器としてCT、MRI、放射線治療機器(RTF)、医療従事者として放射線診療機器の操作・管理を行う診療放射線技師(技師)を対象とした。1999年から2014年におけるGCの医師及びCTの変化量は微小であり分布に大きな変化はみられないが、MRI、RTF、技師のGCは低下し、特にRTFはその度合いが大きく不均一分布の改善傾向がみられた。いずれの年次においても医師のHHIは人口のHHIよりも高く、MRI、RTF、技師についても同様であり、都市部へ集中した。医師のみGCとHHIが共に上昇し、CT、MRI、RTF、技師はGCが低下しているもののHHIが上昇した。

Problem-based learning for radiological technologists: a comparison of student attitudes toward plain radiography
Takayoshi Terashita, Naomi Tamura, Kengo Kisa, Hidenobu Kawabata, Katsuhiko Ogasawara
BMC MEDICAL EDUCATION, 16, 1, 236, Sep. 2016, [Peer-reviewed]
English, Scientific journal

Behavioral Analysis of Visitors to a Medical Institution’s Website Using Markov Chain Monte Carlo Methods　　　　　　　　　　　　　　　
Teppei Suzuki, Yuji Tani, Katsuhiko Ogasawara
Journal of Medical Internet Research, 18, 7, 1, 11, Jul. 2016, [Peer-reviewed]
Japanese, Scientific journal

Visualization of the X-ray Radiography Technical Process by Hierarchical Task Analysis
Yuki Yokooka, Ayako Yagahara, Shintaro Tsuji, Naoki Nishimoto, Masahito Uesugi, Yasuo Okuda, Katsuhiko Ogasawara
JOURNAL OF MEDICAL IMAGING AND HEALTH INFORMATICS, 6, 2, 532, 538, Apr. 2016, [Peer-reviewed]
English, Scientific journal

A Study of a Development of Internal Exposure Management Tool Suited for Japanese Diet Behavior
長谷川,慎, 奥,真也, 藤瀬,大助, 吉田,裕貴, 矢島,千秋, 奥田,保男, Schneider,Thierry, Lochard,Jacques, 川口,勇生, 栗原,治, 松本,雅紀, 青野,辰雄, 小笠原,克彦, 吉永,信治, 吉田,聡
Radiological Issues for Fukushima’s Revitalized Future, 221, 232, Springer Japan, Mar. 2016, [Peer-reviewed]
English, Scientific journal

放射線技術学に関する用語集の日本語表記と意味記述に関する比較
谷川原 綾子, 辻 真太朗, 福田 晋久, 西本 尚樹, 小笠原 克彦
日本放射線技術学会雑誌, 72, 3, 203, 208, (公社)日本放射線技術学会, Mar. 2016
Japanese, 放射線技術学に関する用語集の日本語表記と意味記述について比較検討した。放射線技術学用語集(1994年)・放射線技術学用語集・補遺編(2003年)(JSRT用語集)、電子放射線診療用語集(JRS用語集)、医学物理学用語集(JSMP用語集)を用いた。JSRT用語集から5620表記、JRS用語集から6015表記、JSMP用語集から6829語、重複を除いて全14982語を抽出した。二つ以上の用語集で英語表記の一致が見られた用語は2735語(18.3%)、全ての用語集で一致した用語は801語(5.3%)であった。三つの用語集で英語表記が一致していた用語について、二つ以上の用語集で日本語表記が一致した用語は752語(93.9%)、二つ以上の用語集で英語表記が一致した用語では、1240語(64.1%)が日本語表記においても一致した。JSRT用語集、JRS用語集から英語表記が一致した1233語中、両方に意味が記述されていた用語は351語(28.5%)で、意味が異なった用語は8語あった。

6. Ethics in Clinical Research (1)
Naoki Nishimoto, Katsuhiko Ogasawara
Nihon Hoshasen Gijutsu Gakkai zasshi, 72, 12, 1268, 1276, 01 Jan. 2016
English, Scientific journal

Proposal for bottom-up hierarchical task analysis: application to the mammography examination process
A. Yagahara, H. Sato, Y. Yokooka, S. Tsuji, K. Kurowarabi, K. Ogasawara
Journal of Medical Imaging and Health Informatics, 5, 7, 1429, 1434, American Scientific Publishers, 01 Nov. 2015
English, International conference proceedings

特別豪雪地帯に住む高齢者の積雪時および非積雪時の活動量と体組成の実態調査　　　　　　　　　　　　　　　
下田 智子, 寒川 美奈, 小笠原 克彦, 良村 貞子
日本未病システム学会学術総会抄録集, 22回, 131, 131, (一社)日本未病学会, Sep. 2015
Japanese

Gd-EOB-DTPA造影MRI検査の大腸癌術前肝転移検索における効率の評価　　　　　　　　　　　　　　　
岩田 邦弘, 中川 貞裕, 森谷 俊春, 高瀬 崚研, 谷川 琢海, 小笠原 克彦
日本放射線技術学会雑誌, 71, 9, 833, 833, (公社)日本放射線技術学会, Sep. 2015
Japanese

医療機関Webサイトの医療情報充実度　　　　　　　　　　　　　　　
鈴木哲平, 佐々木彩乃, 林和輝, 谷川原綾子, 小笠原克彦
医療情報学, 3, 35, 133, 140, Jul. 2015, [Peer-reviewed]
Japanese, Scientific journal

ARIMAモデルを利用した医療機器更新による収益性の検討
谷 祐児, 佐瀬 雄治, 小笠原 克彦
医療情報学, 35, 2, 55, 61, Jun. 2015, [Peer-reviewed]
Japanese, Scientific journal

放射線技術分野への応用に向けたオントロジーの分類
福田 晋久, 辻 真太朗, 谷川原 綾子, 西本 尚樹, 小笠原 克彦
日本放射線技術学会雑誌, 71, 6, 505, 511, (公社)日本放射線技術学会, Jun. 2015
Japanese

放射線技術学領域における用語オントロジーの構築に向けた分析
辻 真太朗, 福田 晋久, 谷川原 綾子, 西本 尚樹, 本間 勝美, 小笠原 克彦
日本放射線技術学会雑誌, 71, 3, 186, 193, (公社)日本放射線技術学会, Mar. 2015
Japanese, 放射線技術学分野の用語オントロジーの構築の検討を進めるため、学会名鑑に記載されている臨床医学、心理・教育学、総合工学の学会群を対象に、用語集の構築の有無を確認すると共に、各領域の用語集の特徴を比較した。各学会の公式ウェブサイトを検索した結果、用語集を構築しているのは臨床医学167学会中20学会、心理・教育学104学会中4学会、総合工学40学会中7学会であった。臨床医学分野の用語集は、他の分野と比較して電子媒体を中心とした用語集の電子化が進んでおり、閲覧者がPDFファイルとして入手することができ、日本語に対する英語の訳も記載されていた。一方課題として、電子媒体の用語集は収録語の増加に伴い検索・閲覧方法に限界があり、継続的なメンテナンスも容易ではなく、今後はオントロジー技術を利用することが必要と考えられた。

[An analysis of existing terminology towards constructing ontology in the field of the radiological technology].
Shintaro Tsuji, Akihisa Fukuda, Ayako Yagahara, Naoki Nishimoto, Katsumi Homma, Katsuhiko Ogasawara
Nihon Hoshasen Gijutsu Gakkai zasshi, 71, 3, 186, 93, Mar. 2015, [Domestic magazines]
Japanese, Scientific journal, PURPOSE: In 1994, Japanese Society of Radiological Technology (JSRT) constructed the lexicon in the field of radiologic technology. However, recently, latest lexicon is not updated yet. The purpose of this article is to compare the terminologies in clinical medicine with the others and to consider reconstructing the lexicon in the radiological technology. MATERIALS AND METHODS: Our study selected three categories from the database of the academic society. These three groups were Clinical medicine (hereafter CM, 167 societies, includes JSRT), Psychology / Education (hereafter P/E, 104 societies), and Comprehensive synthetic engineering (hereafter CSE, 40 societies). First, all societies were surveyed to know whether there were any lexicon in their official website. Second, these terminologies were surveyed on the following criteria: (a) Media of lexicon, (b) Number of terms, (c) File type of lexicon, (d) Terms translated into English, (e) Way of searching terms, and (f) Number of committees of the terminology. RESULTS: Lexicon in CM, P/E, and CSE had 20, 4, and 7. Compared with P/E and CSE, CM showed the following trends: (a) used electronic media frequently, (b) stored large number of terms (about 5,000 to 11,000), (c) enabled to download frequently, and (d) used the alphabet and Japanese syllabary order frequently. CONCLUSIONS: Compared with the lexicon of P/E and CSE, terminology in CM tended to adopt the electronic media of lexicon and to have large number of terms. Additionally, many lexicons were expressed in English terms along with Japanese terms. Following massive lexicon of SNOMED-CT and RadLex, it is necessary to consider applying the web-based term searching and an ontological technique to the lexicon of radiological technology.

An introduction and implementation of problem-based learning for radiography positioning training.
Terashita T, Ogasawara K
Nihon Hoshasen Gijutsu Gakkai zasshi, 71, 3, 216, 221, Mar. 2015, [Peer-reviewed]
Japanese, Scientific journal

Development and current status of an advanced telehealth consultation system in Japan
Tomoko Shimoda, Sadako Yoshimura, Yuko Yoshida, Mitsuhiro Okazaki, Teruaki Gotou, Shingo Tamura, Katsuhiko Ogasawara
Journal of Telemedicine and Telecare, 21, 176, 178, 01 Jan. 2015

電子カルテにおける診療科ごとの記載内容の類似性についての検討　　　　　　　　　　　　　　　
鈴木 千裕, 佐久嶋 研, 南須原 康行, 遠藤 晃, 小笠原 克彦
医療情報学連合大会論文集, 34回, 556, 557, (一社)日本医療情報学会, Nov. 2014
Japanese

Adjustment of Gradation Characteristics in Chest Radiography Obtained by Two Computed Radiography Models Through Luminance Measurement
Kazuhiro Ogasawara, Taketoshi Tsunemaru, Katsuhiko Ogasawara
JOURNAL OF MEDICAL IMAGING AND HEALTH INFORMATICS, 4, 5, 733, 736, Oct. 2014, [Peer-reviewed]
English, Scientific journal

Development of an Attitude-measurement Questionnaire Using the Semantic Differential Technique: Defining the Attitudes of Radiological Technology Students toward X-ray Examination.
Tamura N, Terashita T, Ogasawara K
Nihon Hoshasen Gijutsu Gakkai zasshi, 70, 3, 206, 212, 3, Mar. 2014, [Peer-reviewed]
Japanese, Scientific journal

放射線技術学で必要な基礎統計学 まとめ データの品質と解析結果の解釈
西本 尚樹, 大場 久照, 小笠原 克彦, 伊藤 陽一
日本放射線技術学会雑誌, 70, 2, 155, 162, (公社)日本放射線技術学会, Feb. 2014
Japanese

Data Quality and Interpretation of Analysis Results
Nishimoto Naoki
Jpn. J. Radiol. Technol., 70, 2, 155, 162, Japanese Society of Radiological Technology, 2014
Japanese

The prognostic value of normal stress cardiovascular magnetic resonance imaging.
岩田 邦弘, 中川 貞裕, 小笠原 克彦
Journal of Computer Assisted Tomography, 38, 1, 36, 43, Jan. 2014
English, 著者最終版OBJECTIVES:The purpose of our study was to determine the prognostic value of normal stress cardiovascular magnetic resonance imaging (CMR) by a systematic literature review and meta-analysis.METHODS:A comprehensive literature search of published studies through November 2011 in MEDLINE database and Cochrane Library, regarding prognostic value of stress CMR in patients with known or suspected coronary artery disease, was performed.RESULTS:Ultimately, we identified 11 studies. The summary relative risk ratio for major adverse cardiac events was 0.50 (95% confidence interval [CI], 0.44-0.58) for normal cine CMR and 0.09 (95% CI, 0.02-0.35) for normal perfusion CMR. The summary relative risk ratio for hard cardiac events was 0.36 (95% CI, 0.16-0.8) for normal cine CMR and 0.22 (95% CI, 0.07-0.66) for normal perfusion CMR.CONCLUSIONS:Normal stress CMR for patients known or suspected of having coronary artery disease has good prognostic value in predicting cardiac events.

Comparison of willingness to pay of continuation for three helicopter emergency medical services using the contingent valuation method
YOKOCHI Masafumi, TERASHITA Takayoshi, OGASAWARA Katsuhiko
日本医療・病院管理学会誌, 51, 1, 41, 52, Jan. 2014, [Peer-reviewed]
Japanese, Scientific journal

放射線技術学で必要な基礎統計学 サンプルサイズ
谷 祐児, 大場 久照, 西本 尚樹, 小笠原 克彦, 伊藤 陽一
日本放射線技術学会雑誌, 69, 12, 1436, 1443, (公社)日本放射線技術学会, Dec. 2013
Japanese

11. Comparing Multiple Groups with Continuous Data —One-way Analysis of Variance—
Nishimoto Naoki
Jpn. J. Radiol. Technol., 69, 11, 1320, 1330, Japanese Society of Radiological Technology, 20 Nov. 2013
Japanese

形容詞を対象とした共起する用語の可視化 放射線治療のリスクと安全に関する文献のテキストマイニング　　　　　　　　　　　　　　　
安渡 大輔, 辻 真太朗, 谷川原 綾子, 福田 晋久, 本間 勝美, 小笠原 克彦
北海道放射線技術雑誌, 75, 109, 109, (公社)日本放射線技術学会-北海道支部, Oct. 2013
Japanese

検査前有病率を考慮したMR elastographyの診断能評価 文献データを基にした判断分析を用いた検討　　　　　　　　　　　　　　　
岩田 邦弘, 谷川 琢海, 村上 昇, 鈴木 達也, 森谷 俊春, 小笠原 克彦
日本放射線技術学会雑誌, 69, 9, 1063, 1063, (公社)日本放射線技術学会, Sep. 2013
Japanese

Comparing Multiple Groups : Non-parametric Analysis
TANIKAWA Takumi
Jpn. J. Radiol. Technol., 69, 8, 885, 894, Japanese Society of Radiological Technology, 20 Aug. 2013
Japanese

Forecasting the absolute and relative shortage of physicians in Japan using a system dynamics model approach
Ishikawa T, Yokooka Y, Nakamura K, Ohba H, Ogasawara K
Human Resources for Health, 11, 41, Aug. 2013, [Peer-reviewed]
English, Scientific journal

The Number of Japanese Radiological Technologist will be increased in 40 years
Araseki M, Yokooka Y, Ishikawa T, Ogasawara K
Radiological Physics and Technology, 6, 2, 467, 473, Jul. 2013, [Peer-reviewed]
English, Scientific journal

Comparing Multiple Groups with Continuous Data : One-way Analysis of Variance
NISHIMOTO Naoki
Jpn. J. Radiol. Technol., 69, 6, 679, 688, Japanese Society of Radiological Technology, 20 Jun. 2013
Japanese

放射線技術学で必要な基礎統計学 2群の比較(4)
谷川原 綾子, 西本 尚樹, 小笠原 克彦, 伊藤 陽一
日本放射線技術学会雑誌, 69, 5, 568, 574, (公社)日本放射線技術学会, May 2013
Japanese

Comparing Two Groups for Continuous Data (2)
NISHIMOTO Naoki
Jpn. J. Radiol. Technol., 69, 2, 208, 216, Japanese Society of Radiological Technology, 20 Feb. 2013
Japanese

Comparing Two Groups for Continuous Data
YOKOOKA Yuki
Jpn. J. Radiol. Technol., 69, 1, 114, 122, Japanese Society of Radiological Technology, 20 Jan. 2013
Japanese

12. Sample Size Determination in Radiologic Technology Research
Tani Yuji
Jpn. J. Radiol. Technol., 69, 12, 1436, 1443, Japanese Society of Radiological Technology, 2013
Japanese

Analysis of hospital function for neuronal and circulatory diseases in secondary medical service areas in Hokkaido
Katsuhiko Ogasawara, Ryoya Asaoka, Yuji Sase, Tomoki Ishikawa, Kenji Fujimori
Globalism and Regional Economy, 195, 208, Taylor and Francis, 01 Jan. 2013, [Peer-reviewed]
English, In book

北海道における小児の医療施設へのアクセスの不平等性評価の試み　　　　　　　　　　　　　　　
桑原 智美, 寺下 貴美, 石川 智基, 小笠原 克彦
北海道公衆衛生学会雑誌, 26, 2, 75, 79, 2013, [Peer-reviewed]

The Trial of Business Data Analysis at the Department of Radiology by Constructing the Auto-regressive Integrated Moving-average (ARIMA) Model
TANI Yuji, OGASAWARA Katsuhiko
Jpn. J. Radiol. Technol., 68, 10, 1314, 1326, Japanese Society of Radiological Technology, 20 Oct. 2012
Japanese, This study aimed to contribute to the management of a healthcare organization by providing management information using time-series analysis of business data accumulated in the hospital information system, which has not been utilized thus far. In this study, we examined the performance of the prediction method using the auto-regressive integrated moving-average (ARIMA) model, using the business data obtained at the Radiology Department. We made the model using the data used for analysis, which was the number of radiological examinations in the past 9 years, and we predicted the number of radiological examinations in the last 1 year. Then, we compared the actual value with the forecast value. We were able to establish that the performance prediction method was simple and cost-effective by using free software. In addition, we were able to build the simple model by pre-processing the removal of trend components using the data. The difference between predicted values and actual values was 10%; however, it was more important to understand the chronological change rather than the individual time-series values. Furthermore, our method was highly versatile and adaptable compared to the general time-series data. Therefore, different healthcare organizations can use our method for the analysis and forecasting of their business data.

Research Design for the Radiologic Technology
NISHIMOTO Naoki
Jpn. J. Radiol. Technol., 68, 10, 1392, 1400, Japanese Society of Radiological Technology, 20 Oct. 2012
Japanese

How much is the labour load of a filmless system in radiology?　　　　　　　　　　　　　　　
Hiroshi Muto, Takumi Tanikawa, Takayoshi Terashita, Katsuhiko Ogasawara
Journal of Hostpital Administration, 1, 1, 30, 35, Sep. 2012, [Last author, Corresponding author]
English, Scientific journal

Introduction to Statistical Methods for Radiologic Technology
NISHIMOTO Naoki
Jpn. J. Radiol. Technol., 68, 8, 1038, 1045, Japanese Society of Radiological Technology, 20 Aug. 2012
Japanese

Geographical distribution of radiotherapy resources in Japan: investigating the inequitable distribution of human resources by using the Gini coefficient.
Takumi Tanikawa, Hisateru Ohba, Katsuhiko Ogasawara, Yasuo Okuda, Yutaka Ando
Journal of radiation research, 53, 3, 489, 91, 2012, [International Magazine]
English, Scientific journal, This is a pilot study that aims to elucidate regional disparities in the distribution of medical resources in Japan. For this purpose, we employed the Gini coefficient (GC) in order to analyze the distribution of radiotherapy resources, which are allocated to each prefecture in Japan depending on the size of its population or physical area. Our study used data obtained from the 2005 and 2007 national surveys on the structure of radiation oncology in Japan, conducted by the Japanese Society for Therapeutic Radiology and Oncology (JASTRO). Our analysis showed that the regional disparities regarding the radiation oncologists and radiotherapy technologists were small, and concluded that such resources were almost equitably distributed. However, medical physicists are inequitably distributed. Thus, policymakers should create and implement measures to train and retain medical physicists in areas with limited radiotherapy resources. Further, almost 26% of the secondary medical service areas lacked radiotherapy institutions. We attribute this observation to the existence of tertiary medical service areas, and almost all of prefectures face a shortage of such resources. Therefore, patients' accessibility to these resources in such areas should be improved.

北海道大学大学院保健科学院社会医療情報(小笠原)研究室(医療情報分野の教育機関,施設紹介Virtual Interview第21回)
小笠原 克彦
日本放射線技術学会医療情報分科会雑誌, 19, 43, 47, 公益社団法人 日本放射線技術学会, 2012
Japanese

Evaluating Applicability of Contingent Valuation Method for Cost-Benefit Analysis of Helicopter Emergency Medical Service
横地 将文, 寺下 貴美, 小笠原 克彦
日本航空医療学会雑誌, 12, 3, 10, 19, 日本航空医療学会, Jan. 2012
Japanese, 本研究ではドクターヘリの費用便益分析を行う事を最終目標とする。本研究では便益をドクターヘリに関する支払意思額とした。支払意思額の測定には仮想評価法を用いるが、質問紙で行うため事前調査が必要となる。本稿ではドクターヘリにおける仮想評価法の適用性を検討し報告する。質問対象者は札幌市から半径70km圏の住民とした。質問紙には背景・事実記述と仮想状態としてドクターヘリが廃止された場合の変化を記載した。金額の質問は税金による徴収と寄付金による徴収を用意し、16通りの選択肢から選ばせた。調査はインターネットで行った。分析は量的分析と質的分析を行った。結果は400人中366人から回答を得た（有効回答率91.5%）。支払意思額は税金が1,363円、寄付金が1,703円となり、有意差はなかった。支払意思額に影響を与える要因には、年齢、家族構成、職業、年収、ドクターヘリを知ったきっかけがあった。

Filmless versus film-based systems in radiographic examination costs: an activity-based costing method
Hiroshi Muto, Yuji Tani, Shigemasa Suzuki, Yuki Yokooka, Tamotsu Abe, Yuji Sase, Takayoshi Terashita, Katsuhiko Ogasawara
BMC HEALTH SERVICES RESEARCH, 11, 11. 10.1186/1472-6963-11-246, Sep. 2011, [Last author, Corresponding author]
English, Scientific journal

Development of terminology for mammographic techniques for radiological technologists
Ayako Yagahara, Yuki Yokooka, Shintaro Tsuji, Naoki Nishimoto, Masahito Uesugi, Hiroshi Muto, Hisateru Ohba, Kunio Kurowarabi, Katsuhiko Ogasawara
Radiological Physics and Technology, 4, 2, 121, 127, Jul. 2011, [Last author, Corresponding author]
English, Scientific journal

Survey on Medical Information Education for Radiologic Technologists Working at Hospitals
IKEDA Ryuji, OGASAWARA Katsuhiko, OKUDA Yasuo, KONISHI Yasuhiko, OHOBA Hisateru, HOSHINO Shuhei, HOSOBA Minoru
Jpn. J. Radiol. Technol., 67, 5, 541, 548, Japanese Society of Radiological Technology, 2011
Japanese, Recently, the importance of medical information for radiologic technologists has increased. The purpose of this questionnaire survey was to clarify the method of acquiring skill in medical information for radiologic technologists from the point of view of the managers of radiology departments. The questionnaire was sent to 260 hospitals that had introduced picture archiving and communication systems (PACSs) for the person responsible for medical information in the radiology department. The response rate was 35.4% (92 hospitals). The results of this survey clarified that few hospital have staff for medical information in the radiology department. Nevertheless, the excellent staff who have the skills to troubleshoot and develop systems are earnestly needed in radiology departments. To solve this problem, many technologists should understand the content, work load, and necessity of medical information. In addition, cooperation between radiologic technologist schools and hospitals is important in the field of medical information education.

Visualization of Tracheal suctioning by Activity model
コリー 紀代, 本田 千積, 阿部 保, 小笠原 克彦
医工学治療, 23, 1, 22, 33, 日本医工学治療学会, 2011
Japanese, 家族や社会福祉サービスの力を借りながら、人工呼吸器をつけた個人が在宅で過ごすことは、以前ほど珍しいことではなくなった。しかしながら、既存の社会福祉サービスでは、提供できるサービス内容に限界があるため家族に負担が強いられ、結果的に家族のパ-ンアウトや人工呼吸器をつけた児の事故も報告されている。 そのような状況の中、一定の条件付きで医師・看護師以外の者による気管内吸引の実施が認められる方向に進んでいるが、気管内吸引の実施には、高いリスクがあるということも事実である。近年の気管内吸引技術に関する論文を見てみると、気管内吸引自体の手順や方法の相違から生じるリスクに関して分析した文献はほとんど見当たらない。そのため本調査では、アクティビティ図を用いて気管内吸引技術を可視化し、気管内吸引技術の類似点・相違点について比較した。その結果、3つの気管内吸引方法に共通するリスクと各方法に特異的なリスクがあった。

Quantitative evaluation of expression difference in report assignments between nursing and radiologic technology departments
Naoki Nishimoto, Yuki Yokooka, Ayako Yagahara, Masahito Uesugi, Katsuhiko Ogasawara
Radiological Physics and Technology, 4, 1, 29, 36, Jan. 2011, [Last author, Corresponding author]
English, Scientific journal

Willingness to pay for municipality hospital services in rural Japan: A contingent valuation study
Takayoshi Terashita, Hiroshi Muto, Toshihito Nakamura, Katsuhiko Ogasawara, Masaji Maezawa
BMC Research Notes, 4, 10.1186/1756-0500-4-177, 2011
English, Scientific journal

Quantitative analysis of ontology research articles in the radiologic domain
Naoki Nishimoto, Ayako Yagahara, Yuki Yokooka, Shintaro Tsuji, Masahito Uesugi, Katsuhiko Ogasawara, Masaji Maezawa
Radiological Physics and Technology, 3, 2, 171, 177, Jul. 2010, [Peer-reviewed]
English, Scientific journal

小児の初期救急医療における遠隔コンサルテーション利用の支払意思額－仮想評価法(CVM)による保護者を対象とした意識調査－
谷川 琢海, 大場 久照, 小笠原 克彦, 櫻井 恒太郎
日本医療・病院管理学会誌, 47, 2, 25, 36, (一社)日本医療・病院管理学会, 2010
Japanese, 時間外診療を含む小児初期救急医療に対して、遠隔医療システムを導入することに対する地域住民の需要を明らかにすることを目的に、子供の保護者を対象に仮想評価法(CVM)を適用したアンケート調査を行い、遠隔医療システムを利用する場合の支払意思額(WTP)の評価を行った。アンケート調査は、北海道の岩見沢市と南富良野町で実施した。幼稚園と保育所に通う3歳から5歳までの子供のいる503世帯の保護者を対象とした。医療資源への移動距離によるWTPの有意差は認めず、遠隔コンサルテーションシステムの需要が医療機関までの距離に依存しないことが示唆された。回答者属性による比較では、子供の人数が1人の群、所得の多い群、遠隔医療の知識がある群においてWTPが高い傾向が示唆された。

A Survey of Medical Information Education in Radiological Technology Schools
大場久照, 小笠原克彦, 星野修平, 細羽実, 奥田保男, 小西康彦, 池田龍二
Japanese Journal of Radiological Technology, 66, 8, 911, 916, Japanese Society of Radiological Technology, 2010
Japanese, The purpose of this study was to clarify actual conditions and problems in medical information education and to propose the educational concept to be adopted in medical information. A questionnaire survey was carried out by the anonymous method in June 2008. The survey was intended for 40 radiological technology schools. The questionnaire items were as follows: (1) educational environment in medical information education, (2) content of a lecture in medical information, (3) problems in medical information education. The response rate was 55.0% (22 schools). Half of the responding schools had a laboratory on medical information. Seventeen schools had a medical information education facility, and out of them, approximately 50% had an educational medical information system. The main problems of the medical information education were as follows: (a) motivation of the students is low, (b) the educational coverage and level for medical information are uncertain, (c) there are not an appropriate textbook and educational guidance. In conclusion, these findings suggest that it is necessary to have a vision of medical information education in the education of radiological technologists.

放射線技術者のための医用言語処理入門-part 4-(用語解説)
西本 尚樹, 上杉 正人, 櫻井 恒太郎, 小笠原 克彦
日本放射線技術学会医療情報分科会雑誌, 12, 77, 82, 公益社団法人 日本放射線技術学会, 2009
Japanese

Changing Trends in Birthday Preference: Long-Range Data Analysis of Several Specific Days Registered in Hospital Information Systems
Takumi Tanikawa, Katsuhiko Ogasawara, Tsunetaro Sakurai
Japan Journal of Medical Informatics, 28, 6, 319, 327, Japan Association for Medical Informatics, 2009
Japanese, The purpose of this study was to clarify the factors related to the deviation of the birth dates in Japan. The deviation of birth dates for several specific days was analyzed by some 580,000 patient's birthday data registered in the hospital information system. We analyzed the deviation of the birth dates on the following specific days: (1) New Year's day and the first day of a month; (2) lucky and unlucky days based on the lunar calendar; and (3) weekends and holidays. In the past, the number of births on New Year's Day and the first day of a month were greater than the average day of the year. These deviations were disappeared at present. In recent years, there were few births on Saturdays and Sundays. The result of this study showed that the factitious reporting was caused to the deviation of the birth dates on the first half of the 20th century. Nowadays the obstetric interventions was affected the deviation of birth dates. It was concluded that the deviation of the number of births always reflected social factors.

一対比較法を用いた保護者の小児救急医療機関の選好度の分析
谷川琢海、大場久照、小笠原克彦、櫻井恒太郎
日本医療・病院管理学会誌, 46, 4, 231, 239, (一社)日本医療・病院管理学会, 2009
Japanese, 地域住民の小児救急医療施設の選好度を明らかにするため、一対比較法を用いたアンケート調査により病院の選択要因の重要度を評価した。子供が急病である時の病院の選択要因を七つ設定し、各二つの選択要因のうちどちらが、どれだけ重要であるか尋ねた。対象は幼稚園に通う子供の保護者とし、153部を配布して73通の有効回答を得た。その結果、保護者は小児救急医療機関を選択する際、小児科の医師がいることを他の要因と比較して重要であると考えていた。小児科までの移動距離を重要と考える傾向は弱かったが、医療機関の近隣に住む住民は小児科までの距離が遠くなることに対して抵抗感があることが示唆された。また安心感に関わる選択要因の重要度が高く、地域の小児科開業医や総合診療医との医療連携体制の構築など、保護者に安心感を提供する施策が必要と思われる。

北海道におけるドクターへリの費用効果分析の試み-外傷患者における救急車搬送された場合に仮定される死亡者定数を用いたシミュレーション　　　　　　　　　　　　　　　
日本医療・病院管理学会誌, 46, 241, 250, 2009, [Peer-reviewed]

Interpretive Structural Modeling(ISM法)による乳房撮影技術の構造化
工藤希美, 工藤希美, 黒蕨邦夫, 寺下貴美, 西本尚樹, 小笠原克彦
日本放射線技術学会雑誌, 65, 10, 1385, 1390, 2009, [Peer-reviewed]

Developing and Evaluating an Auto-retrieval Algorithm for Abbreviations in Academic Articles
WAKOH Michika, NISHIMOTO Naoki, UESUGI Masahito, TERASHITA Takayoshi, OGASAWARA Katsuhiko
Jpn. J. Radiol. Technol., 65, 8, 1025, 1031, Japanese Society of Radiological Technology, 2009, [Peer-reviewed]
Japanese, The purpose of this study was to develop an automated acquisition support for the semantics of abbreviations and evaluate its performance with respect to academic articles. Our goal was to support the maintenance of an institution-specific semantics inventory for abbreviations on a continuous basis. We retrieved articles from MEDLINE with the keyword "Liver [MeSH]," and 100 abstracts were randomly selected. Abbreviations and their full forms were retrieved using original Java software based on the following rules. (1) Searching the parentheses in the abstracts, the words inside the parentheses were retrieved as "INNER" and the words in front of the parentheses were retrieved as "OUTER." (2) Matching rules, such as whether the first characters of INNER and OUTER were the same. (3) If the words satisfied the conditions stated at (2), INNER was saved as the abbreviation and OUTER as the full form. Performance was manually evaluated by two graduate students and a radiologist. Of the 165 pairs of abbreviations and full forms that were obtained, 145 (87.9%) constituted correct matches.

放射線技術者のための医用言語処理入門(用語解説)
上杉 正人, 西本 尚樹, 櫻井 恒太郎, 小笠原 克彦
日本放射線技術学会医療情報分科会雑誌, 11, 71, 76, 公益社団法人 日本放射線技術学会, 2008
Japanese

医療技術者のための医用言語処理入門(用語解説)
西本 尚樹, 上杉 正人, 櫻井 恒太郎, 小笠原 克彦
日本放射線技術学会医療情報分科会雑誌, 10, 46, 52, 公益社団法人 日本放射線技術学会, 2008
Japanese

重力モデルによる患者受療動向の分析－北海道二次医療圏を対象とした５年間推移－
石塚 和也, 寺下 貴美, 大場 久照, 谷川 琢海, 小笠原 克彦
日本医療・病院管理学会誌, 45, 4, 43, 52, (一社)日本医療・病院管理学会, 2008, [Peer-reviewed]
Japanese, 患者の受療動向を二次医療圏の病院数および二次医療圏間の距離を用いた重力モデルにより説明できる。北海道における患者受療動向の変化、医療資源の適正配置のための計画・立案のために、二次医療圏21圏域を対象に平成12年と17年の分析結果を比較した。5年の間、主に道東地域の二次医療圏には変化がなく、入院・外来とも「需要が満たされておらず、移動を負担に感じる地域」に分類された。入院患者を対象とした分析では、上川北部、上川中部は「需要が満たされており、移動が負担にならない地域」から「その他の地域」に移行した。外来患者を対象とした分析では、宗谷、南渡島は「その他の地域」から「需要が満たされており、移動が負担にならない地域」に移行した。また、5年間の変化はベクトル図からも把握でき、道東地域はほとんど変化がなく、上川北部は入院・外来とも規模依存度係数・距離係数ともに悪化傾向に、北渡島檜山では外来において規模依存度係数・距離係数ともに改善傾向にあった。この研究により二次医療圏ごとの将来的な変化の可能性を視覚的に示すことができた。

移動選好指数を用いた受療動向の評価に関する基礎的研究
大場 久照, 谷川 琢海, 小笠原 克彦
日本医療・病院管理学会誌, 45, 4, 53, 64, (一社)日本医療・病院管理学会, 2008, [Peer-reviewed]
Japanese, 移動選好指数(MPI)を用い、北海道の二次医療圏21圏域を対象に、患者の受療動向に対する地域的な選好度を評価した。札幌圏では、入院での流出圏にMPIが100を越える医療圏はなかったが、流入圏では20医療圏中12医療圏でMPIが100を越えた。外来での流出圏は「南空知」1圏域のみであったが、流入圏は11医療圏で、近隣圏域だけでなく、「宗谷」「留萌」等、三次医療圏外のMPIも高かった。上川中部圏では、流出圏は、入院・外来とも「北空知」のMPIが高かった。流入圏は、入院・外来とも三次医療圏域でMPIが顕著に高かった。また、流出MPIと流出率とを比べると、選好度と流出圏が異なる結果となった。MPIにより、患者の特定の医療圏への選好度や患者移動圏を定量的に評価できた。新しい医療計画に沿った年齢階級別、疾患別・診療科別の評価も加え、MPIによる受療動向の分析手法確立の可能性が示唆された。

Comparsion with myocardial perfusion MRI and myocardial perfusion SPECT in the diagnostic performance of coronary artery disease : A meta-analysis
IWATA Kunihiro, KUBOTA Makoto, OGASAWARA Katsuhiko
Jpn. J. Radiol. Technol., 64, 2, 251, 258, Japanese Society of Radiological Technology (JSRT), 2008
Japanese, We compared the diagnostic abilities of stress myocardial perfusion MRI (myocardial perfusion MRI) and myocardial perfusion SPECT, using a meta-analysis method. We investigated the diagnostic abilities of MRI and SPECT in similar subject groups in reports written in English or Japanese. The reports to be used for analysis were selected according to a "screening standard," which was established in advance. After consolidating the data from the selected reports, we compared (1) the integrated odds ratio, (2) the point estimation values of sensibility/specificity, and (3) the summary ROC curve. For the analysis, six reports were selected (subjects: 153, coronary-artery target sites: 447). Meta-analysis revealed that the diagnostic ability of myocardial perfusion MRI was superior to that of myocardial perfusion SPECT regarding each of the parameters (1)-(3). This is considered to be supportive evidence of the usefulness of myocardial perfusion MRI. (Article in Japanese)

Evaluation Factors for CR System Introduction Using AHP and Simulation
YOKOOKA Yuki, OGASAWARA Katsuhiko
Jpn. J. Radiol. Technol., 64, 9, 1167, 1171, Japanese Society of Radiological Technology (JSRT), 2008
Japanese, Medical institutions usually find it difficult to select computed radiography (CR) equipment because of the involvement of many complicated factors such as operability, processing time, and price. The analytic hierarchy process (AHP) is often applied in complex decision and evaluation situations. This study quantitatively evaluates the institution's selection criteria of equipment using AHP. The AHP model of this study consisted of 3 levels: the goal, 6 evaluations, and 3 alternatives. Processing time, price operability, picture quality, connectivity, and equipment size were considered as the criteria for decision marking. We simulated alteration of priority of evaluations by changing the weight of pricing between 0 and 1. Results showed that price and connectivity accounted for 60% of the total weight. On excluding operability, the difference in weight between equipment was 1.16 times; the priority of processing time was 1.36 times; and the priority of price was 1.37 times. In the same way, when considering operability, the difference in weight between equipment was 0.36 times, the priority of processing time was 0.45 times, and the priority of price was 0.11 times.

Pilot Study of Domain-specific Terminology Adaptation for Morphological Analysis : Research on Unknown Terms in National Examination Documents of Radiological Technologists
TSUJI Shintarou, NISHIMOTO Naoki, OGASAWARA Katsuhiko
Jpn. J. Radiol. Technol., 64, 7, 791, 794, Japanese Society of Radiological Technology (JSRT), 2008
Japanese, Although large medical texts are stored in electronic format, they are seldom reused because of the difficulty of processing narrative texts by computer. Morphological analysis is a key technology for extracting medical terms correctly and automatically. This process parses a sentence into its smallest unit, the morpheme. Phrases consisting of two or more technical terms, however, cause morphological analysis software to fail in parsing the sentence and output unprocessed terms as "unknown words." The purpose of this study was to reduce the number of unknown words in medical narrative text processing. The results of parsing the text with additional dictionaries were compared with the analysis of the number of unknown words in the national examination for radiologists. The ratio of unknown words was reduced 1.0% to 0.36% by adding terminologies of radiological technology, MeSH, and ICD-10 labels. The terminology of radiological technology was the most effective resource, being reduced by 0.62%. This result clearly showed the necessity of additional dictionary selection and trends in unknown words. The potential for this investigation is to make available a large body of clinical information that would otherwise be inaccessible for applications other than manual health care review by personnel.

Development of a Medical-text Parsing Algorithm Based on Character Adjacent Probability Distribution for Japanese Radiology Reports
N. Nishimoto, S. Terae, M. Uesugi, K. Ogasawara, T. Sakurai
METHODS OF INFORMATION IN MEDICINE, 47, 6, 513, 521, 2008
English, Scientific journal

医療技術者のための医用言語処理入門(用語解説)
西本 尚樹, 上杉 正人, 櫻井 恒太郎, 小笠原 克彦
日本放射線技術学会医療情報分科会雑誌, 9, 59, 67, 公益社団法人 日本放射線技術学会, 2007
Japanese

Evaluation of Time Study Analysis by Segment Time Series Analysis using Maximum Entropy Method
TERASHITA T, SATOH H, ENDOH A, ISHII H, UESUGI M, NISHIMOTO N, TANIKAWA T, SON Q, OGASAWARA K, SAKURAI T
Japan Journal of Medical Informatics, 25, 3, 289, 296, Japan Association for Medical Informatics, 2007
Japanese, In our previous study, we applied frequency analysis on the sequential time study data of nurses in a busy in-patient ward, in order to extract periodic feature of the nursing service. In this paper, we prepared and analyzed a pair of simulated data of time study, in which either continuous or fragmented work schedule are assigned. Comparison of these simulated data with a pair of actual data, taken before and after the change of work schedule, was performed to examine whether the effect of the schedule change could be recognized and evaluated by the analysis. The simulated data was generated based on the total amount of classified items observed in the actual time study. The segment time series analysis was performed at the range of segment time series of 24hours and the shift of segment time of one hour for two days. The maximum entropy method (MEM) was used to calculate the power spectrum. The result of segment time series analysis of the simulated data featured a short cycle area and a medium to long cycle area. In the short cycle area, detailed variation of the cycle was clearly recognized, while the long term trend appeared in the medium to long cycle area. It is expected that the analysis of simulated data provides the visual assessment of the change of cycles of nursing service when applied to the data of actual time studies before and after the change of work schedule, as reported in our previous work. The simulation data analysis may be applied to evaluate the effect of other causes of interest.

An ontological approach to support the description of nursing practice in Japan with the ICNP
Guoqian Jiang, Hitomi Sato, Akira Endoh, Katsuhiko Ogasawara, Tsunetaro Sakurai
INTERNATIONAL JOURNAL OF MEDICAL INFORMATICS, 76, 1, 55, 65, Jan. 2007
English, Scientific journal

Cost-utility of living donor liver transplantation in a single Japanese center
Kozo Ishida, Hirohisa Imai, Katsuhiko Ogasawara, Kuniko Hagiwara, Satoru Todo, Hiroyuki Furukawa, Hiroyoshi Fujita, Tsunetaro Sakurai, Hiko Tamashiro
HEPATO-GASTROENTEROLOGY, 53, 70, 588, 591, Jul. 2006
English, Scientific journal

Survey and Analysis of Radiation Safety Management Systems at Medical Institutions : Second Report : Radiation Measurement, Calibration of Radiation Survey Meters, and Periodic Check of Installations, Equipment, and Protection Instruments
OHBA HISATERU, OGASAWARA KATSUHIKO, ABURANO TAMIO
Jpn. J. Radiol. Technol., 62, 1, 86, 94, Japanese Society of Radiological Technology (JSRT), 2006
Japanese, We carried out a questionnaire survey to determine the actual situation of radiation safety management measures in all medical institutions in Japan that had nuclear medicine facilities. The questionnaire consisted of questions concerning the evaluation of shielding capacity; radiation measurement; periodic checks of installations, equipment, and protection instruments; and the calibration of radiation survey meters. The analysis was undertaken according to region, type of establishment, and number of beds. The overall response rate was 60 percent. For the evaluation of shielding capacity, the outsourcing rate was 53 percent of the total. For the radiation measurements of "leakage radiation dose and radioactive contamination" and "contamination of radioactive substances in the air," the outsourcing rates were 28 percent and 35 percent of the total, respectively (p<0.001, according to region and establishment). For the periodic check of radiation protection instruments, the implementation rate was 98 percent, and the outsourcing rate was 32 percent for radiation survey meters and 47 percent for lead aprons. The non-implemented rate for calibration of radiation survey meters was 25 percent of the total (p<0.001, according to region and establishment). The outsourcing rate for calibration of radiation survey meters accounted for 87 percent of the total, and of these medical institutions, 72 percent undertook annual calibration. The implementation rate for patient exposure measurement was 20 percent of the total (p<0.001, according to number of beds), and of these medical institutions 46 percent recorded measurement outcome.

Development and Spatial Analysis of Patient Trip Model using Spatial Interaction Model and Geographic Information System(GIS) : For Introducing Telemedicine in Hokkaido
OHBA H, OGASAWARA K, TANIKAWA T, SAKURAI T
Japan Journal of Medical Informatics, 25, 5, 309, 321, Japan Association for Medical Informatics, 2006
Japanese, The purpose of this study is to clarify the precedence of secondary medical service areas(SMSAs) in Hokkaido that should introduce telemedicine. A patient trip model was developed based on the production-constrained model which is a family of spatial interaction models and a spatial analysis of patient trip was taken using geographic information system(GIS). The patient trip data were obtained from a report named "survey results of patient trip of National Health Insurance patients in Hokkaido in May 2000". The number of patients was 79,458 for inpatient and 1,402,231 for outpatient. The attraction parameter β based on number of hospitals in SMSA and the distance parameter γ were calculated by the multiple regression analysis, respectively. Four kinds of patient trip patterns were formed by mean values of above two parameters of all areas in Hokkaido. The patterns were shown on GIS with traffic networks and geographic features. As the results, adjusted R² of the model were high(0.754 for inpatient and 0.819 for outpatient), indicating that the patient trip in Hokkaido could be explained well by the number of hospitals in each SMSA and the distance among the SMSAs. In addition, it became clear that most of the SMSAs which had high precedence of introducing telemedicine were distributed in eastern areas of Hokkaido.

ミニ・サム型施設配置モデルを用いた救急医療器官の最適配置の分析－北海道の小児急病センターの配置を事例として
谷川琢海, 小笠原克彦, 大場久照, 櫻井恒太郎
病院管理, 43, 3, 249, 260, (一社)日本医療・病院管理学会, 2006
Japanese, 患者となる小児人口と移動距離を用いて小児急病センターの適切な数と配置を明らかにする目的で,オペレーションズ・リサーチ手法であるミニ・サム型施設配置モデルを適用して分析を行った.北海道を対象地域として一次医療圏(212市町村)を単位とした場合に患者の居住地から施設までの総移動距離が最小となるような施設の配置場所と各施設が受け持つ圏域を求めた.現在の三次医療圏の中心となる市(6ヶ所)に施設を配置した場合と現在の二次医療圏の中心となる市町(21ヶ所)に施設を配置した場合の妥当性及び施設の総数を変化させた場合の数と配置の関係について検討した.その結果,現在の医療圏の設定に基づいた小児急病医療体制の構築は患者の移動負担の観点から妥当でないことが示唆された.以上より,今後の小児の医療計画の構築に際しては,小児に特化した圏域の設定が必要であることが示唆され,平均移動距離,最大移動距離,各施設の受け持つ小児人口が施設を配置するため重要な指標となるものと考えられた

Extraction of specific nursing terms using corpora comparison.
Guoqian Jiang, Hitomi Sato, Akira Endoh, Katsuhiko Ogasawara, Tsunetaro Sakurai
AMIA ... Annual Symposium proceedings / AMIA Symposium. AMIA Symposium, 997, 2005
English, Scientific journal

CＴ画像診断レポートに出現する複合語の意味的な分布の調査　　　　　　　　　　　　　　　
医療情報学, 25, 413, 420, 2005

医療情報学受講前の情報リテラシーの学科間相違に関する考察－医学科・看護学科・診療放射線技術学科学生を対象とした7年間の継続調査結果
小笠原克彦
医療情報学, 25, 1, 7, 13, 2005

Survey and Analysis of Radiation Safety Management Systems at Medical Institutions : Initial Report : Radiation Protection Supervisor, Radiation Safety Organization, and Education and Training
OHBA HISATERU, OGASAWARA KATSUHIKO, ABURANO TAMIO
Japanese Journal of Radiological Technology, 61, 11, 1542, 1550, Japanese Society of Radiological Technology, 2005
Japanese, In this study, a questionnaire survey was carried out to determine the actual situation of radiation safety management systems in Japanese medical institutions with nuclear medicine facilities. The questionnaire consisted of questions concerning the Radiation Protection Supervisor license, safety management organizations, and problems related to education and training in safety management. Analysis was conducted according to region, type of establishment, and number of beds. The overall response rate was 60%, and no significant difference in response rate was found among regions. Medical institutions that performed nuclear medicine practices without a radiologist participating accounted for 10% of the total. Medical institutions where nurses gave patients intravenous injections of radiopharmaceuticals as part of the nuclear medicine practices accounted for 28% of the total. Of these medical institutions, 59% provided education and training in safety management for nurses. The rate of acquisition of Radiation Protection Supervisor licenses was approximately 70% for radiological technologists and approximately 20% for physicians (regional difference, p=0.02). The rate of medical institutions with safety management organizations was 71% of the total. Among the medical institutions (n=208) without safety management organizations, approximately 56% had 300 beds or fewer. In addition, it became clear that 35% of quasi-public organizations and 44% of private organizations did not provide education and training in safety management (p<0.001, according to establishment).

肝臓移植の医療経済学評価における文献的考察
日本公衆衛生雑誌, 51, 233, 239, 2004

Development of a Radioactive Pharmaceuticals Management System Using a Web-based System
TERASHITA TAKAYOSHI, NAKABA TAKANORI, FUSE YOSHIHIRO, OGASAWARA KATSUHIKO
Japanese Journal of Radiological Technology, 60, 6, 811, 817, Japanese Society of Radiological Technology, 2004
Japanese, Systems for recording data on radiopharmaceuticals have changed following the Medical Care Law on concentration limits of radioisotopes in drainage, exhaust gas, and the atmosphere. A Web-based system that includes a patient information subsystem, DICOM imaging subsystem, and laboratory order subsystem has been developed for the receipt, use, stock prescription, disposal, and accounting of radiopharmaceuticals was developed using a Web-based system in order to simplify radiation safety management operations such as changes and additions to record book forms. In verifying the usefulness of the system and its recording and search times, it was found that the new Web-based system provides superior performance.

Radiological equipment and staffs distribution in Hokkaido, Japan--Lorenz curve and Locational Gini Index analyses
小笠原 克彦, 南部 敏和, 桜井 恒太郎
Japanese journal of health economics & policy, 14, 17, 26, 医療経済研究機構, 2004
English

Survey and Analysis of Radiation Safety Education at Radiological Technology Schools
OHBA HISATERU, OGASAWARA KATSUHIKO, ABURANO TAMIO
Japanese Journal of Radiological Technology, 60, 10, 1415, 1423, Japanese Society of Radiological Technology, 2004
Japanese, We carried out a questionnaire survey of all radiological technology schools, to investigate the status of radiation safety education. The questionnaire consisted of questions concerning full-time teachers, measures being taken for the Radiation Protection Supervisor Qualifying Examination, equipment available for radiation safety education, radiation safety education for other departments, curriculum of radiation safety education, and related problems. The returned questionnaires were analyzed according to different groups categorized by form of education and type of establishment. The overall response rate was 55%, and there were statistically significant differences in the response rates among the different forms of education. No statistically significant differences were found in the items relating to full-time teachers, measures for Radiation Protection Supervisor Qualifying Examination, and radiation safety education for other departments, either for the form of education or type of establishment. Queries on the equipment used for radiation safety education revealed a statistically significant difference in unsealed radioisotope institutes among the forms of education. In terms of curriculum, the percentage of radiological technology schools which dealt with neither the shielding calculation method for radiation facilities nor with the control of medical waste was found to be approximately 10%. Other educational problems that were indicated included shortages of full-time teachers and equipment for radiation safety education. In the future, in order to improve radiation safety education at radiological technology schools, we consider it necessary to develop unsealed radioisotope institutes, to appoint more full-time teachers, and to educate students about risk communication.

ストマップ理解のためのトレーニング用胃ファントム
西本 尚樹, 堀田 賢治, 細井 智宏, 小笠原 克彦
日本放射線技術学会雑誌, 59, 10, 1303, 1308, (公社)日本放射線技術学会, Oct. 2003
Japanese, 胃の三次元的な解剖の理解を向上させることを目的として,ストマップを展開した安価で簡便なトレーニング用胃ファントムを開発した.ストマップを展開した胃ファントムが,材料費のみでおよそ1万円,製作期間は35時間程度と簡便に製作することが可能であった.胃バリウム撮影の経験が殆どない学生を対象とした評価実験の結果,ストマップを展開した胃ファントムを使用することにより,胃の解剖の立体的な把握を促すことが可能であった.胃ファントムにストマップを展開する際,線の太さや材質の選択,接着する時期の検討の必要性が明らかになった

Context-based ontology building support in clinical domains using format concept analysis
GQ Jiang, K Ogasawara, A Endoh, T Sakurai
INTERNATIONAL JOURNAL OF MEDICAL INFORMATICS, 71, 1, 71, 81, Aug. 2003
English, Scientific journal

Clinicians' perceptions and the relevant computer-based information needs towards the practice of evidence based medicine.
Guoqian Jiang, Katsuhiko Ogasawara, Akira Endoh, Tsunetaro Sakurai
AMIA ... Annual Symposium proceedings / AMIA Symposium. AMIA Symposium, 882, 2003
English, Scientific journal

簡易型動画像伝送システム実用化の検討2－患家での使用に関する評価－　　　　　　　　　　　　　　　
北海道リハビリテーション学会雑誌, 31, 97, 101, 2003

簡易型動画像伝送システム実用化の検討1－システム構築と基本性能評価－　　　　　　　　　　　　　　　
北海道リハビリテーション学会雑誌, 31, 91, 96, 2003

Preliminary clinical evaluation of a video transmission system for home visits
K Ogasawara, K Ito, GQ Jiang, A Endoh, T Sakurai, H Sato, Y Okuhara, T Adachi, K Hori
JOURNAL OF TELEMEDICINE AND TELECARE, 9, 5, 292, 295, 2003
English, Scientific journal

Questionnaire Survey on Teleradiology for Radiological Technologists : Analyses by Age Group and Facility Type in Hokkaido
OGASAWARA KATSUHIKO
Japanese Journal of Radiological Technology, 59, 9, 1147, 1154, Japanese Society of Radiological Technology, 2003
Japanese, A questionnaire survey was given to 1,951 radiological technologists in Hokkaido to examine their views on teleradiology. The questionnaire consisted of questions about their understanding of teleradiology and interest in it as well as examining the need for teleradiology and problems with it. A total of 1,275 radiological technologists responded to the survey, a response rate of 65.4%. The returned questionnaires were analyzed according to different groups categorized by age of the radiological technologists and type of medical facility. Almost all radiological technologists knew about teleradiology. Among the different age groups, the higher age groups showed greater recognition and understanding of teleradiology. About 60% of radiological technologists were interested in teleradiology (no significant differences among age groups). When it was assumed that a teleradiology system would be introduced, (1) the working load for radiological technologists was estimated to be about 17,820(±24,233)yen per month. (2) Sixty percent of the respondents considered that the system should be used for the reading and diagnosis of difficult cases. (3) Fifty percent of them thought that the system should be managed and operated by radiological technologists. (4) Many radiological technologists pointed out problems concerning initial costs and the facility's management system.

病変の立体的位置把握のための胃ファントムの開発
日本放射線技術学会雑誌, 59, 1303, 1308, 2003

撮影技術学実習に取り入れた高齢者・片麻痺疑似体験の教育効果
日本放射線技術学会雑誌, 59, 295, 301, 2003

Interpretive Structural Modeling for introducing of image information system at the middle-scale hospitals.
Katsuhiko Ogasawara, Hiroko Yamashina, Tomoko Kamiya, Guoqian Jiang, Tsunetaro Sakurai
AMIA 2003(AMIA), AMIA, 2003
International conference proceedings

Comparison of computer-based information support to clinical research in chinese and Japanese hospitals: A postal survey of clinicians' views
G Jiang, K Ogasawara, A Endoh, T Sakurai
METHODS OF INFORMATION IN MEDICINE, 41, 2, 141, 146, 2002
English, Scientific journal

What do radiographers think about teleradiology in Japan?
K Ogasawara, A Endoh, T Sakurai
JOURNAL OF TELEMEDICINE AND TELECARE, 7, 3, 161, 166, 2001
English, Scientific journal

A Numerical Model for Compressed Breast of Japanese Women in Mammography
OGASAWARA Katsuhiko, DATE Hiroyuki
Japanese Journal of Medical Physics, 21, 4, 215, 222, Japan Society of Medical Physics, 2001
English, The purpose of this study is to develop a numerical model for compressed breast of Japanese women which can evaluate the radiation dose in mammography. The model should take account of the average data for thickness of the compressed breast, and area, height and width of the mammograms. The compressed breast thickness is typically 4.4 to 6.4cm for European and American women, whereas it is under 3.8cm for Japanese women. Therefore, applying the European and American models without any modification for Japanese women would result in an overestimation of the absorbed dose. The data of 560 mammograms were analyzed focusing on the size and geometry of the projected images (cranio-caudal) to formulate a compressed breast phantom. An extremely good linear coefficient of correlation (0.98) between the area and the product of the width and height of the projected images was found. A numerical model describing a part of a simple elliptic column was constructed from this relationship and the averaged thickness (3.15cm) of the compressed breast. This model will lead to a realistic estimation of the total volumetric absorbed dose in mammography.

Small-Group Survey of Patient Services in Hygiene and Public Health
OGASAWARA Katsuhiko, ENDO Akira, SATO Hitomi, TERAE Satoshi, SAKURAI Tsunetaro
医学教育, 31, 1, 23, 28, 日本医学教育学会, 2000
Japanese

ホームページによる市民向けHIV/AIDS診療・療養情報の提供の試み　　　　　　　　　　　　　　　
医療情報学, 20, 55, 60, 2000

Problem-solving Group Learning for Radiological Technologists in Training
OGASAWARA KATSUHIKO, ENDOH AKIRA, DATE HIROYUKI, SAKURAI TSUNETARO, SHIMOZUMA MITSUO
Japanese Journal of Radiological Technology, 56, 4, 596, 604, Japanese Society of Radiological Technology, 2000
English, The importance of informatics in the education of medical and nursing students has been widely recognized in recent years, and many curricula in information literacy have been proposed. Students of radiological technology, as well as other medical students, need these curricula. We had the opportunity to teach "Practice in Radiation Protection" to junior and senior students, and to use problem-solving group learning. This course consisted of 13 sessions. The contents included introductory lectures on informatics, the critical reading of an epidemiological paper written in English, and a problem-solving exercise carried out in a small group setting. In the exercise, students chose one theme related to medical informatics, health science, or radiation protection. After collecting information on this theme, they presented a report to the class. A questionnaire given to students after the course work had finished pointed to certain problems. These problems included difficulty in being able to read the English paper, group work, and insufficient time for the exercise. Ninety-percent of the students reported that they had gained a positive attitude toward problem solving as a result of the exercise.

消化器検診施設における画像情報保管に関する一考察－フィルム保管と電子媒体保管の比較
小笠原 克彦, 安藤 裕, 斎藤 正道, 板垣 佑司, 渡辺 一知, 遠藤 晃, 櫻井 恒太郎
日本総合健診医学会会誌, 27, 4, 409, 414, 2000

Experience of telemedicine and information network system at Hokkaido University Hospital
T. Sakurai, A. Endoh, K. Ogasawara, H. Satho
[Hokkaido igaku zasshi] The Hokkaido journal of medical science, 74, 4, 267, 272, 1999
Japanese, Scientific journal

新入生を対象とした問題解決型「情報管理学」の提案
小笠原克彦
医療情報学, 19, 1, 19, 26, 1999

Evaluation of Barium Meals for Mass-screening and Choice Criteria Using the Analytic Hierachy Process
OGASAWARA KATSUHIKO, TAKAHASHI HIDEKI, HIRAKAWA MASASHI, SAITOH MASAMICHI
Japanese Journal of Radiological Technology, 55, 4, 392, 396, Japanese Society of Radiological Technology, 1999
English

Hard-copy(film)versus Soft-copy(CRT) Reading Performance between Compressed and Uncompressed Images: SOLs in abdominal CT images
Maeda Tomoho, Kinosada Yasutomi, Ogasawara Katsuhiko, Kubo Atsushi, Kunieda Etsuo, Kitamura Masayuki, Kawaguchi Osamu, Tsukamoto Nobuhiro, Ando Yutaka, Kozuka Takahiro
日本医学放射線学会雑誌, 59, 11, 521, 525, 日本医学放射線学会, 1999
Japanese

Simultaneous acquisition of iodine-123 emission and technetium-99m transmission data for quantitative brain single-photon emission tomographic imaging
Katsuhiko Ogasawara, Jun Hashimoto, Koichi Ogawa, Atsushi Kubo, Nobutoku Motomura, Hyoji Hasegawa, Takashi Ichihara
European Journal of Nuclear Medicine, 25, 11, 1537, 1544, 1998
English, Scientific journal

Scatter and attenuation correction for quantitative myocardial SPECT imaging
Jun Hashimoto, Toshikazu Sammiya, Katsuhiko Ogasawara, Atsushi Kubo, Koichi Ogawa, Takashi Ichihara, Nobutoku Motomura, Hyoji Hasegawa
Kakuigaku, 33, 9, 1015, 1019, 1996
Japanese, Scientific journal

第3回北海道大学医療AIシンポジウム開催報告—Event Report of 3rd Hokkaido University Medical AI Symposium
唐 明輝, 佐藤 夏季, 平田 健司, 杉森 博行, 吉村 高明, 尾藤 良孝, 小笠原 克彦, 工藤 與亮, 北海道放射線医学雑誌 = Hokkaido Journal of Radiology, 5, 31, 35, Mar. 2025
[札幌] : 北海道放射線医学雑誌, Japanese

Co-occurrence Network Analysis of Tweets on Breast Cancer Screening : Challenges for Utilizing SNS for Information Dissemination and Improving Screening Rates
山品博子, 山品博子, Zhang Hongjian, 小笠原克彦, 日本乳癌検診学会誌(Web), 34, 1, 2025

第2回北海道大学医療AIシンポジウム開催報告—Event Report of 2nd Hokkaido University Medical AI Symposium
唐 明輝, 平田 健司, 佐藤 夏季, 杉森 博行, 吉村 高明, 小笠原 克彦, 中谷 純, 工藤 與亮, 北海道放射線医学雑誌 = Hokkaido Journal of Radiology, 4, 30, 32, Mar. 2024
[札幌] : 北海道放射線医学雑誌, Japanese

Interpretive Structure Modeling(ISM)による看護DX推進の阻害要因の分析および提案
杉村直孝, 栗原知己, 栗原知己, 鵜飼真千子, 大橋和貴, 平田健司, 小笠原克彦, 日本医療情報学会看護学術大会論文集, 25th, 2024

膀胱癌術後患者における日本語版Body Image Scaleの信頼性と妥当性の検証
樋口 まどか, 佐藤 三穂, 大澤 崇宏, 山田 修平, 宮田 遥, 松本 隆児, 田中 博, 佐々木 芳浩, 森田 研, 原林 透, 柏木 明, 村井 祥代, 安部 崇重, 小笠原 克彦, 篠原 信雄, 泌尿器外科, 36, 臨増, 886, 886, Aug. 2023
医学図書出版(株), Japanese

【医療AIの普及拡大とさらなる展開 医療からヘルスケアサービスまで発展に向けた現状と展望】医療AIのための人材育成の現状と展望 北海道大学における医療AI開発者育成プログラムの活動と展望　　　　　　　　　　　　　　　
唐 明輝, 平田 健司, 杉森 博行, 吉村 高明, 小笠原 克彦, 中谷 純, 工藤 與亮, INNERVISION, 38, 7, 19, 20, Jun. 2023
(株)インナービジョン, Japanese

日本語版Body Image Scaleの膀胱癌術後患者における信頼性・妥当性の検証
樋口 まどか, 佐藤 三穂, 大澤 崇宏, 山田 修平, 宮田 遥, 菊地 央, 松本 隆児, 三浪 圭太, 田中 博, 佐々木 芳浩, 森田 研, 高田 徳容, 原林 透, 古御堂 純, 柏木 明, 村井 祥代, 安部 崇重, 小笠原 克彦, 篠原 信雄, 泌尿器外科, 36, 5, 417, 417, May 2023
医学図書出版(株), Japanese

第1回北海道大学医療AIシンポジウム開催報告—Event Report of 1st Hokkaido University Medical AI Symposium
唐 明輝, 平田 健司, 杉森 博行, 吉村 高明, 小笠原 克彦, 中谷 純, 工藤 與亮, 北海道放射線医学雑誌 = Hokkaido Journal of Radiology, 3, 41, 44, Mar. 2023
[札幌] : 北海道放射線医学雑誌, Japanese

Analyzing the Time Trend of Supply/demand of Rehabilitation Services Using NDB Open Data Japan
森井康博, 森井康博, 安彦かがり, 石川智基, 石川智基, 藤原健祐, 藤原健祐, 此村恵子, 小笠原克彦, 日本医療情報学会春季学術大会プログラム・抄録集, 27th, 2023

Analyzing Time Trend of Rehabilitation Service Provision Using NDB Open Data Japan-Including the First Year of COVID-19 Pandemic Period-
森井康博, 森井康博, 安彦かがり, 石川智基, 石川智基, 藤原健祐, 藤原健祐, 此村恵子, 小笠原克彦, 医療情報学連合大会論文集(CD-ROM), 43rd, 2023

北海道における訪問看護サービスの地理的アクセシビリティについて 在宅医療圏別の評価　　　　　　　　　　　　　　　
大橋 和貴, 藤原 健祐, 谷川 琢海, 坂東 恭平, 森井 康博, 小笠原 克彦, 医療情報学連合大会論文集, 42回, 771, 772, Nov. 2022
(一社)日本医療情報学会, Japanese

北海道における一次脳卒中センターの均てん化シミュレーション　　　　　　　　　　　　　　　
坂東 恭平, 大橋 和貴, 藤原 健祐, 谷川 琢海, 長内 俊也, 小笠原 克彦, 医療情報学連合大会論文集, 42回, 777, 778, Nov. 2022
(一社)日本医療情報学会, Japanese

急性期脳梗塞患者の搬送方法が治療へのアクセシビリティに及ぼす影響 地理情報システムを用いたシミュレーション　　　　　　　　　　　　　　　
森井 康博, 長内 俊也, 藤原 健祐, 高宮 宗一朗, 坂東 恭平, 谷川 琢海, 谷 祐児, 佐藤 広崇, 大橋 和貴, 石川 智基, 小笠原 克彦, 医療情報学連合大会論文集, 42回, 779, 780, Nov. 2022
(一社)日本医療情報学会, Japanese

The health economic effects of an imaging technology–based telemedicine system for rural neuro-emergency patient care
Hirotaka Sato, Manabu Kinoshita, Yuji Tani, Teruo Kimura, Toshiya Osanai, Hiroaki Osanai, Katsuhiko Ogasawara, Neurosurgical Focus, 52, 6, E2, E2, Jun. 2022, [International Magazine]
OBJECTIVE

“Join,” an imaging technology–based telemedicine system, allows simultaneous radiological information sharing between physically remote institutions, virtually connecting advanced medical institutions and rural hospitals. This study aimed to elucidate the health economics effect of Join for neurological telemedicine in rural areas in Hokkaido, Japan.

METHODS

Information concerning 189 requests for patient transfer from Furano Kyokai Hospital, a regional rural hospital, to Asahikawa Medical University Hospital (AMUH), an advanced academic medical institution, was retrospectively collected. The Join system was established between Furano Kyokai Hospital and AMUH in February 2019. Data collected from patients between April 2017 and December 2018 were included in the non-Join group, and those collected between February 2019 and October 2020 were included in the Join group. Clinical variables, reasons for patient transfer requests, duration of hospital stay, and medical costs per patient were analyzed between these two groups. Furthermore, clinical characteristics were compared between patients who were transferred and not transferred based on Join.

RESULTS

More patients were discharged < 7 days after transfer to AMUH in the non-Join group compared with the Join group (p = 0.02). When focusing on the Join group, more patients who were not transferred were discharged < 1 week (p < 0.01). On the other hand, more patients required surgery (p = 0.01) when transferred. The ratio of patients whose medical cost was < USD5000 substantially decreased, from 33% for the non-Join group to 13% for the Join group.

CONCLUSIONS

An imaging technology–based telemedicine system, Join, contributed to reducing unnecessary neuro-emergency patient transfer in a remote rural area, and telemedicine with an integrated smartphone system allowed medical personnel to effectively triage at a distance neuro-emergency patients requiring advanced tertiary care., Journal of Neurosurgery Publishing Group (JNSPG), English

演繹法と帰納法の視点から見た医療AI　　　　　　　　　　　　　　　
平田 健司, 杉森 博行, 唐 明輝, 中谷 純, 小笠原 克彦, 豊永 拓哉, 工藤 與亮, 北海道放射線医学雑誌, 2, 1, 6, Mar. 2022
(NPO)メディカルイメージラボ, Japanese

The optimal system to provide thrombectomy in consideration of the physician burden by the expansion of thrombectomy.
長内俊也, 大橋和貴, 坂東恭平, 森井康博, 藤原健祐, 谷川琢海, 小笠原克彦, 藤村幹, 脳血管内治療(Web), 7, Supplement, 2022

北海道における急性期脳梗塞治療の地理的アクセシビリティについて 2-step floating catchment area(2sFCA)法の有用性の検討　　　　　　　　　　　　　　　
坂東 恭平, 藤原 健祐, 谷川 琢海, 長内 俊也, 小笠原 克彦, 医療情報学連合大会論文集, 41回, 559, 560, Nov. 2021
(一社)日本医療情報学会, Japanese

NDBオープンデータを用いたリハビリ従事者需給に関する生態学的研究　　　　　　　　　　　　　　　
森井 康博, 石川 智基, 藤原 健祐, 此村 恵子, 小笠原 克彦, 医療情報学連合大会論文集, 41回, 1061, 1062, Nov. 2021
(一社)日本医療情報学会, Japanese

北海道における病院経営人材育成プログラムの必要性について 北海道大学病院経営アドミニストレーター育成拠点における取り組み　　　　　　　　　　　　　　　
青木 智大, 森井 康博, 椎名 希美, 石川 智基, 鈴木 哲平, 藤原 健祐, 谷 祐児, 小笠原 克彦, 医療情報学連合大会論文集, 41回, 1104, 1105, Nov. 2021
(一社)日本医療情報学会, Japanese

自治体による健康ポイント事業の効果検証および事業評価方法の検討 傾向スコアマッチングによる介護レセプト分析　　　　　　　　　　　　　　　
鈴木 哲平, 藤原 健祐, 永井 亘, 青山 毅, 榎本 尚志, 中田 駿太朗, 小笠原 克彦, 医療情報学連合大会論文集, 41回, 1153, 1154, Nov. 2021
(一社)日本医療情報学会, Japanese

北海道における急性期脳梗塞治療の地理的アクセシビリティについて 2-step floating catchment area(2sFCA)法の有用性の検討　　　　　　　　　　　　　　　
坂東 恭平, 藤原 健祐, 谷川 琢海, 長内 俊也, 小笠原 克彦, 医療情報学連合大会論文集, 41回, 559, 560, Nov. 2021
(一社)日本医療情報学会, Japanese

足底に対するキネシオロジーテーピングが高齢者の立位バランス機能に与える影響
寒川 美奈, 井野 拓実, 越野 裕太, 木田 貴英, 遠山 晴一, 鈴木 哲平, 小笠原 克彦, 日本未病学会雑誌, 27, 2, 29, 33, Aug. 2021
(一社)日本未病学会, Japanese

スタティックストレッチングが高齢者の姿勢制御に与える即時効果
岡 出海, 寒川 美奈, 大場 健裕, 萬井 太規, 鈴木 哲平, 小笠原 克彦, スポーツ理学療法学, 1, Supplement, OS-03-05, OS-03-05, 2021
一般社団法人 日本スポーツ理学療法学会, Japanese

自治体の特徴に合わせた特定健診受診率向上支援のための自治体グルーピングの試み　　　　　　　　　　　　　　　
森井 康博, 市村 剛一, 本間 達也, 浅倉 宏至, 柴山 渉, 椎名 希美, 中谷 純, 小笠原 克彦, 医療情報学連合大会論文集, 40回, 726, 727, Nov. 2020
(一社)日本医療情報学会, Japanese

北海道の市町村を対象とした特定健診受診率に寄与する要因に関する生態学的研究　　　　　　　　　　　　　　　
森井 康博, 市村 剛一, 本間 達也, 柴山 渉, 浅倉 宏至, 椎名 希美, 中谷 純, 小笠原 克彦, 日本医療・病院管理学会誌, 57, Suppl., 188, 188, Oct. 2020
(一社)日本医療・病院管理学会, Japanese

モーションキャプチャーシステムを用いたマンモグラフィ術者の動作解析　　　　　　　　　　　　　　　
川合 美帆, 谷川原 綾子, 山品 博子, 鈴木 哲平, 小笠原 克彦, 北海道放射線技術雑誌, 88, 70, 71, Apr. 2020
(公社)日本放射線技術学会-北海道支部, Japanese

感染症数理モデルを用いたCOVID-19院内感染発生時の感染拡大シミュレーションに関する検証
上田龍一郎, 後藤文徳, 北龍樹, 山品博子, 小笠原克彦, 医療情報学連合大会プログラム・抄録集, 40th, 2020

Analyzing Complication Costs of Laparoscopic Radical Cystectomy using DPC claim data
森井康博, 大澤崇宏, 原林透, 谷川琢海, 山品博子, 篠原信雄, 小笠原克彦, 日本医療情報学会春季学術大会プログラム・抄録集, 24th (Web), 2020

フラクタル次元に基づく腫瘤病変の位置検出
山品博子, 平木花奈, 鈴木隆介, 上杉正人, 小笠原克彦, 日本乳癌検診学会学術総会(CD-ROM), 30th, 2020

小児髄芽腫陽子線治療における放射線誘発性二次がんに伴う費用分析のための決定木モデルの構築
田森帆乃夏, 吉村高明, 森井康博, 小笠原克彦, 医療情報学連合大会プログラム・抄録集, 40th, 2020

Grouping of municipalities according to their characteristics related to the participation rate of specific health checkups
森井康博, 市村剛一, 本間達也, 浅倉宏至, 柴山渉, 椎名希美, 中谷純, 小笠原克彦, 医療情報学連合大会論文集(CD-ROM), 40th, 2020

Examination of factors associated with changes in HbA1c in the patients undergoing specific health checkups
浜館茉緒, 森井康博, 中谷純, 小笠原克彦, 医療情報学連合大会論文集(CD-ROM), 40th, 2020

特定健康診査における受診者のHbA1cの変化に関連する因子の検討
浜館茉緒, 森井康博, 中谷純, 小笠原克彦, 医療情報学連合大会プログラム・抄録集, 40th, 2020

集中指数(CI:Concentration Index)による中国における医療資源分布の評価
楊雨辰, 森井康博, 藤原健祐, 藤原健祐, 小笠原克彦, 医療情報学連合大会プログラム・抄録集, 40th, 2020

全国における急性期脳梗塞に対する血栓回収療法研修施設の地理的分布の評価
谷松子, 藤原健祐, 藤原健祐, 谷川琢海, 長内俊也, 小笠原克彦, 医療情報学連合大会プログラム・抄録集, 40th, 2020

Construction of a decision tree model for cost analysis associated with radiation-induced cancer in proton therapy for pediatric medulloblastoma
田森帆乃夏, 吉村高明, 森井康博, 小笠原克彦, 医療情報学連合大会論文集(CD-ROM), 40th, 2020

携帯端末を通して得られたCT画像を用いた画像分類の精度評価の検討　　　　　　　　　　　　　　　
曹 瀛丹, 杉森 博行, 小笠原 克彦, 医療情報学連合大会論文集, 39回, 788, 789, Nov. 2019
(一社)日本医療情報学会, Japanese

GISによる救急搬送シミュレーションの妥当性の検証　　　　　　　　　　　　　　　
谷 松子, 藤原 健祐, 上村 修二, 葛西 毅彦, 奈良 理, 森井 康博, 小笠原 克彦, 医療情報学連合大会論文集, 39回, 448, 448, Nov. 2019
(一社)日本医療情報学会, Japanese

中国における医療資源の省間分布から見る医療格差　　　　　　　　　　　　　　　
楊 雨辰, 森井 康博, 藤原 健祐, 石川 智基, 山品 博子, 鈴木 哲平, 中谷 純, 小笠原 克彦, 医療情報学連合大会論文集, 39回, 358, 359, Nov. 2019
(一社)日本医療情報学会, Japanese

モーションキャプチャーとタスクオントロジーを用いたマンモグラフィ撮影における暗黙知のモデル化　　　　　　　　　　　　　　　
谷川原 綾子, 井上 剛, 北川 剛, 山品 博子, 鈴木 哲平, 藤原 健祐, 小笠原 克彦, 医療情報学連合大会論文集, 39回, 404, 405, Nov. 2019
(一社)日本医療情報学会, Japanese

包絡分析法を用いた将来推計患者数に基づく医療資源の効率性評価　　　　　　　　　　　　　　　
谷川 琢海, 藤原 健祐, 西本 尚樹, 大場 久照, 小笠原 克彦, 医療情報学連合大会論文集, 39回, 199, 200, Nov. 2019
(一社)日本医療情報学会, Japanese

GISを用いた脳卒中診療拠点病院の適正配置モデルの検討　　　　　　　　　　　　　　　
森井 康博, 谷 松子, 谷川 琢海, 小笠原 克彦, 医療情報学連合大会論文集, 39回, 923, 924, Nov. 2019
(一社)日本医療情報学会, Japanese

アイトラッカーを用いた検診機関Webサイトの視線分析の試み 検診機関が届けたい情報と受診者の閲覧する情報の相違点　　　　　　　　　　　　　　　
鈴木 隆介, 藤田 奈穂, 鈴木 哲平, 黒蕨 邦夫, 小笠原 克彦, 医療情報学連合大会論文集, 39回, 270, 271, Nov. 2019
(一社)日本医療情報学会, Japanese

包絡分析法を用いた将来推計患者数に基づく医療資源の効率性評価　　　　　　　　　　　　　　　
谷川 琢海, 藤原 健祐, 西本 尚樹, 大場 久照, 小笠原 克彦, 医療情報学連合大会論文集, 39回, 256, 256, Nov. 2019
(一社)日本医療情報学会, Japanese

中国における医療資源の省間分布から見る医療格差　　　　　　　　　　　　　　　
楊 雨辰, 森井 康博, 藤原 健祐, 石川 智基, 山品 博子, 鈴木 哲平, 中谷 純, 小笠原 克彦, 医療情報学連合大会論文集, 39回, 297, 297, Nov. 2019
(一社)日本医療情報学会, Japanese

モーションキャプチャーとタスクオントロジーを用いたマンモグラフィ撮影における暗黙知のモデル化　　　　　　　　　　　　　　　
谷川原 綾子, 井上 剛, 北川 剛, 山品 博子, 鈴木 哲平, 藤原 健祐, 小笠原 克彦, 医療情報学連合大会論文集, 39回, 307, 307, Nov. 2019
(一社)日本医療情報学会, Japanese

GISを用いた脳卒中診療拠点病院の適正配置モデルの検討　　　　　　　　　　　　　　　
藤原 健祐, 長内 俊也, 森井 康博, 谷 松子, 谷川 琢海, 小笠原 克彦, 医療情報学連合大会論文集, 39回, 447, 447, Nov. 2019
(一社)日本医療情報学会, Japanese

北海道での理想的な血栓回収療法提供体制の確立に向けた取り組み　　　　　　　　　　　　　　　
長内 俊也, 東海林 菊太郎, 今井 哲秋, 寳金 清博, 小笠原 克彦, 脳血管内治療, 4, Suppl., S160, S160, Nov. 2019, [Peer-reviewed]
(NPO)日本脳神経血管内治療学会, Japanese

北海道大学病院経営アドミニストレーター育成拠点における取り組み
小笠原克彦, 藤原健祐, 森井康博, 石川智基, 鈴木哲平, 谷祐児, 日本医療・病院管理学会誌, 56, Suppl., 153, 153, Oct. 2019
(一社)日本医療・病院管理学会, Japanese

地域居住高齢者の視知覚機能、認知機能と作業遂行状態の関連　　　　　　　　　　　　　　　
井上 貴雄, 高島 理沙, 鈴木 哲平, 水口 寛彦, 小笠原 克彦, 日本作業療法学会抄録集, 53回, PN, 2C08, Sep. 2019
(一社)日本作業療法士協会, Japanese

包絡分析法を用いた都道府県ごとの放射線医療資源分布の効率性分析　　　　　　　　　　　　　　　
谷川 琢海, 藤原 健祐, 石川 智基, 小笠原 克彦, 日本放射線技術学会雑誌, 75, 9, 999, 999, Sep. 2019
(公社)日本放射線技術学会, Japanese

Healthcare Disparities in China: An Assessment of the Distribution of Healthcare Resources
YANG Yuchen, 森井康博, 藤原健祐, 石川智基, 石川智基, 山品博子, 鈴木哲平, 鈴木哲平, 中谷純, 小笠原克彦, 医療情報学連合大会論文集(CD-ROM), 39th, 2019

北海道での理想的な血栓回収療法提供体制の確立に向けた取り組み
長内俊也, 東海林菊太郎, 今井哲秋, 寳金清博, 小笠原克彦, 脳血管内治療(Web), 4, Supplement, 2019

北海道の将来における医療資源の適正配置―将来推計人口と推計傷病別患者数によるシミュレーション分析―
谷川琢海, 藤原健祐, 西本尚樹, 大場久照, 小笠原克彦, 医療情報学連合大会プログラム・抄録集, 38th, 438, 22 Nov. 2018
Japanese

道央地域におけるドクターヘリ搬送時間の季節間比較
小林永一, 上村修二, 奈良理, 藤原健祐, 石川智基, 小笠原克彦, 医療情報学連合大会プログラム・抄録集, 38th, 441, 22 Nov. 2018
Japanese

道央地域におけるドクターヘリ搬送時間の季節間比較　　　　　　　　　　　　　　　
小林 永一, 上村 修二, 奈良 理, 藤原 健祐, 石川 智基, 小笠原 克彦, 医療情報学連合大会論文集, 38回, 1106, 1107, Nov. 2018
(一社)日本医療情報学会, Japanese

ISM(Interpretive Structural Modeling)法による遠隔医療普及阻害要因の抽出と普及に向けた対応策について　　　　　　　　　　　　　　　
清水 大暉, 辻 慎太朗, 谷川 琢海, 谷 祐児, 小笠原 克彦, 医療情報学連合大会論文集, 38回, 606, 607, Nov. 2018
(一社)日本医療情報学会, Japanese

北海道の将来における医療資源の適正配置 将来推計人口と推計傷病別患者数のシミュレーション分析　　　　　　　　　　　　　　　
谷川 琢海, 藤原 健祐, 西本 尚樹, 大場 久照, 小笠原 克彦, 医療情報学連合大会論文集, 38回, 1094, 1096, Nov. 2018
(一社)日本医療情報学会, Japanese

北海道における血栓回収療法の現状 Geometric information system(GIS)を用いた検討　　　　　　　　　　　　　　　
長内 俊也, 東海林 菊太郎, 宝金 清博, 藤原 健祐, 小笠原 克彦, 脳血管内治療, 3, Suppl., S224, S224, Nov. 2018
(NPO)日本脳神経血管内治療学会, Japanese

テキストマイニングによる日本放射線技術学会雑誌における研究動向調査　　　　　　　　　　　　　　　
谷川原 綾子, 辻 真太朗, 小笠原 克彦, 日本放射線技術学会雑誌, 74, 9, 978, 978, Sep. 2018
(公社)日本放射線技術学会, Japanese

両親の教育歴と児のSmall for gestational ageとの媒介要因分析 北海道スタディ　　　　　　　　　　　　　　　
田村 菜穂美, 花岡 知之, 伊藤 久美子, 伊藤 佐智子, 宮下 ちひろ, 荒木 敦子, 小笠原 克彦, 岸 玲子, 日本衛生学雑誌, 73, Suppl., S244, S244, Mar. 2018
(一社)日本衛生学会, Japanese

両親の教育歴と児のSmall for gestational ageとの媒介要因分析 北海道スタディ
田村 菜穂美, 花岡 知之, 伊藤 久美子, 伊藤 佐智子, 宮下 ちひろ, 荒木 敦子, 小笠原 克彦, 岸 玲子, 日本衛生学雑誌, 73, Suppl., S244, S244, Mar. 2018
(一社)日本衛生学会, Japanese

教育課程のあり方モデル 4+2年制課程のメリット・デメリット
小笠原克彦, 小笠原克彦, 日本診療放射線技師会誌, 65, 3, 240‐244, 01 Mar. 2018
Japanese

両親の教育歴と児のSmall for gestational ageとの媒介要因分析:北海道スタディ
田村菜穂美, 田村菜穂美, 花岡知之, 伊藤久美子, 伊藤久美子, 伊藤佐智子, 宮下ちひろ, 荒木敦子, 小笠原克彦, 小笠原克彦, 岸玲子, 日本衛生学雑誌(Web), 73, Supplement, S244, Mar. 2018
Japanese

北海道中小規模民間病院における病院情報システム利活用の検討
谷祐児, 藤原健祐, 小笠原克彦, 日本放射線技術学会雑誌, 74, 9, 975‐976(J‐STAGE), 976, 2018
(公社)日本放射線技術学会, Japanese

糖尿病患者の生活習慣改善に影響を与える要因及び地域性の可視化―ベイジアンネットワークを用いたレセプトデータ分析―
鈴木哲平, 田村菜穂美, 榎本尚司, 永井亘, 小笠原克彦, 日本医療情報学会春季学術大会プログラム・抄録集, 22nd, 68‐69, 2018
Japanese

NDBレセプト情報の転帰区分に記載されている死者数の精度
高塚伸太朗, 山口徳蔵, 佐瀬雄治, 小笠原克彦, 辰巳治之, 大西浩文, 日本医療情報学会春季学術大会プログラム・抄録集, 22nd, 150‐151, 2018
Japanese

地理情報システムを利用した北海道における脳卒中センターの適正配置分析
藤原健祐, 長内俊也, 谷川琢海, 小笠原克彦, 日本医療情報学会春季学術大会プログラム・抄録集, 22nd, 156‐157, 2018
Japanese

ベイジアンネットワークを用いた放射線関連Webサイトの閲覧モデルの構築
鈴木隆介, 鈴木哲平, 辻真太朗, 小笠原克彦, 日本医療情報学会春季学術大会プログラム・抄録集, 22nd, 80‐81, 2018
Japanese

将来推計人口メッシュに基づく医療資源の適正配置分析―北海道における患者アクセシビリティの最適化―
谷川琢海, 大場久照, 西本尚樹, 小笠原克彦, 日本医療情報学会春季学術大会プログラム・抄録集, 22nd, 160‐161, 2018
Japanese

北海道の将来における患者受療行動予測分析 未来に向けた医療資源の適正配置に向けて　　　　　　　　　　　　　　　
谷川 琢海, 大場 久照, 西本 尚樹, 小笠原 克彦, 医療情報学連合大会論文集, 37回, 317, 319, Nov. 2017
(一社)日本医療情報学会, Japanese

2型糖尿病患者に対するCGM(Continuous glucose monitoring)システムを用いた血糖値モニタリングアプリケーションの経済評価 マルコフモデルを用いた医療費の推定　　　　　　　　　　　　　　　
辻 真太朗, 鈴木 哲平, 石川 智基, 森井 康博, 谷川 琢海, 小笠原 克彦, 医療情報学連合大会論文集, 37回, 1067, 1068, Nov. 2017
(一社)日本医療情報学会, Japanese

医療機器不具合用語集における定義文記載法の標準化に向けた表記パターン分析　　　　　　　　　　　　　　　
谷川原 綾子, 西本 尚樹, 福田 晋久, 辻 真太郎, 谷川 琢海, 小笠原 克彦, 横井 英人, 医療情報学連合大会論文集, 37回, 1192, 1193, Nov. 2017
(一社)日本医療情報学会, Japanese

北海道の急性期脳梗塞診療に対する地理的アクセシビリティ分析
藤原健祐, 長内俊也, 小林永一, 谷川琢海, 小笠原克彦, 医療情報学連合大会論文集, 37th (CD-ROM), ROMBUNNO.3‐L‐4‐PP12‐1, 1113, 01 Nov. 2017
(一社)日本医療情報学会, Japanese

人口構造の変化を考慮したDemand‐based approachによる医療需給の将来予測―北海道の救急医療を対象として―
石川智基, 藤原健祐, 鈴木哲平, 辻真太朗, 小笠原克彦, 医療情報学連合大会論文集, 37th (CD-ROM), ROMBUNNO.3‐B‐3‐OP21‐3, 738, 01 Nov. 2017
(一社)日本医療情報学会, Japanese

System Dynamicsによる医師数充足と地域偏在の将来予測―北海道の周産期医療を対象として―
石川智基, 藤原健祐, 森井康博, 鈴木哲平, 辻真太朗, 小笠原克彦, 医療情報学連合大会論文集, 37th (CD-ROM), ROMBUNNO.3‐L‐4‐PP12‐2, 1115, 01 Nov. 2017
(一社)日本医療情報学会, Japanese

北海道における救急車の現場到達時間から見た到達圏人口の推計
小林永一, 藤原健祐, 石川智基, 小笠原克彦, 医療情報学連合大会論文集, 37th (CD-ROM), ROMBUNNO.2‐C‐1‐OP2‐1, 316, 01 Nov. 2017
(一社)日本医療情報学会, Japanese

地域偏在度と集中度の分析を併せた北海道における医療従事者の配置検討
森井康博, 藤原健祐, 石川智基, 鈴木哲平, 辻真太朗, 小笠原克彦, 医療情報学連合大会論文集, 37th (CD-ROM), ROMBUNNO.3‐L‐4‐PP12‐3, 1117, 01 Nov. 2017
(一社)日本医療情報学会, Japanese

病院情報システムの中小規模民間病院経営に対する寄与への考察
谷祐児, 藤原健祐, 鈴木哲平, 小笠原克彦, 廣川博之, 医療情報学連合大会論文集, 37th (CD-ROM), ROMBUNNO.3‐B‐3‐OP21‐2, 736, 01 Nov. 2017
(一社)日本医療情報学会, Japanese

脳神経外科領域の医療資源に対する患者アクセス
水口比呂, 小林永一, 藤原健祐, 石川智基, 小笠原克彦, 北海道放射線技術雑誌, 83, 83, 81, 81, 31 Oct. 2017
(公社)日本放射線技術学会-北海道支部, Japanese

ISM(Interpretive Structural Modeling)法による遠隔医療の普及を阻害する要因の構造化　　　　　　　　　　　　　　　
清水 大暉, 谷 祐児, 谷川 琢海, 辻 真太朗, 小笠原 克彦, 北海道放射線技術雑誌, 83, 82, 82, Oct. 2017
(公社)日本放射線技術学会-北海道支部, Japanese

Educational Lecture : Research Ethics In Radiological Technology(8)Revised "Ethical Guidelines for Medical and Health Research Involving Human Subjects"
小笠原 克彦, 日本放射線技術学会雑誌 = Japanese journal of radiological technology, 73, 5, 397, 402, May 2017
日本放射線技術学会, Japanese

Integration of Japanese Medical Device Adverse Event Terminologies.
Ayako Yagahara, Takumi Tanikawa, Katsuhiko Ogasawara, Hideto Yokoi, Studies in health technology and informatics, 245, 1345, 1345, 2017, [International Magazine]
The purpose of this study is to integrate Japanese medical device adverse event terminologies for evaluating terminological consistency. We represented hierarchy and relations among terms using Resource Description Framework (RDF). There were 3521 classes and 14650 properties. As a result of evaluating the consistency of the description in SPARQL, it was evident that the same notations existed within different terminologies (category terms and terms) and some terms had plural definitions., English

Patient accessibility to hospitals in winter road conditions: GIS-based analysis using car navigation probe data
Takumi Tanikawa, Hisateru Ohba, Ayako Yagahara, Katsuhiko Ogasawara, Studies in Health Technology and Informatics, 245, 1383, 2017, [Peer-reviewed]
IOS Press, English

Markov Chain Monte Carlo 法による医療機関Webサイト訪問者の閲覧行動分析　　　　　　　　　　　　　　　
鈴木哲平, 谷祐児, 小笠原克彦, 北海道医学雑誌, 92, 1, 32, 32, 2017
北海道医学会, Japanese

医療情報学における地理情報システム(GIS)の利活用　　　　　　　　　　　　　　　
土井 俊祐, 小笠原 克彦, 矢口 浩平, 谷川 琢海, 中村 敦, 小林 大介, 医療情報学連合大会論文集, 36回, 1, 240, 241, Nov. 2016
(一社)日本医療情報学会, Japanese

コンジョイント分析による診療放射線技術系学生の就労環境の選好に関する調査　　　　　　　　　　　　　　　
藤原 健祐, 谷川原 綾子, 北川 剛, 井上 剛, 小笠原 克彦, 医療情報学連合大会論文集, 36回, 1, 396, 398, Nov. 2016
(一社)日本医療情報学会, Japanese

Convolutional Neural Networkにおけるマンモグラフィ装置品質管理用ファントムを用いた画像認識　　　　　　　　　　　　　　　
福田 晋久, 辻 真太朗, 鈴木 哲平, 谷川原 綾子, 上杉 正人, 小笠原 克彦, 医療情報学連合大会論文集, 36回, 2, 1036, 1037, Nov. 2016
(一社)日本医療情報学会, Japanese

医療機器不具合用語集における同義語抽出に向けた異義語除外法の検討　　　　　　　　　　　　　　　
谷川原 綾子, 西本 尚樹, 辻 真太朗, 福田 晋久, 谷川 琢海, 上杉 正人, 小笠原 克彦, 横井 英人, 医療情報学連合大会論文集, 36回, 2, 1038, 1039, Nov. 2016
(一社)日本医療情報学会, Japanese

Working environment preferences of students majoring in radiological technology: an investigation using conjoint analysis
藤原健祐, 谷川原綾子, 北川剛, 井上剛, 小笠原克彦, 医療情報学, 36, Supplement 1, 396‐398, 01 Nov. 2016
Japanese

χ2値を用いた放射線技術学分野に関する特徴語抽出の試み　　　　　　　　　　　　　　　
福田 晋久, 谷川原 綾子, 辻 真太朗, 西本 尚樹, 谷川 琢海, 小笠原 克彦, 日本放射線技術学会総会学術大会予稿集, 72回, 231, 231, Feb. 2016
(公社)日本放射線技術学会, Japanese

放射線技術学用語集と教科書の索引語の重複調査　　　　　　　　　　　　　　　
辻 真太朗, 福田 晋久, 谷川原 綾子, 川眞田 実, 西本 尚樹, 小笠原 克彦, 日本放射線技術学会総会学術大会予稿集, 72回, 231, 231, Feb. 2016
(公社)日本放射線技術学会, Japanese

放射線技術学用語集構築に向けた領域間の重複語抽出と定義付与について　　　　　　　　　　　　　　　
谷川原 綾子, 辻 真太朗, 福田 晋久, 谷川 琢海, 川眞田 実, 小笠原 克彦, 日本放射線技術学会総会学術大会予稿集, 72回, 231, 232, Feb. 2016
(公社)日本放射線技術学会, Japanese

食物アレルギー情報交換の標準化に向けたコード体系と交換様式の提案　　　　　　　　　　　　　　　
星本 弘之, 小笠原 克彦, 古川 裕之, 池田 和之, 小塚 和人, 近藤 博史, 下堂薗 権洋, 谷川 琢海, 大原 信, 医療情報学連合大会論文集, 35回, 840, 843, Nov. 2015
(一社)日本医療情報学会, Japanese

医療機器不具合用語集の現状調査と問題点抽出　　　　　　　　　　　　　　　
谷川原 綾子, 辻 真太朗, 福田 晋久, 西本 尚樹, 谷川 琢海, 上杉 正人, 小笠原 克彦, 横井 英人, 医療情報学連合大会論文集, 35回, 846, 848, Nov. 2015
(一社)日本医療情報学会, Japanese

N-gramを用いた放射線技術領域へのオントロジー技術利用に関する文献の調査　　　　　　　　　　　　　　　
福田 晋久, 安渡 大輔, 辻 真太朗, 谷川原 綾子, 小笠原 克彦, 医療情報学連合大会論文集, 35回, 916, 917, Nov. 2015
(一社)日本医療情報学会, Japanese

地理情報システムを利用した高性能画像診断装置へのアクセシビリティ分析
藤原健祐, 高橋拓也, 小笠原克彦, 医療情報学連合大会論文集, 35th, 1252‐1253, 1253, 01 Nov. 2015
(一社)日本医療情報学会, Japanese

コンジョイント分析による診療放射線技師を対象とした就労環境の選好に関する調査
藤原健祐, 谷川原綾子, 北川剛, 井上剛, 福田晋久, 西本尚樹, 小笠原克彦, 北海道放射線技術雑誌, 79, 96, 30 Oct. 2015
Japanese

放射線関連Tweetの現状と印象度調査の試み　　　　　　　　　　　　　　　
青木 智大, 谷 祐児, 谷川原 綾子, 西本 尚樹, 小笠原 克彦, 北海道放射線技術雑誌, 79, 96, 96, Oct. 2015
(公社)日本放射線技術学会-北海道支部, Japanese

コンジョイント分析による診療放射線技師を対象とした就労環境の選好に関する調査
北川剛, 井上剛, 藤原健祐, 谷川原綾子, 福田普久, 西本尚樹, 小笠原克彦, 日本放射線技術学会雑誌, 71, 9, 832, 833, 20 Sep. 2015
Japanese

CT・MRI保有施設へのアクセシビリティ分析―北海道における現状と将来予測―
藤原健祐, 藤原健祐, 高橋拓也, 小笠原克彦, 日本放射線技術学会雑誌, 71, 9, 951, 951, 20 Sep. 2015
(公社)日本放射線技術学会, Japanese

児の出生体重と母親の社会経済要因との関連についての疫学研究 北海道スタディ　　　　　　　　　　　　　　　
田村 菜穂美, 伊藤 久美子, 花岡 知之, 喜多 歳子, 西原 進吉, 宮下 ちひろ, 荒木 敦子, 小笠原 克彦, 岸 玲子, 日本衛生学雑誌, 70, Suppl., S190, S190, Mar. 2015
日本衛生学会, Japanese

ベイズ補正標準化死亡比を用いた死亡と医療資源の関連性の分析―北海道を対象として
忠竜宏, 藤原健祐, 小笠原克彦, 医療情報学連合大会論文集, 34th, 580, 581, 06 Nov. 2014
(一社)日本医療情報学会, Japanese

ジニ係数とハーフィンダール‐ハーシュマン指数を援用した高性能画像診断装置の偏在評価
藤原健祐, 忠竜宏, 小笠原克彦, 医療情報学連合大会論文集, 34th, 582, 583, 06 Nov. 2014
(一社)日本医療情報学会, Japanese

画像診断検査による大腸癌肝転移の術前検索における効率の評価　　　　　　　　　　　　　　　
岩田 邦弘, 村上 昇, 鈴木 達也, 森谷 俊春, 谷川 琢海, 小笠原 克彦, 医療情報学連合大会論文集, 34回, 340, 341, Nov. 2014
(一社)日本医療情報学会, Japanese

札幌市における診療科ごとの患者集積分析　　　　　　　　　　　　　　　
高橋 拓也, 谷川 琢海, 小笠原 克彦, 医療情報学連合大会論文集, 34回, 572, 573, Nov. 2014
(一社)日本医療情報学会, Japanese

臨床試験登録データベースを用いた試験件数増加の変化点検出　　　　　　　　　　　　　　　
西本 尚樹, 伊藤 陽一, 谷川原 綾子, 辻 真太朗, 福田 晋久, 上杉 正人, 小笠原 克彦, 医療情報学連合大会論文集, 34回, 306, 307, Nov. 2014
(一社)日本医療情報学会, Japanese

ネットワーク分析による病名とMRI撮影プロトコル間の関係性分析　　　　　　　　　　　　　　　
谷川原 綾子, 辻 真太朗, 潟端 純也, 小笠原 克彦, 仲 知保, 医療情報学連合大会論文集, 34回, 902, 903, Nov. 2014
(一社)日本医療情報学会, Japanese

形容詞を対象とした共起する用語の可視化 放射線治療のリスクと安全に関する文献のテキストマイニング　　　　　　　　　　　　　　　
安渡 大輔, 辻 真太朗, 福田 晋久, 谷川原 綾子, 本間 勝美, 小笠原 克彦, 北海道放射線技術雑誌, 77, 22, 23, Sep. 2014
(公社)日本放射線技術学会-北海道支部, Japanese

放射線治療におけるエラーの分類に対する標準化を目指したオントロジーの適用　　　　　　　　　　　　　　　
辻 真太朗, 福田 晋久, 谷川原 綾子, 西本 尚樹, 本間 勝美, 小笠原 克彦, 日本放射線技術学会総会学術大会予稿集, 70回, 186, 186, Feb. 2014
(公社)日本放射線技術学会, Japanese

ネットワーク分析を用いたMRI申込書記載内容と撮影プロトコルの関係の可視化　　　　　　　　　　　　　　　
谷川原 綾子, 辻 真太朗, 安渡 大輔, 潟端 純也, 濱口 裕行, 小笠原 克彦, 仲 知保, 日本放射線技術学会総会学術大会予稿集, 70回, 186, 186, Feb. 2014
(公社)日本放射線技術学会, Japanese

共起行列を用いた放射線防護に関する文献情報の体系化の試み　　　　　　　　　　　　　　　
福田 晋久, 辻 真太朗, 谷川原 綾子, 西本 尚樹, 本間 勝美, 小笠原 克彦, 日本放射線技術学会総会学術大会予稿集, 70回, 186, 186, Feb. 2014
(公社)日本放射線技術学会, Japanese

Gini IndexとHerfindahl‐Hirschman Indexを併用した放射線診療資源の偏在評価―北海道の経時的変化
藤原健祐, 忠竜宏, 小笠原克彦, 医療情報学連合大会論文集, 33rd, 298, 299, 20 Nov. 2013
(一社)日本医療情報学会, Japanese

インシデントデータに基づいた放射線治療業務のリスクに影響を与える要因分析　　　　　　　　　　　　　　　
佐々木 翔平, 南須原 康行, 遠藤 晃, 佐久嶋 研, 辻 真太朗, 谷川原 綾子, 小笠原 克彦, 医療情報学連合大会論文集, 33回, 478, 479, Nov. 2013
(一社)日本医療情報学会, Japanese

臨床試験登録データベースを用いた試験情報の探索的解析　　　　　　　　　　　　　　　
西本 尚樹, 伊藤 陽一, 谷川原 綾子, 辻 真太朗, 福田 晋久, 小笠原 克彦, 医療情報学連合大会論文集, 33回, 402, 403, Nov. 2013
(一社)日本医療情報学会, Japanese

大学と調剤薬局を結んだ遠隔健康相談 400例の相談内容と今後の展開　　　　　　　　　　　　　　　
小笠原 克彦, 下田 智子, 吉田 祐子, 良村 貞子, 岡崎 光洋, 後藤 輝明, 吉町 昌子, 岩丸 宏明, 田村 信吾, 森山 広行, 黄瀬 信之, 医療情報学連合大会論文集, 33回, 1216, 1217, Nov. 2013
(一社)日本医療情報学会, Japanese

肝細胞特異性MRI造影剤Gd-EOB-DTPA検査の転移性肝腫瘍検出能の評価 システマティックレビューの手法による検討　　　　　　　　　　　　　　　
岩田 邦弘, 村上 昇, 鈴木 達也, 森谷 俊春, 谷川 琢海, 小笠原 克彦, 北海道放射線技術雑誌, 75, 108, 108, Oct. 2013
(公社)日本放射線技術学会-北海道支部, Japanese

テキストマイニングを用いた高度遠隔健康相談内容の探索的検討　　　　　　　　　　　　　　　
下田 智子, 良村 貞子, 岡崎 光洋, 後藤 輝明, 吉町 昌子, 岩丸 宏明, 田村 信吾, 小笠原 克彦, 日本医療情報学会看護学術大会論文集, 14回, 51, 52, Jul. 2013
高速インターネットによる健康相談システムを開発し、遠隔健康相談ができるようになった。この遠隔健康相談記録の内容をテキストマイニング技法により、探索的検討を行った。分析対象期間は2010年3月から2012年6月であった。利用件数は354件(男性122名、女性230名、不明2名)であった。店舗ごとの相談件数は北海道内の4店舗はほぼ同数であり、僻地型、都市近郊型、都市型で差はなかった。利用者の年齢は10から90歳代であり、70歳代が最も多かった。相談内容は、健康相談、育児、排泄、栄養、生活習慣病、運動等であった。全相談のうち16%は、医療機関への受診が必要と判断し、利用者へ受診推奨をした。相談内容を分析すると、名詞では「薬」「受診」「血圧」の出現頻度が高く、形容詞では「高い」「悪い」「痛い」が頻度の上位を占めていた。各言語間の相関関係は明らかにならなかった。「受診」の頻度が高いのは受診すべきか否かを判断して欲しい利用者のニーズの現れであると考えられた。, 日本医療情報学会看護部会, Japanese

地域住民からの健康相談対応に期待される看護師と薬剤師の連携に関する調査研究　　　　　　　　　　　　　　　
平塚 美奈, 岡崎 光洋, 小笠原 克彦, 下田 智子, 良村 貞子, 中安 一幸, 後藤 輝明, 吉町 昌子, 日本薬学会年会要旨集, 133年会, 4, 196, 196, Mar. 2013
(公社)日本薬学会, Japanese

医学・医療分野におけるオントロジーに関する文献の調査　　　　　　　　　　　　　　　
福田 晋久, 辻 真太朗, 谷川原 綾子, 西本 尚樹, 本間 勝美, 上杉 正人, 小笠原 克彦, 日本放射線技術学会総会学術大会予稿集, 69回, 151, 151, Feb. 2013
(公社)日本放射線技術学会, Japanese

放射線技術領域における非劣性検定の症例数設計　　　　　　　　　　　　　　　
西本 尚樹, 伊藤 陽一, 谷川原 綾子, 辻 真太朗, 福田 晋久, 谷川 琢海, 小笠原 克彦, 日本放射線技術学会総会学術大会予稿集, 69回, 156, 156, Feb. 2013
(公社)日本放射線技術学会, Japanese

An ontology design for visualizing implicit knowledge of the radiotherapy risk
Shintaro Tsuji, Akihisa Fukuda, Ayako Yagahara, Katsumi Homma, Naoki Nishimoto, Masahito Uesugi, Katsuhiko Ogasawara, Studies in Health Technology and Informatics, 192, 1-2, 994, 2013, [Peer-reviewed]
English

WTP (Willingness To Pay) for Tele-Health Consultation Service in Hokkaido, Japan
Katsuhiko Ogasawara, Tamotsu Abe, MEDINFO 2013: PROCEEDINGS OF THE 14TH WORLD CONGRESS ON MEDICAL AND HEALTH INFORMATICS, PTS 1 AND 2, 192, 1026, 1026, 2013, [Peer-reviewed]
English

Constructing Mammography Examination Process Ontology Using Affinity Diagram and Hierarchical Task Analysis
Ayako Yagahara, Shintarou Tsuji, Akihisa Fukuda, Yuki Yokooka, Naoki Nishimoto, Kunio Kurowarabi, Katsuhiko Ogasawara, MEDINFO 2013: PROCEEDINGS OF THE 14TH WORLD CONGRESS ON MEDICAL AND HEALTH INFORMATICS, PTS 1 AND 2, 192, 1059, 1059, 2013, [Peer-reviewed]
English

A Pilot Study Measuring Changes in Student Impressions before and after Clinical Training Using a Questionnaire Based on the Semantic Differential Technique
Naomi Tamura, Takayoshi Terashita, Katsuhiko Ogasawara, MEDINFO 2013: PROCEEDINGS OF THE 14TH WORLD CONGRESS ON MEDICAL AND HEALTH INFORMATICS, PTS 1 AND 2, 192, 1038, 1038, 2013, [Peer-reviewed]
English

放射線治療業務を対象としたリスク要因のベイジアンネットワーク分析 放射線治療業務における分析　　　　　　　　　　　　　　　
佐々木 翔平, 谷川原 綾子, 小笠原 克彦, 辻 真太朗, 北海道放射線技術雑誌, 73, 114, 114, Nov. 2012
(公社)日本放射線技術学会-北海道支部, Japanese

生物統計学語彙の構造化を目指した用語収集システムの構築と語彙の階層化　　　　　　　　　　　　　　　
西本 尚樹, 伊藤 陽一, 谷川原 綾子, 横岡 由姫, 辻 真太朗, 福田 晋久, 上杉 正人, 小笠原 克彦, 医療情報学連合大会論文集, 32回, 274, 275, Nov. 2012
(一社)日本医療情報学会, Japanese

ベイジアンネットワークによる放射線治療業務のリスクに影響を与える要因分析　　　　　　　　　　　　　　　
佐々木 翔平, 辻 真太朗, 谷川原 綾子, 小笠原 克彦, 医療情報学連合大会論文集, 32回, 1104, 1105, Nov. 2012
(一社)日本医療情報学会, Japanese

マンモグラフィ内外斜位方向撮影技術に関するオントロジー構築　　　　　　　　　　　　　　　
谷川原 綾子, 横岡 由姫, 辻 真太朗, 福田 晋久, 西本 尚樹, 黒蕨 邦夫, 小笠原 克彦, 医療情報学連合大会論文集, 32回, 1454, 1455, Nov. 2012
(一社)日本医療情報学会, Japanese

オントロジーに関する英文論文抄録を対象とした使用目的の分類　　　　　　　　　　　　　　　
福田 晋久, 辻 真太朗, 谷川原 綾子, 西本 尚樹, 上杉 正人, 小笠原 克彦, 医療情報学連合大会論文集, 32回, 1456, 1457, Nov. 2012
(一社)日本医療情報学会, Japanese

ロジック・ツリーを用いた情報共有のための電子カルテ機能の可視化　　　　　　　　　　　　　　　
横岡 由姫, 谷川原 綾子, 辻 真太朗, 向井 まさみ, 西本 尚樹, 上杉 正人, 奥田 保男, 小笠原 克彦, 医療情報学連合大会論文集, 32回, 1462, 1463, Nov. 2012
(一社)日本医療情報学会, Japanese

Educational Lecture : Statistical Methods for Radiologic Research (3) Descriptive Statistics and Data Visualization
谷川 琢海, 西本 尚樹, 小笠原 克彦, 日本放射線技術学会雑誌, 68, 11, 1546, 1554, Nov. 2012
日本放射線技術学会, Japanese

仮想評価法を利用した地方の自治体病院のための支払意思額
寺下 貴美, 武藤 浩志, 中村 利仁, 小笠原 克彦, 前沢 政次, 北海道醫學雜誌 = Acta medica Hokkaidonensia, 87, 4, Aug. 2012
Japanese

活動基準原価計算(ABC)によるフィルムレス運用時のX線撮影の検査原価
武藤 浩史, 谷 祐児, 鈴木 重政, 横岡 由姫, 阿部 保, 佐瀬 雄治, 寺下 貴美, 小笠原 克彦, 北海道醫學雜誌 = Acta medica Hokkaidonensia, 87, 4, 01 Aug. 2012
Japanese

遠隔健康相談システムを用いた薬局における健康相談の臨床実証報告　　　　　　　　　　　　　　　
岡崎 光洋, 小笠原 克彦, 阿部 保, 下田 智子, 良村 貞子, 中安 一幸, 後藤 輝明, 吉町 昌子, 岩丸 宏明, 田村 信吾, 日本薬学会年会要旨集, 132年会, 4, 189, 189, Mar. 2012
(公社)日本薬学会, Japanese

形態素解析を用いたオントロジーに関する文献の調査　　　　　　　　　　　　　　　
福田 晋久, 辻 真太朗, 横岡 由姫, 谷川原 綾子, 西本 尚樹, 上杉 正人, 小笠原 克彦, 日本放射線技術学会総会学術大会予稿集, 68回, 129, 129, Feb. 2012
(公社)日本放射線技術学会, Japanese

アソシエーション分析を用いた放射線治療計画の確認タスクに対する暗黙的ルールの抽出　　　　　　　　　　　　　　　
辻 真太朗, 福田 晋久, 谷川原 綾子, 西本 尚樹, 上杉 正人, 小笠原 克彦, 日本放射線技術学会総会学術大会予稿集, 68回, 134, 134, Feb. 2012
(公社)日本放射線技術学会, Japanese

放射線技術学研究における統計解析手法の集計と誤用対策の提案　　　　　　　　　　　　　　　
西本 尚樹, 伊藤 陽一, 江口 菜弥帆, 谷川原 綾子, 上杉 正人, 小笠原 克彦, 日本放射線技術学会総会学術大会予稿集, 68回, 279, 279, Feb. 2012
(公社)日本放射線技術学会, Japanese

全国からみた北海道の診療科別医師構成に基づく地域特性の分析　　　　　　　　　　　　　　　
大場 久照, 鳴海 彩香, 谷川 琢海, 石川 智基, 上杉 正人, 小笠原 克彦, 医療情報学連合大会論文集, 31回, 474, 476, Nov. 2011
(一社)日本医療情報学会, Japanese

調剤薬局に設置した遠隔保健相談システム 運用1年6ヵ月間の相談状況分析　　　　　　　　　　　　　　　
小笠原 克彦, 阿部 保, 下田 智子, 良村 貞子, 中安 一幸, 岡崎 光洋, 後藤 輝明, 吉町 昌子, 岩丸 宏明, 田村 信吾, 医療情報学連合大会論文集, 31回, 769, 770, Nov. 2011
(一社)日本医療情報学会, Japanese

遠隔健康相談サービスの支払意志額の推計　　　　　　　　　　　　　　　
阿部 保, 中安 一幸, 良村 貞子, 下田 智子, 岡崎 光洋, 田村 信吾, 岩丸 宏明, 後藤 輝明, 吉町 昌子, 小笠原 克彦, 医療情報学連合大会論文集, 31回, 771, 772, Nov. 2011
(一社)日本医療情報学会, Japanese

高度遠隔健康相談システムを用いた薬局における健康相談の臨床実証実験報告(一般演題(口頭)4,地域・在宅医療(1),Enjoy Pharmacists' Lifestyles)
岡崎 光洋, 吉町 昌子, 後藤 輝明, 田村 信吾, 岩丸 宏明, 下田 智子, 良村 貞子, 小笠原 克彦, 日本医療薬学会年会講演要旨集, 21, 0, 09 Sep. 2011
日本医療薬学会, Japanese

BI-6-2 Tele-health Consultation System Connected Between Drugstore and University
Ogasawara Katsuhiko, Abe Tamotsu, Okazaki Mitsuhiro, Goto Teruaki, Yoshimachi Masako, Iwamaru Hiroaki, Tamura Shingo, Shimoda Tomoko, Yoshimura Sadako, Proceedings of the Society Conference of IEICE, 2011, 1, "SS, 47"-"SS-48", 30 Aug. 2011
The Institute of Electronics, Information and Communication Engineers, Japanese

放射線技術分野における検査オントロジー利用の可能性の検討 文献から調査した応用例　　　　　　　　　　　　　　　
福田 晋久, 辻 真太朗, 横岡 由姫, 谷川原 綾子, 西本 尚樹, 上杉 正人, 小笠原 克彦, 日本放射線技術学会総会学術大会予稿集, 67回, 157, 157, Feb. 2011
(公社)日本放射線技術学会, Japanese

放射線技術分野において検査オントロジーは何に使えるのか? 現場からのニーズの調査　　　　　　　　　　　　　　　
辻 真太朗, 福田 晋久, 横岡 由姫, 谷川原 綾子, 西本 尚樹, 上杉 正人, 小笠原 克彦, 日本放射線技術学会総会学術大会予稿集, 67回, 157, 157, Feb. 2011
(公社)日本放射線技術学会, Japanese

放射線治療計画の確認モデルの構築とルールの定義の試み　　　　　　　　　　　　　　　
辻 真太朗, 福田 晋久, 横岡 由姫, 谷川原 綾子, 西本 尚樹, 上杉 正人, 小笠原 克彦, 日本放射線技術学会総会学術大会予稿集, 67回, 157, 158, Feb. 2011
(公社)日本放射線技術学会, Japanese

放射線医学・技術学用語集の比較 用語の和訳と意味の記述について　　　　　　　　　　　　　　　
谷川原 綾子, 横岡 由姫, 辻 真太朗, 西本 尚樹, 上杉 正人, 小笠原 克彦, 日本放射線技術学会総会学術大会予稿集, 67回, 158, 159, Feb. 2011
(公社)日本放射線技術学会, Japanese

X線撮影検査オントロジーのためのAnalytic Hierarchy Processを用いた診断可否の判断の明示化　　　　　　　　　　　　　　　
横岡 由姫, 谷川原 綾子, 辻 真太朗, 上杉 正人, 西本 尚樹, 小笠原 克彦, 日本放射線技術学会総会学術大会予稿集, 67回, 230, 230, Feb. 2011
(公社)日本放射線技術学会, Japanese

Future Medical Services in Hokkaido – Present distribution of medical services and estimated numbers of future doctors　　　　　　　　　　　　　　　
Proceedings of International symposium on Globalism and Regional Economies; healthcare, 13, 20, 2011

放射線画像診断レポートからの疾患名及びサイズ表現の抽出
西本尚樹, 寺江聡, 谷川原綾子, 横岡由姫, 辻真太朗, 上杉正人, 小笠原克彦, 医療情報学連合大会論文集, 30th, 413-414, 19 Nov. 2010
Japanese

地理情報システムによる千葉県の医療機能に関する経年評価 エントロピーモデルを用いた患者の受療行動の解析　　　　　　　　　　　　　　　
谷川 琢海, 大場 久照, 小笠原 克彦, 安藤 裕, 医療情報学連合大会論文集, 30回, 695, 696, Nov. 2010
(一社)日本医療情報学会, Japanese

マンモグラフィMLO撮影におけるポジショニングのプロセス分析とマンモグラムに与える影響　　　　　　　　　　　　　　　
谷川原 綾子, 横岡 由姫, 辻 真太朗, 西本 尚樹, 上杉 正人, 黒蕨 邦夫, 小笠原 克彦, 医療情報学連合大会論文集, 30回, 1330, 1331, Nov. 2010
(一社)日本医療情報学会, Japanese

調剤薬局に設置した遠隔保健相談システムの開発と実証実験　　　　　　　　　　　　　　　
小笠原 克彦, 佐瀬 雄治, 吉田 祐子, 岡崎 光洋, 後藤 輝明, 吉町 昌子, 岩丸 宏明, 田村 信吾, 下田 智子, 良村 貞子, 医療情報学連合大会論文集, 30回, 1181, 1182, Nov. 2010
(一社)日本医療情報学会, Japanese

北海道東部町村における高度遠隔健康相談システムの開発と現況　　　　　　　　　　　　　　　
吉田 祐子, 良村 貞子, 下田 智子, 岡崎 光洋, 後藤 輝明, 吉町 昌子, 岩丸 宏明, 田村 信吾, 小笠原 克彦, 日本医療情報学会看護学術大会論文集, 11回, 9, 12, Jun. 2010
北海道における医療サービス提供の地域格差を減少させるためのシステムとして高度遠隔健康相談システムを開発し、北海道東部町村で実証実験を行い、その概要を報告した。札幌の大学研究室に設置した相談室と中標津の薬局をシスコシステムズが開発したインターネットによる遠隔TV電話システムにより接続し、薬局で健康相談を希望する利用者が端末ユニットを利用して札幌の相談室の看護師らに相談するシステムである。, 日本医療情報学会看護部会, Japanese

診療放射線技師の意思決定に影響を与える概念の抽出 検査オントロジーによる概念関係の可視化　　　　　　　　　　　　　　　
辻 真太朗, 横岡 由姫, 谷川原 綾子, 上杉 正人, 西本 尚樹, 小笠原 克彦, 日本放射線技術学会総会学術大会予稿集, 66回, 235, 235, Feb. 2010
(公社)日本放射線技術学会, Japanese

整形領域撮影時における再撮影タスク分析とX線検査オントロジーの構築　　　　　　　　　　　　　　　
横岡 由姫, 谷川原 綾子, 辻 真太朗, 西本 尚樹, 上杉 正人, 寺下 貴美, 小笠原 克彦, 日本放射線技術学会総会学術大会予稿集, 66回, 239, 240, Feb. 2010
(公社)日本放射線技術学会, Japanese

CT画像を用いた改良領域拡張法による脳内血腫量半自動計測の試み　　　　　　　　　　　　　　　
信学技報, MI2011-36, 19, 23, 2010

semi-automated Extraction of Brain Hematoma from CT images Using Improved Region-Growing Method　　　　　　　　　　　　　　　
MI2011-36, 19, 23, 2010

Willingness to pay for the use of tele-consultations in pediatric emergency care: a survey on the attitudes of guardians by using a contingent valuation method (CVM)　　　　　　　　　　　　　　　
47, 25, 36, 2010

Improved Dual SnakesによるCT・MRI画像からの側脳室の抽出精度評価
谷川原綾子, 西本尚樹, 上杉正人, 藤原健祐, 北川剛, 井上剛, 寺下貴美, 小笠原克彦, 医療情報学連合大会論文集, 29th, 524, 525, 21 Nov. 2009
Japanese

タスクオントロジーによるX線撮影技術プロセスの可視化の試み トラブルの有無による撮影プロセスの変化分析　　　　　　　　　　　　　　　
横岡 由姫, 谷川原 綾子, 辻 真太朗, 上杉 正人, 西本 尚樹, 寺下 貴美, 小笠原 克彦, 清野 孝, 医療情報学連合大会論文集, 29回, 1042, 1043, Nov. 2009
(一社)日本医療情報学会, Japanese

マンモグラフィ撮影装置を対象とした品質管理オントロジーの構築　　　　　　　　　　　　　　　
谷川原 綾子, 横岡 由姫, 辻 真太朗, 西本 尚樹, 上杉 正人, 黒蕨 邦夫, 寺下 貴美, 小笠原 克彦, 医療情報学連合大会論文集, 29回, 1046, 1047, Nov. 2009
(一社)日本医療情報学会, Japanese

事後確率推定に基づく医学コーパス構築支援
西本尚樹, 寺江聡, 上杉正人, 谷川原綾子, 小笠原克彦, 医療情報学連合大会論文集, 28th, 957-958, 22 Nov. 2008
Japanese

Dual Snakesによるノイズ画像からの輪郭抽出と精度評価　　　　　　　　　　　　　　　
谷川原 綾子, 西本 尚樹, 上杉 正人, 小笠原 克彦, 医療情報学連合大会論文集, 28回, 444, 445, Nov. 2008
(一社)日本医療情報学会, Japanese

Parsing error correction of medical phrases for semantic annotation of clinical radiology reports.
Nishimoto N, Terae S, Uesugi M, Tanikawa T, Endou A, Ogasawara K, Sakurai T, AMIA ... Annual Symposium proceedings / AMIA Symposium. AMIA Symposium, 1070, 1070, Nov. 2008, [Peer-reviewed], [International Magazine]
The purpose of this study is to develop a module for correcting errors in the product of a natural language parser. When tested with 300 CT reports, a total of 604 patterns were generated. The recall and precision was improved to 90.7% and 74.1% after processed by the module from initial 80.5% and 42.8% respectively. This rule-based module will help health care personnel reduce the cost of manual tagging correction for corpus building., English

同一患者の複数施設受診による受療行動パターン抽出の試み : 診療報酬明細書データによるマーケットバスケット分析を用いた受療行動分析
寺下 貴美, 村上 学, 中村 利仁, 川畑 秀伸, 小笠原 克彦, 前沢 政次, 日本医療・病院管理学会誌 = Journal of the Japan Society for Healthcare administration, 45, 135, 135, 01 Oct. 2008
Japanese

ANALYSIS OF THE PATIENT'S BEHAVIOR TO SELECT A HOSPITAL USING GRAVITY MODEL : Five years transition in Hokkaido prefecture, Japan
ISHIZUKA Kazuya, TERASHITA Takayoshi, OHBA Hisateru, TANIKAWA Takumi, OGASAWARA Katsuhiko, Journal of the Japan Society for Healthcare Administration, 45, 4, 289, 298, 01 Oct. 2008
近年，市町村合併や高齢化などにより患者の受療動向も変化している可能性がある。我々はこれまで患者の受療動向を二次医療圏の病院数および二次医療圏間の距離を用いた重力モデルにより説明できることを報告した。今回，北海道の患者受療動向の変化の状況を明らかにするため，平成12年・平成17年の診療分国保患者受療動向調査結果を対象に分析を行った。医療資源の規模・集積によって吸引される影響度を示す規模依存係数β，患者の移動に対する抵抗の大きさを示す距離係数γを入院・外来別に算出し，二次医療圏ごとに散布図として表示した。更に対象期間における係数の変化量と方向をベクトルで表した。散布図より医療資源が不十分であり，移動に負担を感じる二次医療圏は主に道東地域（釧路，根室，十勝，北網，遠紋）であった。ベクトル図より，変化量の顕著な二次医療圏を抽出でき，特に上川北部は入院・外来両方で規模依存係数と距離係数が悪化傾向にあった。The current trend observed in selecting a hospital by prospective patients may have been influenced by factors such as merging of municipalities and increasing number of senior citizens. Past st..., 日本医療・病院管理学会, Japanese

ASSESSING PATIENT MIGRATION BY USING THE MIGRATION PREFERENCE INDEX
OHBA Hisateru, TANIKAWA Takumi, OGASAWARA Katsuhiko, Journal of the Japan Society for Healthcare Administration, 45, 4, 299, 310, 01 Oct. 2008
目的：本研究では，移動選好指数 (MPI) を用いて入院・外来別の受療動向を分析し，特定地域に対する移動選好度を評価することである。方法：対象地域は北海道の二次医療圏（札幌，上川中部，留萌）とした。分析には平成17年5月診療分国保レセプトデータを用いた。MPI値100を基準として特定地域に対する移動選好度の測定と患者移動圏を画定した。また，流出率による測定との比較評価を行った。結果：札幌の流出圏は外来の1圏域であった。一方，流入圏は入院・外来とも広範囲にわたる10以上の圏域で，近隣圏域だけでなく3次医療圏外（宗谷と留萌）のMPIも高かった。上川中部の流出圏は入院・外来とも北空知へのMPIが高かった。流入圏は入院・外来とも3次医療圏の圏域でMPIが顕著に高かった。MPIと流出率との比較では選好度と流出圏が異なる結果となった。結論：MPIによって患者の特定地域への移動選好度や患者移動圏を定量的に評価できた。Purpose: To analyze migration of in- and out-patients by using the migration preference index (MPI) and evaluate the migration preference patterns of specific areas. Method: Secondary medica..., 日本医療・病院管理学会, Japanese

110 胸痛患者における冠動脈CT検査の費用効果分析の試み(医療情報管理 HIS,RISほか,第36回日本放射線技術学会秋季学術大会)
岩田 邦弘, 村上 昇, 小笠原 克彦, 日本放射線技術學會雜誌, 64, 9, 1094, 1094, 20 Sep. 2008
公益社団法人日本放射線技術学会, Japanese

医学用語抽出モジュールの開発—放射線読影レポートを対象として
西本尚樹, 寺江聡, 上杉正人, 寺下貴美, 小笠原克彦, 遠藤晃, 櫻井恒太郎, 医療情報学連合大会論文集, 27th, 376-377, 23 Nov. 2007
Japanese

看護業務タイムスタディにおける業務間遷移確率を用いたシミュレーション　　　　　　　　　　　　　　　
寺下 貴美, 佐藤 ひとみ, 遠藤 晃, 石井 英樹, 西本 尚樹, 上杉 正人, 小笠原 克彦, 櫻井 恒太郎, 前沢 政次, 医療情報学連合大会論文集, 27回, 306, 309, Nov. 2007
(一社)日本医療情報学会, Japanese

公立病院の放射線診療の効率性分析　　　　　　　　　　　　　　　
小笠原 克彦, 谷川 琢海, 大場 久照, 寺下 貴美, 遠藤 晃, 櫻井 恒太郎, 医療情報学連合大会論文集, 27回, 399, 400, Nov. 2007
(一社)日本医療情報学会, Japanese

医療用語抽出のための用語分割点の探索　　　　　　　　　　　　　　　
上杉 正人, 西本 尚樹, 谷川 琢海, 大場 久照, 寺下 貴美, 遠藤 晃, 小笠原 克彦, 櫻井 恒太郎, 医療情報学連合大会論文集, 27回, 692, 693, Nov. 2007
(一社)日本医療情報学会, Japanese

ジニ係数による小児科医師の地域偏在分析　　　　　　　　　　　　　　　
谷川 琢海, 大場 久照, 小笠原 克彦, 櫻井 恒太郎, 医療情報学連合大会論文集, 27回, 1195, 1196, Nov. 2007
(一社)日本医療情報学会, Japanese

259 胸痛患者における薬物負荷造影心筋血流MRI検査の費用効果分析の試み(医療情報管理教育・評価分析・他, 第35回日本放射線技術学会秋季学術大会プログラム)
岩田 邦弘, 窪田 誠, 増田 憲昭, 小笠原 克彦, 日本放射線技術學會雜誌, 63, 9, 1050, 1050, 20 Sep. 2007
公益社団法人日本放射線技術学会, Japanese

青森県における医療サービスのアクセシビリティ評価
大場 久照, 谷川 琢海, 小笠原 克彦, 櫻井 恒太郎, 病院管理, 44, 0, 81, 81, 01 Sep. 2007
Japanese

Selection of Image Transmission System for Visiting Nursing by Analytic Hierarchy Process Model　　　　　　　　　　　　　　　
Proceeding of International Symposium on Humanaized Systems, 173, 176, 2007

画像診断レポートにおける文字間遷移確率の分布
西本尚樹, 上杉正人, 寺江聡, 谷川琢海, 寺下貴美, 遠藤晃, 小笠原克彦, 櫻井恒太郎, 医療情報学連合大会論文集, 26th, 816-817, 817, 30 Oct. 2006
日本語の医学用語の単語間境界判定が困難なことから、判定を容易にするため、文字間の連接確率の算出と単語境界の分布調査を試みた。北海道大学病院における100件のCT読影レポートから形態素解析を行った後、診療放射線技師が単語境界を修正した。修正データより、uni-gram、bi-gram及びtri-gramとして文字間の遷移確率を算出した。その結果、uni-gramでは26036文字より646種の文字種が得られ、文字数と比較して文字種が少なかった。単語をベースにした形態素解析に関しては、解析対象文中において辞書に未登録の単語が発生し、全文解析を行うには辞書の語彙数が無限大となる可能性が示唆された。一方で、文字間の遷移確率を用いることにより辞書の語彙数は有限個に制限することが可能と思われた。, (一社)日本医療情報学会, Japanese

地域医療システム 患者フローと施設配置 北海道における小児救急医療機関の配置分析　　　　　　　　　　　　　　　
谷川 琢海, 大場 久照, 上杉 正人, 寺下 貴美, 西本 尚樹, 小笠原 克彦, 櫻井 恒太郎, 医療情報学連合大会論文集, 26回, 36, 38, Oct. 2006
北海道における小児急病センターの数と配置について検討するため、患者の移動距離に着目したモデルの構築とGIS(地理情報システム)を利用した医療機関の適正配置について分析した。ミニ・サム型施設配置モデルと、ミニ・マックス型施設配置モデルの2つの手法を適用して患者の最大移動距離を最小化するような施設の配置と、各施設が受け持つ圏域を求めた。ミニ・サム型施設配置モデルを適用し、配置する施設の数を増加させると平均移動距離、最大移動距離はともに単調減少した。ミニ・マックス型施設配置モデルを適用し、施設の数を増加させると最大移動距離は連続的に単調減少し、施設の数を6としたときに165km、その後施設の数を増やすと施設の数が18のときに100kmを下回り、施設の数が21のときに91kmとなった。, (一社)日本医療情報学会, Japanese

地域医療システム 患者フローと施設配置 地理情報システム(GIS)を用いた北海道における二次医療圏の圏域分析　　　　　　　　　　　　　　　
大場 久照, 小笠原 克彦, 谷川 琢海, 西本 尚樹, 遠藤 晃, 櫻井 恒太郎, 医療情報学連合大会論文集, 26回, 47, 48, Oct. 2006
地理情報システム(GIS)を用いて受療動向、通勤通学動向、買物動向の分析を行い、北海道における現在の21二次医療圏の圏域を検証し、新たな二次医療圏を提案した。二次医療圏別およびに入院・外来別に算出したPIより、現在の二次医療圏で医療が完結していない市町村の大部分は圏域境界に位置した。7二次医療圏の7町2村で二次医療圏の見直しが必要とされ、新しい二次医療圏を提案した。, (一社)日本医療情報学会, Japanese

小児救急病院を選択するための評価項目の優先度に関する分析 階層分析法を用いた保護者へのアンケート調査　　　　　　　　　　　　　　　
谷川 琢海, 小笠原 克彦, 大場 久照, 上杉 正人, 西本 尚樹, 寺下 貴美, 遠藤 晃, 櫻井 恒太郎, 医療情報学連合大会論文集, 26回, 325, 326, Oct. 2006
地域住民の視点から、小児の救急医療体制において重要となる評価基準を明らかにすることを目的として、階層分析法により分析した。調査は2006年1,2月に、岩見沢市の四つの幼稚園に通う3歳から5歳迄の子供のいる保護者を対象とし、調査票を配布して行った。上位2階層(総合目的と評価基準)に着目して分析を行い、総合目的は「子供が急病の時の医療機関の選択」とした。評価基準は予備調査などから七つを選択した。有効回答数は73であった。各評価基準の重要度を比較したところ、「小児科の医師がいること」が全体の4割を占め、比較的大きかった他の評価基準「病院の評判が良い」「以前に受診したことがある」を4倍以上引き離していた。保護者は小児科専門医の診療を望んでおり、小児科医の存在が保護者の安心につながっていると考えられた。, (一社)日本医療情報学会, Japanese

仮想評価法(CVM)による小児遠隔医療の効果予測 保護者へのアンケート調査による地域比較　　　　　　　　　　　　　　　
小笠原 克彦, 谷川 琢海, 大場 久照, 櫻井 恒太郎, 医療情報学連合大会論文集, 26回, 390, 391, Oct. 2006
小児科医と非小児科医との間で小児遠隔医療システムを導入することの利点について、患者の視点から評価した。この評価のため、岩見沢市又は南富良野町に居住し、2〜5歳の子供を持つ両親に対して、仮想評価法(CVM)を用いたアンケート調査を実施した。更に、ロジットモデルによって以下の項目に対する支払意思額(WTP)を推測した。1)住居地、2)年齢層(30歳代以下、40歳代以上)、3)遠隔地医療の認知度。その結果、岩見沢市と南富良野町のWTPは岩見沢市が南富良野町のそれより高く、30歳代以下と40歳代以上のWTPは40歳代以上が30歳代以下より高かったが、これらの差はいずれも世帯収入との関連性が認められた。一方、遠隔医療の認知度による分類では「知っている」が「知らない」より高かったが、世帯収入との間に関連性は認められなかった。, (一社)日本医療情報学会, Japanese

看護業務タイムスタディのセグメント時系列解析 業務改善の効果の3次元スペクトルアレイによる視覚化
寺下 貴美, 佐藤 ひとみ, 遠藤 晃, 石井 英樹, 高橋 久美子, 孫 芹先, 谷川 琢海, 西本 尚樹, 上杉 正人, 小笠原 克彦, 櫻井 恒太郎, 医療情報学連合大会論文集, 26回, 414, 417, Oct. 2006
タイムスタディで得られたデータを人員と時間毎に配置し、業務グループ毎に色分けして視覚的に分かりやすく表示する業務分布図を開発した。更に、最大エントロピー法を用いた周波数解析を行い、業務に内在する周期的特徴を明らかにしたが、業務の基点を表している位相の情報を抽出できなかった。そこで、位相の情報を明らかにするため、変動する周期的特徴の推移を抽出できるセグメント時系列解析を加えた分析を行い、業務改善の前後の相違を評価できるか検討した。その結果、タイムスタディの時系列解析によって周期的特徴の時間的推移を抽出でき、三次元スペクトルアレイで視覚化することで容易に認識できた。この手法を用いて業務改善の前後で周期的特徴の変化を比較し、新たなタイムスタディの評価が可能と思われた。, (一社)日本医療情報学会, Japanese

Latent Semantic Analysisによる病名の類似度計測循環器病名と消化器病名の分離　　　　　　　　　　　　　　　
上杉 正人, 小笠原 克彦, 西本 尚樹, 谷川 琢海, 寺下 貴美, 櫻井 恒太郎, 医療情報学連合大会論文集, 26回, 542, 543, Oct. 2006
病名を含む医療用語が複合語であることに注目し、潜在的意味解析(latant semantic analysis:LSA)の手法を用いて、病名とその文字の共起性から類似関係を調べ、分離・分類することを試みた。医療用語の意味の近さを定量評価する実験のためには、雑誌「循環器科」の抄録のタイトルから循環器病名の61語を取り出し対象とし、雑誌「日本消化器外科学会雑誌」の抄録のタイトルから消化器病名の82語を取り出し対象とした。そし病名と分解した文字を行と列にして共起性関係を行列にし、LSAを実施して病名群のベクトルから各病名に最も近い意味の病名を計算した。全体で127語(88.8%)がLSAにより正しく消化器病名群と循環器病名群に分離することができた。, (一社)日本医療情報学会, Japanese

医療文書から医療用語の分離抽出 単語長をパラメータとした新聞社説との相互比較　　　　　　　　　　　　　　　
上杉 正人, 小笠原 克彦, 西本 尚樹, 谷川 琢海, 寺下 貴美, 櫻井 恒太郎, 医療情報学連合大会論文集, 26回, 820, 821, Oct. 2006
計算機システムに蓄積された医療データの再利用は医療の質の向上につながると考え、医療用語の分離抽出方法について検討した。1000例の症例報告と3年分及び16年分の新聞社説より2文字以上の漢字及びその前後のカタカナ文字列から成る対象単語群を抽出し、その中から医療用語を抽出した。その結果、症例報告では抽出した医療単語は77.3%で、社説を3年分から16年分に増やしたところ、各々の抽出精度は84.3%及び85.9%と改善が認められた。一方で、再現率は3年分の社説が98.4%、16年分の社説が95.8%と低下が認められた。単語長の長さが増えると共に医療用語の割合が増加したが、16語以上になると、低下する傾向にあった。医療用語中に不必要な漢字の負荷を認めた単語は約2割であった。今後、カタカナのみならず、ひらがなや英文字を含めた抽出を試みる必要がある。, (一社)日本医療情報学会, Japanese

Retrieving Issue of Identifying Semantic Relation between Atomic Medical Terms in Noun-noun Compounds in Reports of Computerized Tomography
NISHIMOTO NAOKI, TERAE SATOSHI, JIANG G, UESUGI MASAHITO, TERASHITA TAKAYOSHI, TANIKAWA TAKUMI, ENDO AKIRA, OGASAWARA KATSUHIKO, SAKURAI TSUNETARO, 医療情報学, 25, 6, 413-420, 420, 20 Jun. 2006
Background: For the automatic retrieval of medical terms from clinical documents, the problems still remain in processing the noun-noun compounds. In addition, the semantic relations extracted from the compounds are useful for building the ontologies in the domain. Purpose: The purpose of the study is to investigate the distribution of the semantic relations between the two atomic medical terms of the noun-noun compounds extracted from the clinical documents. Methods: 100 clinical reports for CT examination generated in July 2005 were collected in a random way at Hokkaido University Hospital. The medical noun-noun compounds were extracted from the reports. We indexed the UMLS semantic type, group for each atomic medical term in the compounds, extracted the UMLS semantic relation according to the index, and analyzed the distribution of the semantic relations. Results: Only 29.9% of the compounds had the UMLS semantic relation defined (mainly including "location_of" and "adjacent_to"), and 70.1% of them undefined. Conclusion: The semantic relations defined in the UMLS are not enough for the noun-noun compounds extracted from the clinical reports, indicating further efforts are needed., Japan Association for Medical Informatics, Japanese

Model analysis for optimal allocation of pediatric emergency center.
Tanikawa T, Ohba H, Terashita T, Uesugi M, Jiang G, Ogasawara K, Sakurai T, AMIA ... Annual Symposium proceedings / AMIA Symposium. AMIA Symposium, 1115, 1115, 2006, [International Magazine]
Optimal allocation of Pediatric Emergency Centers was simulated using both Min-Sum model and Min-Max model, based on the travel distance and child population of Hokkaido prefecture, Japan. Our result should be helpful to select the optimal number and allocation of PECs in the actual scene of decision making, where the financial restriction exists., English

Semantic distribution study of noun*noun compounds in the Japanese CT clinical reports.
Nishimoto N, Satoshi T, Jiang G, Uesugi M, Terashita T, Tanikawa T, Endou A, Ogasawara K, Sakurai T, AMIA ... Annual Symposium proceedings / AMIA Symposium. AMIA Symposium, 1048, 1048, 2006, [International Magazine]
The purpose of this study is to investigate the distribution of the semantic relationships between the two atomic medical terms of the noun-noun compounds extracted from the clinical documents in Japanese. Only 29.9% of the compounds had the UMLS semantic relation defined (mainly including "location_of" and "adjacent_to"). The results indicated that the semantic relations defined in the UMLS semantic network are not enough for describing the noun-noun medical compounds extracted from the Japanese clinical reports., English

冠動脈造影における冠動脈起始の統計学的分類に関する検討　　　　　　　　　　　　　　　
アールティ, 32, 15, 19, 2006

Semantic Distribution Study of Noun-noun Compounds in Japanese Radiological Abstract　　　　　　　　　　　　　　　
Proceedings of First International Conference on Kansei Engineering & Intelligent System, 248, 251, 2006

Measuring Closeness of Meaning among Disease Words with Latent Semantic Analysis　　　　　　　　　　　　　　　
Proceedings of First International Conference on Kanse Engineering & Intelligent System, 252, 256, 2006

看護業務タイムスタディーにおける最大エントロピー法を用いた時系列分析　　　　　　　　　　　　　　　
寺下 貴美, 佐藤 ひとみ, 遠藤 晃, 高橋 久美子, 孫 芹先, 谷川 琢海, 西本 尚樹, 上杉 正人, 小笠原 克彦, 櫻井 恆太郎, 医療情報学連合大会論文集, 25回, 404, 407, Nov. 2005
(一社)日本医療情報学会, Japanese

ミニ・マックス型モデルを用いた救急医療機関の適正配置 北海道の小児急病センターを事例としたモデルの構築と分析　　　　　　　　　　　　　　　
谷川 琢海, 上杉 正人, 小笠原 克彦, 大場 久照, 寺下 貴美, 西本 尚樹, 櫻井 恒太郎, 医療情報学連合大会論文集, 25回, 788, 789, Nov. 2005
(一社)日本医療情報学会, Japanese

画像診断領域の論文抄録に含まれる複合語の意味的分布の調査　　　　　　　　　　　　　　　
西本 尚樹, 蒋 国謙, 寺下 貴美, 上杉 正人, 谷川 琢海, 小笠原 克彦, 櫻井 恒太郎, 医療情報学連合大会論文集, 25回, 970, 971, Nov. 2005
(一社)日本医療情報学会, Japanese

ラフ集合によるインシデントレポートからのインシデント発生要因の分析　　　　　　　　　　　　　　　
小笠原 克彦, 寺下 貴美, 西本 尚樹, 谷川 琢海, 上杉 正人, 大場 久照, 佐藤 ひとみ, 蒋 国謙, 遠藤 晃, 櫻井 恒太郎, 医療情報学連合大会論文集, 25回, 1106, 1107, Nov. 2005
(一社)日本医療情報学会, Japanese

包絡分析法(DEA)による地域医療の効率性の分析 遠隔医療の導入のための北海道道南3次医療圏を事例とした地域評価　　　　　　　　　　　　　　　
谷川 琢海, 大場 久照, 小笠原 克彦, 櫻井 恒太郎, 日本遠隔医療学会雑誌, 1, 1, 124, 125, Oct. 2005
遠隔医療システムの導入が有効な地域を明らかにすることを目的に,経営工学の分野で用いられているDEAを地域医療に適用し分析を行った.医療資源(医療機関数,病床数,医師数)を入力とし,患者数(外来,入院)を出力として地域医療の効率性の評価値を求めた.北海道道南地方の27市町村を事例として分析した結果,7町村に遠隔医療を導入することが,地域医療を支援するために有効であると考えられる.今後は,モデルの妥当性を更に検討し,地域性や時期を考慮した詳細な分析が必要である, (一社)日本遠隔医療学会, Japanese

患者受療動向に関する指標の考案と分析 北海道の二次医療圏を対象として　　　　　　　　　　　　　　　
大場 久照, 小笠原 克彦, 谷川 琢海, 櫻井 恒太郎, 病院管理, 42, Suppl., 167, 167, Aug. 2005
(一社)日本医療・病院管理学会, Japanese

FCA View Tab: A concept-oriented view generation tool for clinical data using formal concept analysis　　　　　　　　　　　　　　　
Proceedings of the 8th International Protege Conference, 91, 93, 2005

テキストマイニングを用いた自由記載入力型看護記録の分析　　　　　　　　　　　　　　　
遠藤 晃, 佐藤 ひとみ, 高橋 久美子, 寺下 貴美, 櫛引 一則, 鈴木 研祠, 小笠原 克彦, 櫻井 恒太郎, 医療情報学連合大会論文集, 24回, 716, 717, Nov. 2004
(一社)日本医療情報学会, Japanese

移動選択指数を用いた患者移動の地域的選択性 北海道を例として　　　　　　　　　　　　　　　
大場 久照, 小笠原 克彦, 谷川 琢海, 西本 尚樹, 蒋 国謙, 遠藤 晃, 櫻井 恒太郎, 医療情報学連合大会論文集, 24回, 494, 495, Nov. 2004
(一社)日本医療情報学会, Japanese

最短路解析モデルを用いた小児急病センターの適正配置 北海道を事例としたモデルの構築と分析　　　　　　　　　　　　　　　
谷川 琢海, 寺下 貴美, 小笠原 克彦, 大場 久照, 西本 尚樹, 櫻井 恒太郎, 医療情報学連合大会論文集, 24回, 500, 501, Nov. 2004
(一社)日本医療情報学会, Japanese

インシデント報告に対するデータマイニングを用いた要因分析の試み　　　　　　　　　　　　　　　
寺下 貴美, 谷川 琢海, 遠藤 晃, 住吉 一宏, 廣田 稔, 小笠原 克彦, 福島 洋子, 河野 龍太郎, 櫻井 恒太郎, 加藤 紘之, 医療情報学連合大会論文集, 24回, 644, 645, Nov. 2004
(一社)日本医療情報学会, Japanese

標準病名辞書による画像診断用語の形態素解析　　　　　　　　　　　　　　　
西本 尚樹, 谷川 琢海, 蒋 国謙, 小笠原 克彦, 櫻井 恒太郎, 医療情報学連合大会論文集, 24回, 812, 813, Nov. 2004
(一社)日本医療情報学会, Japanese

DEA法によるCT・MRIの分布の非効率性に関する検討 2次医療圏を対象として　　　　　　　　　　　　　　　
小笠原 克彦, 大場 久照, 谷川 琢海, 西本 尚樹, 櫻井 恒太郎, 医療情報学連合大会論文集, 24回, 1162, 1163, Nov. 2004
(一社)日本医療情報学会, Japanese

携帯電話・携帯端末による訪問医療支援システムの開発　　　　　　　　　　　　　　　
小笠原 克彦, 堀 享一, 小林 巧, 上田 将之, 奥原 芳子, 安達 妙子, 住吉 一宏, 医科学応用研究財団研究報告, 21, 45, 48, Feb. 2004
携帯電話・携帯端末による訪問医療支援システムの開発の一環として,2種類の動画伝送システムを構築し,基礎評価実験・臨床評価実験を通じて訪問看護・遠隔リハビリテーションへの臨床応用の技術的な可能性を検討した.さらに,実際の訪問看護での臨床評価を行い,携帯電話を遠隔医療に用いる際の技術的な問題点及び携帯電話を用いた遠隔医療を普及させるための社会経済的な問題点を中心に検討した.リアルタイムシステム及びファイル保存システムの両システムにおいて,手ブレや逆光などの撮影条件を考慮すれば実用可能であった.リアルタイムシステムとファイル保存システムの比較では,画質に関してはファイル保存システムが優れていたが,リアルタイムシステムの動画と音声両方がリアルタイムに伝達できるという機能の有用性は極めて大きかった, (公財)鈴木謙三記念医科学応用研究財団, Japanese

A review of health economic assessment for liver transplantation--toward social acceptance of liver transplantation in Japan
Kozo Ishida, Hirohisa Imai, Katsuhiko Ogasawara, Hidehiko Tamashiro, [Nippon kōshū eisei zasshi] Japanese journal of public health, 51, 4, 233, 239, 2004
Japanese, Book review

Movie transmission systems using movie cellular phones　　　　　　　　　　　　　　　
Home Health Care Technology Report, 66, 74, 2004

ISM法によるCRシステム導入要因の構造化分析　　　　　　　　　　　　　　　
小笠原 克彦, 大場 久照, 谷川 琢海, 蒋 国謙, 櫻井 恒太郎, 医療情報学連合大会論文集, 23回, 331, 332, Nov. 2003
(一社)日本医療情報学会, Japanese

特異日における誕生数の経年変化について 病院受診患者を対象とした調査　　　　　　　　　　　　　　　
谷川 琢海, 小笠原 克彦, 大場 久照, 蒋 国謙, 遠藤 晃, 櫻井 恒太郎, 医療情報学連合大会論文集, 23回, 635, 636, Nov. 2003
(一社)日本医療情報学会, Japanese

エントロピーを用いた患者動態の定量的分析 北海道の二次医療圏を事例として　　　　　　　　　　　　　　　
大場 久照, 小笠原 克彦, 谷川 琢海, 蒋 国謙, 遠藤 晃, 櫻井 恒太郎, 医療情報学連合大会論文集, 23回, 867, 868, Nov. 2003
(一社)日本医療情報学会, Japanese

肝臓移植の医療技術評価 患者のQOL測定の試み　　　　　　　　　　　　　　　
小笠原 克彦, 今井 博久, 萩原 邦子, 藤堂 省, 古川 博之, 櫻井 恒太郎, 玉城 英彦, 藤田 博美, 医療情報学連合大会論文集, 22回, 137, 138, Nov. 2002
(一社)日本医療情報学会, Japanese

遠隔医療での携帯電話利用－遠隔リハビリテーション実験から　　　　　　　　　　　　　　　
新医療, 29, 12, 134, 136, 2002

微小球ファントムによるCT3D画像の視覚評価－一対比較法による形状認識評価の試み－　　　　　　　　　　　　　　　
小笠原 一洋, 谷川 琢海, 小笠原 克彦, 小山 美秀, 坂田 元道, 北海道放射線技術学会雑誌, 62, 62, 21, 25, 2002
単一の閾値設定で簡単に画像構成ができるshaded surface display(SSD)法により作成した3D画像を用い,3D画像作成時の閾値が3D画像の形状認識に及ぼす影響を検討するため,一対比較法による3D画像の形状認識の相対的な尺度化を試みた.適合度・一致性・一貫性に関して検討の余地はあるが,一対比較法による3D画像の形状認識の尺度化が可能であった.ファントム球とその周囲の物質のCT値が近い場合,閾値を変化させても形状認識に差が生じなかったが,病変と周囲のCT値が大きい場合,閾値による形状認識に差が生じると考えられた, (公社)日本放射線技術学会-北海道支部, Japanese

医用画像管理とテレラジオロジーの経済性－放射線画像データ量に関する調査研究　　　　　　　　　　　　　　　
Digital Medicine, 3, 2, 55, 57, 2002

Influence of the threshold values of 3D CT images on the shape recognition　　　　　　　　　　　　　　　
Proceeding of the International Symposium- Toward a Development of KANSEI Technology, 149, 152, 2001

Influence of the size of color images taken by digital camera on image reading : ROC curve on red simulative wound
OGASAWARA Katsuhiko, ITO Kuniko, JIANG Guoqian, ENDOH Akira, SAKURAI Tsunetaro, TANI Shigeki, FUKUHARA Yasuyuki, 医療情報学連合大会論文集, 20, 530, 531, 23 Nov. 2000
Japanese

Clinicians' Perceptions and Workflow Analysis Towards the Practice of Evidence Based Medicine (EBM)
JIANG Guoqian, OGASAWARA Katsuhiko, ENDOH Akira, SAKURAI Tsunetaro, 医療情報学連合大会論文集, 20, 0, 390, 391, 23 Nov. 2000
Japanese

Motion Picture Transmission System for Home Visit Rehabilitation by Considering the Operability : A Simple System Using a Cellular Phone
ITO Kuniko, OGASAWARA Katsuhiko, ENDOH Akira, SHYOU Kokuken, SUMIYOSHI Kazuhiro, SATOH Hitomi, OKUHARA Yoshiko, ENDOH Youko, ADACHI Taeko, HORI Junichi, SAKURAI Tunetarou, 医療情報学連合大会論文集, 20, 0, 730, 731, 23 Nov. 2000
Japanese

Evaluation of Image Transmission System for Visiting Nurse using Analytic Hierarchy Process (AHP)
OGASAWARA Katsuhiko, ITO Kuniko, JIANG Guoqian, ENDOH Akira, SATO Hitomi, SAKURAI Tsunetaro, 医療情報学連合大会論文集, 20, 0, 754, 755, 23 Nov. 2000
Japanese

How well do clinicians use computer-based information for clinical practice? Postal survey of clinicians' views in Japan
GQ Jiang, K Ogasawara, A Endoh, T Sakurai, JOURNAL OF THE AMERICAN MEDICAL INFORMATICS ASSOCIATION, 1038, 1038, 2000
English, Summary international conference

マンモグラフィの被曝線量評価と最適撮影条件設定　　　　　　　　　　　　　　　
電子情報通信学会技術研究報告, 100, 287, 37, 42, 2000

デジタルカメラによる色画像の分解能が読影判断に及ぼす影響　　　　　　　　　　　　　　　
INNERVISION, 15, 13, 21, 23, 2000

北海道における放射線診療の地域分布解析
小笠原 克彦, 南部 敏和, 伊達 広行, 遠藤 晃, 櫻井 恒太郎, 宮坂 和男, 放射線医学物理, 60, 0, Apr. 1999
Japanese

Numerical Model of Compressed Breast for the Japanese Women; For the dose simulation of Mammography　　　　　　　　　　　　　　　
Proceeding of the 2nd Japan-Korea Joint Meeting on Medical Physics, 376, 378, 1999

北大病院における遠隔医療と情報ネットワークの試み　　　　　　　　　　　　　　　
北海道医学雑誌, 74, 267, 272, 1999

Attitude Survey of Tele-radiology for Radiographers : Result of a Questionnaire in Hokkaido
小笠原 克彦, 遠藤 晃, 寺江 聡, 桜井 恒太郎, 宮坂 和男, Japanese Journal of Radiological Technology, 54, 9, 1135, 1135, 20 Sep. 1998
Japanese Society of Radiological Technology (JSRT), Japanese

A Numerical Model of a Japanese Women's Compressed Breast for Estimating the Absorbed Dose in Mammography
高橋 秀樹, 小笠原 克彦, 山崎 裕子, 伊達 広行, 下妻 光夫, 森田 穣, Japanese Journal of Radiological Technology, 54, 9, 1147, 1147, 1998
Japanese Society of Radiological Technology, Japanese

Evaluation of the acceptable JPEG-compression ratio of chest X-ray; Using the method of paired comparison
K Ogasawara, Y Ando, M Kitamura, S Terae, T Sakurai, CAR '98 - COMPUTER ASSISTED RADIOLOGY AND SURGERY, 1165, 895, 895, 1998
English

Exploring ways to provide combined medical and long-term care services using big data
Grants-in-Aid for Scientific Research
01 Apr. 2025 - 31 Mar. 2028
古元 重和, 小笠原 克彦, 阿部 計大
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, 25K13360

Development of Large-Scale Receipt Data Analysis Technology to Assess Higher-Order Healthcare Supply and Demand in Support of Patient-sharing Policies
Grants-in-Aid for Scientific Research
01 Apr. 2024 - 31 Mar. 2027
石川 智基, 満武 巨裕, 合田 和生, 小笠原 克彦
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Institute for Health Economics and Policy, Association for Health Economics Rsearch and Social Insurance and Welfare, 24K13383

術中ヒヤリハットを未然に防止する脳神経外科手術支援AI
科学研究費助成事業
Apr. 2024 - Mar. 2027
伊藤 康裕, 杉山 拓, 杉森 博行, 唐 明輝, 伊東 雅基, 小笠原 克彦
日本学術振興会, 基盤研究(C), 北海道大学, 24K15785

Multiple advanced video analysis to elucidate the 'complexity' of microsurgery
Grants-in-Aid for Scientific Research
01 Apr. 2021 - 31 Mar. 2026
杉山 拓, 杉森 博行, 松澤 等, 小笠原 克彦, 藤村 幹, 伊東 雅基
本研究の目的は、外科手術の機能や安全性、術者スキルに関わる重要な要素を探索することであり、この先にアウトカム予測、有害イベント予測、術者スキル評価AIなどを目指すものである。
令和3年度は、頚動脈狭窄症に対する動脈内膜剥離術に焦点を当て、手術映像の解析に着手した。頚動脈を剥離する際の、頚動脈の動き（加速度）に着目し、これを手術映像から測定することで、“組織に対する愛護的な手術操作”の新たな指標と仮定した。１１７例の頚動脈内膜剥離術中映像の網羅的解析により、この新たな指標が、手術スキルおよび手術合併症に相関することが証明された。また、この指標を用いることにより、どの様な手術剥離法が客観的に有用であるか（組織に対して愛護的であるか）を示すことが可能になった。さらには、このような手術パフォーマンスの指標が、従来の研究で多く用いられてきた患者側の指標と同等以上に、治療成績にも相関することが多変量解析の結果からも証明し得た。本研究結果を、現在英語論文として投稿準備中である。
また、微小脳血管吻合のトレーニング映像を用いて、術具の先端を自動追跡する深層学習アルゴリズム、手術操作の対象となる微小血管をセグメンテーションするアルゴリズムの作成を開始し、おおむね精度の高いアルゴリズムが形成されてきている。これらを用いて、術具の軌道分析や、患者組織の変形分析などを行い、術者レベルや血管吻合成否に関与する因子の網羅的探索を継続している。
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, 21K09091

レセプトデータによる医療・介護の経済分析と将来予測：GISによる可視化とAI予測
科学研究費助成事業
01 Apr. 2022 - 31 Mar. 2025
小笠原 克彦
日本学術振興会, 基盤研究(C), 北海道大学, 22K10434

Development of preoperative shared decision making support tools for patients with bladder cancer
Grants-in-Aid for Scientific Research
01 Apr. 2022 - 31 Mar. 2025
丸山 覚, 伊藤 陽一, 大澤 崇宏, 小笠原 克彦
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, 22K09516

Regional Intervention Study on Oral Function Improvement and Nutrition Improvement Program at the Place of Commuting
Grants-in-Aid for Scientific Research
01 Apr. 2020 - 31 Mar. 2025
山崎 裕, 渡邊 裕, 本川 佳子, 玉腰 暁子, 小笠原 克彦
本研究事業の主体となる「げんき発見ドック」において令和4年8、9月および令和5年9月にベースライン調査（参加者合計180名）、令和5年2月および令和6年2月に介入後調査（参加者合計128名）を実施した。データ欠損のあった4名を除いた124名の口腔機能向上・栄養改善プログラムによる改善効果を検討したところ、オーラルフレイルの判定項目の該当数に関して、32名（25.0％）が改善し、67名（52.3％）が維持、29名（22.7％）が悪化した。以上の結果から口腔機能向上・栄養改善プログラムによる改善効果が期待された。
昨年度高齢者の口腔細菌叢において着目した関節リウマチなどとの関連が報告されているPrevotella属とオーラルフレイルの関連については、令和2年げんき発見ドック参加者208名を対象にプレボテラ属の口腔細菌叢に占める割合に関して3群に分類し，オーラルフレイルと各項目との関連を順序ロジスティック回帰分析で検討した．結果3群間とOF の各判定項目では，OF該当項目数(OR:1.48,95%CI:1.14-1.92) ，OF該当者(OR:4.20,95%CI:1.52-11.58)で有意な関連が認められた．本研究結果は，口腔機能低下の検査及び管理が，高齢者の口腔内細菌叢の悪化予防，全身の健康の維持改善に貢献する可能性を示唆した．歯科衛生士、管理栄養士による口腔機能向上・栄養改善プログラムと食事栄養指導については、自宅でのセルフプログラムと郵送によるプログラム実施状況の確認とフィードバックを継続し、令和2年度および令和4年度、令和5年度参加者の介入前後の比較分析を行っている。以上の結果を踏まえ、口腔機能向上・栄養改善プログラム、食事栄養指導のマニュアルの改訂を行った。
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 23K20331

Regional Intervention Study on Oral Function Improvement and Nutrition Improvement Program at the Place of Commuting
Grants-in-Aid for Scientific Research
01 Apr. 2020 - 31 Mar. 2025
山崎 裕, 渡邊 裕, 本川 佳子, 玉腰 暁子, 小笠原 克彦
COVID-19の感染拡大により本研究事業の主体となる北海道岩見沢市の「げんき発見ドック」の開催時期が当初の予定の９月から10月末に延期となったが、感染対策を徹底し高齢者232名の参加を得てベースライン調査を行った。調査内容は感染対策を考慮し、すべて実施することはできなかったが、COVID-19の生活等への影響に関する調査項目を追加し実施した。横断データの分析においては、COVID-19による外出機会の減少はフレイルと関係していること、血中ビタミンD濃度とフレイルが関係していることが明らかになった。また、口腔に関しては、採取した唾液の細菌叢解析を行い、口腔カンジダに関する口腔内細菌叢の悪化とオーラルフレイルとの関連が認められた。また、COVID-19に関連したストレス、運動習慣の状況と包括的口腔関連QOL尺度（GOHAI）との関係を検討した。ロジスティック回帰分析の結果では、他の因子の影響を調整しても、GOHAIとCOVID-19ストレスおよび運動習慣の問題（オッズ4.38）と有意な関連が認められた。結果、COVID-19由来のストレスと運動習慣の欠如が合併することで口腔関連QOLの低下に繋がる可能性が示唆された。
「げんき発見ドック」に参加した232名を対象に、歯科衛生士、管理栄養士による口腔機能向上・栄養改善プログラムと食事栄養指導を6カ月間実施する予定であったが、通いの場がCOVID-19によって自粛となったことから、自宅でのセルフプログラムと郵送によるプログラム実施状況の確認、フィードバックを実施している。3月に実施予定だった事後評価も感染拡大によって中止となり、事後評価は2021年9月に実施予定となった。郵送によるプログラム実施状況の確認とフィードバックをもとにセルフプログラムの等問題点の抽出、改訂を適宜実施している。
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 20H03873

Visualization of Causal Relationships and Simulation of Medical Expensesof Diabetes Lifestyle Improvement Factors from NDB
Grants-in-Aid for Scientific Research
01 Apr. 2018 - 31 Mar. 2022
Ogasawara Katsuhiko
In recent years, national health care costs have been on the rise. In particular, type 2 diabetes, which is closely related to lifestyle-related diseases, is likely to induce complications. Therefore, it is expected that affected patients will experience high medical costs. Therefore, the objectives of this study are 2 points: (1) To provide effective support for lifestyle modification for diabetic patients in the community. (2) To propose an indicator of the effectiveness of such support. Factors influencing the "intention to improve lifestyle" of diabetic patients and characteristics of regional characteristics were visualized by Bayesian network visualization, and the effect of behavioral change expected by lifestyle improvement was examined. Furthermore, we attempted to conduct a cost-effectiveness analysis using a Markov model with blood glucose control self-management remote appropriation in diabetes mellitus.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, 18K09934

Development of the new system to appropriately assess health related quality of life in patients with bladder cancer survivor using patient reported outcome.
Grants-in-Aid for Scientific Research
01 Apr. 2018 - 31 Mar. 2021
Osawa Takahiro
We validated a Japanese version of the bladder cancer index (BCI) as a tool for measuring health-related quality of life (HRQOL) in bladder cancer patients treated with various surgical procedures. In addition, we characterized health related quality of life (HRQOL) in Japanese patients after bladder cancer surgery and to perform cross-cultural comparison between Japanese and American patients.
Although revisions are needed to make it easier for elderly patients to comprehend, we confirmed the reliability and validity of the Japanese BCI. The Japanese BCI could be used for cross-cultural assessments of HRQOL in bladder cancer patients. HRQOL outcomes following treatment of bladder cancer in Japan are comparable to those in the USA, except for sexual functioning and sexual bother. The BCI can be used for cross-cultural assessments of HRQOL in bladder cancer patients.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, 18K09155

Development and evaluation of program to improve nurse's assessment ability cooperating with hospital at home health consultation
Grants-in-Aid for Scientific Research
01 Apr. 2015 - 31 Mar. 2018
Yoshimura Sadako, SUZUKI Teppei, TSUTSUMI Kaori, TAKAHASHI Noriko, SAMUKAWA Mina, TAMURA Naomi, SATOH Hitomi, FUNAKI Noriko, NIIOKA Ikuko
In order to improve the assessment ability of nurses, it is necessary to progress the ability to collect information on health consultation applicants and to improve accurate analytical skills. We developed a data management system that protects personal information. In this study, the data collected were BMI of local residents who need to have remote health consultation, body composition such as muscle mass, self-collected blood data and daily life habits etc. These data were shared by home nurse in charge of consultation and resident through the screen. The simulation training of analysis of each data by home nurse was efficient and effective in interview and inspection by home nurse while sharing data with remote health consultation applicant.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 15H05062

How the radiation health information is spread regionally and temporally?
Grants-in-Aid for Scientific Research
01 Apr. 2014 - 31 Mar. 2016
Ogasawara Katsuhiko
How the radiation health information is spread regionally and temporally?
The purpose of this study is to clarify whether there are any relation between radiation-related articles and recognition that citizen has for radiation. We used newspapers and Twitter data collected during a year from March 2011. We try the Sentiment analysis, regional analysis and Co-occurrence network analysis.
Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Exploratory Research, Hokkaido University, 26670293

Development of remote health consultation in cooperation with non-working nurses in their home
Grants-in-Aid for Scientific Research
01 Apr. 2012 - 31 Mar. 2015
YOSHIMURA Sadako, SHIMODA Tomoko, OGASAWARA Katsuhiko, OKAZAKI Mitsuhiro
Our system consists of remote television and telephone terminals placed in pharmacies in nine municipalities in Japan. The terminals connect to a health consultation room at a University by clinical nurses, public health nurses, or midwifes with >10 years of clinical experience. Using unified communications technology with high-quality images and audio, the telehealth system provides the equivalent of a face-to-face consultation in real time.
The system enables the delivery of advice based on a medical interview, but the auscultation and palpation was impossible for the staff. The findings of our study demonstrate that the telehealth consultation system located at pharmacies, which serve as a center for daily healthcare for most Japanese people, can effectively serve the needs of a diverse population with respect to age and geography.
It was feasible that the non-working nurses in their home collaborate with the telehealth consultation system.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 24390474

自律型健康増進・生活支援のための地域サポート技術の開発検証　　　　　　　　　　　　　　　
戦略的情報通信研究開発推進制度
Apr. 2012 - Mar. 2014
小笠原克彦, 良村貞子, 下田智子, 岡﨑光洋
総務局、北海道総合通信局, 地域ICT振興型研究開発, 北海道大学, 122301001

Visualization and simulation of the healthcare environment by using GIS and system-dynamics
Grants-in-Aid for Scientific Research
2011 - 2013
OGASAWARA Katsuhiko
The purpose of this study was to propose a physician and radiological technologist supply forecasting methodology by applying system dynamics modeling and Gini index to estimate future absolute and relative numbers of medical staffs. We constructed a forecasting model using a system dynamics approach. Furthermore,this study aims to evaluate the medical care provisional system that considers the activity level and other factors of industries within a region. This study calculated the regional activity level that considers the industries in Hokkaido municipalities and the medical care activity level that indicates the adequacy of medical care system. Furthermore, by making each activity level visible on the map, this study also attempted to examine the regionality features.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, 23590579

Application of a geographic information system to the development and evaluation of the regional healthcare planning
Grants-in-Aid for Scientific Research
2009 - 2011
OHBA Hisateru, OGASAWARA Katsuhiko, TANIKAWA Takumi
The purpose of this study was to verify the availability of a geographic information system(GIS) for the development and evaluation of the regional healthcare planning. The following results were obtained :(1) behavior of inpatients in Aomori Prefecture was affected by the regional healthcare policy,(2) widening disparity between hospitals and between areas for the introduction of the national electronic health records system, and maldistribution of region and the research field for the trend of the telemedicine study,(3) the regional maldistribution of doctor about stroke and acute myocardial infarction and care resources in Hokkaido, and problem in the regional cooperation.
Japan Society for the Promotion of Science, Grant-in-Aid for Young Scientists (B), 21790491

Geographical evaluation analysis of a medical resources for radiation therapy
Grants-in-Aid for Scientific Research
2007 - 2009
TANIKAWA Takumi, OHBA Hisateru, OITA Masataka, OGASAWARA Katsuhiko, ANDO Yutaka
"Equalization" of medical care for cancer was one of the aims of the Third-term Ten-year Comprehensive Strategy for Cancer control. The purpose of this study was to appear the regional deviation of medical resources for radiation therapy. We analyzed the distribution of medical resources about radiation therapy using Geographic Information System (GIS) and the magnitude of deviation of radiation therapy medical resources using the Gini coefficient index.
Japan Society for the Promotion of Science, Grant-in-Aid for Young Scientists (B), National Institute of Radiological Sciences, 19790380

遠隔医療の医療技術評価-評価モデルの構築とワークフロー解析
科学研究費助成事業
2003 - 2005
小笠原 克彦
(1)遠隔医療導入のための小児救急医療の現状評価に関する分析
地域住民の視点から小児の救急医療体制において適切な施設の数と規模を明らかにするために、階層分析法(AHP)により地域住民に対する意識を分析した。AHPは3層とし、評価層には「総合病院」「高度の医療設備がある」「待ち時間が短い」など7項目、代替案は医療機関の規模とし「小規模」「中規模」「大規模」の3案とした。調査対象は、北海道岩見沢市および南富良野町の幼稚園・保育園に通園する子供を持つ親、それぞれ100名、50名とした。回答率は50%強であった。岩見沢市の15名の分析結果では、「小児科医のいる施設」の評価値が最も高く0.38、次いで「病院の評判が良い」が0.16であった。
(2)小児救急医療を代替するための遠隔医療システムの経済性に関する分析
地域住民の視点から小児の救急医療体制を代替する遠隔医療システムの経済性を分析するために仮想評価法(CVM)によるWTP(支払意思額)の算出を試みた。本調査では遠隔医療は患者の診察時に医師が遠隔地にいる医師と通信を行うこと(Doctor to Doctor)を想定し、小児の急病患者の受診時に診察を行う医師が小児科または疾患に対応する専門医と動画像等を用いてコミュニケーションが取れるシステムを仮定した。対象は北海道岩見沢市および南富良野町の幼稚園・保育園に通園する子供を持つ親、それぞれ300名、50名とした。回答率は50%強であった。42人のWTPは4,156円であった。この結果は、今後の遠隔医療の普及を計る上で基礎資料になるものと考えられる。
日本学術振興会, 若手研究(B), 北海道大学, 15790263

北海道におけるテレ・ラジオロジーの導入効果に関する研究
科学研究費助成事業
1999 - 1999
小笠原 克彦
日本学術振興会, 特別研究員奨励費, 北海道大学, 99J05641