Researcher Profile and Settings

Affiliation

• Hokkaido University Hospital　Central Clinical Facilities　Radiology

Job Title

• Assistant Professor

J-Global ID

• 201801007657846921

Research Areas

• Life sciences / Radiology

Research Activities

Published Papers

• A Single-Institution Prospective Study To Evaluate the Safety and Efficacy of Real- Time Image-Gated Spot-Scanning Proton Therapy (RGPT) for Prostate Cancer.

  Kentaro Nishioka, Takayuki Hashimoto, Takashi Mori, Yusuke Uchinami, Rumiko Kinoshita, Norio Katoh, Hiroshi Taguchi, Koichi Yasuda, Yoichi M Ito, Seishin Takao, Masaya Tamura, Taeko Matsuura, Shinichi Shimizu, Hiroki Shirato, Hidefumi Aoyama

  Advances in radiation oncology 9 (5) 101464 - 101464 2024/05 

  PURPOSE: In real-time image-gated spot-scanning proton therapy (RGPT), the dose distribution is distorted by gold fiducial markers placed in the prostate. Distortion can be suppressed by using small markers and more than 2 fields, but additional fields may increase the dose to organs at risk. Therefore, we conducted a prospective study to evaluate the safety and short-term clinical outcome of RGPT for prostate cancer. METHODS AND MATERIALS: Based on the previously reported frequency of early adverse events (AE) and the noninferiority margin of 10%, the required number of cases was calculated to be 43 using the one-sample binomial test by the Southwest Oncology Group statistical tools with the one-sided significance level of 2.5% and the power 80%. Patients with localized prostate cancer were enrolled and 3 to 4 pure gold fiducial markers of 1.5-mm diameter were inserted in the prostate. The prescribed dose was 70 Gy(relative biologic effectiveness) in 30 fractions, and treatment was performed with 3 fields from the left, right, and the back, or 4 fields from either side of slightly anterior and posterior oblique fields. The primary endpoint was the frequency of early AE (≥grade 2) and the secondary endpoint was the biochemical relapse-free survival rate and the frequency of late AE. RESULTS: Forty-five cases were enrolled between 2015 and 2017, and all patients completed the treatment protocol. The median follow-up period was 63.0 months. The frequency of early AE (≥grade 2) was observed in 4 cases (8.9%), therefore the noninferiority was verified. The overall 5-year biochemical relapse-free survival rate was 88.9%. As late AE, grade 2 rectal bleeding was observed in 8 cases (17.8%). CONCLUSIONS: The RGPT for prostate cancer with 1.5-mm markers and 3- or 4- fields was as safe as conventional proton therapy in early AE, and its efficacy was comparable with previous studies.
• A new predictive parameter for dose‐volume metrics in intensity‐modulated radiation therapy planning for prostate cancer: Initial phantom study

  Yuki Saito, Ryusuke Suzuki, Naoki Miyamoto, Kenneth Lee Sutherland, Takahiro Kanehira, Masaya Tamura, Takashi Mori, Kentaro Nishioka, Takayuki Hashimoto, Hidefumi Aoyama

  Journal of Applied Clinical Medical Physics 2024/04 [Refereed][Not invited]
  
• Impact of adaptive radiotherapy on survival in locally advanced nasopharyngeal carcinoma treated with concurrent chemoradiotherapy.

  Yusuke Uchinami, Koichi Yasuda, Hideki Minatogawa, Yasuhiro Dekura, Noboru Nishikawa, Rumiko Kinoshita, Kentaro Nishioka, Norio Katoh, Takashi Mori, Manami Otsuka, Naoki Miyamoto, Ryusuke Suzuki, Keiji Kobashi, Yasushi Shimizu, Jun Taguchi, Nayuta Tsushima, Satoshi Kano, Akihiro Homma, Hidefumi Aoyama

  Radiation oncology journal 42 (1) 74 - 82 2024/03 

  PURPOSE: To investigate the clinical significance of adaptive radiotherapy (ART) in locally advanced nasopharyngeal carcinoma treated with intensity-modulated radiotherapy (IMRT). MATERIALS AND METHODS: Eligible patients were treated with concurrent chemoradiotherapy using IMRT. Planning computed tomography in ART was performed during radiotherapy, and replanning was performed. Since ART was started in May 2011 (ART group), patients who were treated without ART up to April 2011 (non-ART group) were used as the historical control. The Kaplan-Meier method was used to calculate overall survival (OS), locoregional recurrence-free survival (LRFS), progression-free survival (PFS), and distant metastasis-free survival (DMFS). LRFS for the primary tumor (LRFS_P) and regional lymph node (LRFS_LN) were also studied for more detailed analysis. Statistical significance was evaluated using the log-rank test for survival. RESULTS: The ART group tended to have higher radiation doses. The median follow-up period was 127 months (range, 10 to 211 months) in the non-ART group and 61.5 months (range, 5 to 129 months) in the ART group. Compared to the non-ART group, the ART group showed significantly higher 5-year PFS (53.8% vs. 81.3%, p = 0.015) and LRFS (61.2% vs. 85.3%, p = 0.024), but not OS (80.7% vs. 80.8%, p = 0.941) and DMFS (84.6% vs. 92.7%, p = 0.255). Five-year LRFS_P was higher in the ART group (61.3% vs. 90.6%, p = 0.005), but LRFS_LN did not show a significant difference (91.9% vs. 96.2%, p = 0.541). CONCLUSION: Although there were differences in the patient backgrounds between the two groups, this study suggests the potential effectiveness of ART in improving locoregional control, especially in the primary tumor.
• Radiotherapy with or without chemotherapy for locally advanced head and neck cancer in elderly patients: analysis of the Head and Neck Cancer Registry of Japan.

  Koichi Yasuda, Yusuke Uchinami, Satoshi Kano, Jun Taguchi, Daisuke Kawakita, Megumi Kitayama, Kentaro Nishioka, Takashi Mori, Fuki Koizumi, Yuri Fujii, Yasushi Shimizu, Keiji Kobashi, Seiichi Yoshimoto, Ken-Ichi Nibu, Akihiro Homma, Hidefumi Aoyama

  International journal of clinical oncology 2023/12/29 

  BACKGROUND: Whether concurrent chemotherapy with radiotherapy (CRT) is effective for elderly patients with head and neck cancer is a controversial topic. This study aimed to analyze the effectiveness of CRT vs. radiation therapy (RT) among elderly patients in Japan. METHODS: Data from the Head and Neck Cancer Registry of Japan were extracted and analyzed. Patients with locally advanced squamous cell carcinoma of the oropharynx, hypopharynx, or larynx who received definitive CRT or RT between 2011 and 2014 were included. RESULTS: CRT was administered to 78% of the 1057 patients aged ≥ 70 years and 67% of the 555 patients aged ≥ 75 years. For the patients aged ≥ 75 years, the overall survival (OS) rate was significantly better in the CRT group than in the RT group (P < 0.05), while the progression-free survival (PFS) rate was not significantly different (P > 0.05). The add-on effect of CRT was significantly poor in elderly patients (P < 0.05), and it was not a significant factor in the multivariate analysis for patients aged ≥ 75 years. After propensity score matching, there were no significant differences in the OS and PFS rates between the patients aged ≥ 70 years and those aged ≥ 75 years (all, P > 0.05). CONCLUSION: Although aggressive CRT is administered to elderly patients in Japan, its effectiveness is uncertain. Further prospective randomized trials are needed to verify whether CRT is superior to RT alone for elderly patients.
• Daily fraction dose-adjusted radiotherapy policy to avoid prolonging the overall treatment time for early glottic squamous cell carcinoma: a single-institutional retrospective study.

  Yasuhiro Dekura, Koichi Yasuda, Hideki Minatogawa, Yusuke Uchinami, Nayuta Tsushima, Takayoshi Suzuki, Satoshi Kano, Takashi Mori, Kentaro Nishioka, Keiji Kobashi, Norio Katoh, Akihiro Homma, Hidefumi Aoyama

  Journal of radiation research 2023/11/10 

  The objective of this study was to determine the outcomes of radical radiotherapy for early glottic squamous cell carcinoma (EGSCC) with the policy of increasing the fraction size during radiotherapy when the overall treatment time (OTT) was expected to be prolonged. Patients diagnosed with clinical T1-2N0M0 EGSCC, who were treated with radical radiotherapy between 2008 and 2019 at Hokkaido University Hospital, were included. Patients received 66 Gy in 33 fractions for T1 disease and 70 Gy in 35 fractions for T2 disease as our standard regimen (usual group [UG]). If the OTT was expected to extend for >1 week, the dose fraction size was increased from 2.0 to 2.5 Gy from the beginning or during radiotherapy (adjusted group [AG]). At this time, we performed a statistical analysis between UG and AG. In total, 116 patients were identified, and the treatment schedules of 29 patients were adjusted. The median follow-up was 60.9 months. In the T1 group, the cumulative 5-year local failure rate was 12.0% in the AG and 15.4% in the UG, and in the T2 group, the rate was 40.7% in the AG and 25.3% in the UG. There were no significant differences between the AG and UG. Similarly, no significant differences were observed for overall survival and progression-free survival rates. Our single-institutional retrospective analysis of EGSCC patients suggested that a method of adjusting the radiotherapy schedule to increase fraction size from the beginning or during the course may be effective in maintaining treatment outcomes.
• The need of radiotherapy optimization for glioblastomas considering immune responses.

  Kentaro Nishioka, Shuhei Takahashi, Takashi Mori, Yusuke Uchinami, Shigeru Yamaguchi, Manabu Kinoshita, Masaaki Yamashina, Hajime Higaki, Katsuya Maebayashi, Hidefumi Aoyama

  Japanese journal of radiology 2023/04/18 [Refereed]
   

  Glioblastoma is the most common of malignant primary brain tumors and one of the tumors with the poorest prognosis for which the overall survival rate has not significantly improved despite recent advances in treatment techniques and therapeutic drugs. Since the emergence of immune checkpoint inhibitors, the immune response to tumors has attracted increasing attention. Treatments affecting the immune system have been attempted for various tumors, including glioblastomas, but little has been shown to be effective. It has been found that the reason for this is that glioblastomas have a high ability to evade attacks from the immune system, and that the lymphocyte depletion associated with treatment can reduce its immune function. Currently, research to elucidate the resistance of glioblastomas to the immune system and development of new immunotherapies are being vigorously carried out. Targeting of radiation therapy for glioblastomas varies among guidelines and clinical trials. Based on early reports, target definitions with wide margins are common, but there are also reports that narrowing the margins does not make a significant difference in treatment outcome. It has also been suggested that a large number of lymphocytes in the blood are irradiated by the irradiation treatment to a wide area in a large number of fractionations, which may reduce the immune function, and the blood is being recognized as an organ at risk. Recently, a randomized phase II trial comparing two types of target definition in radiotherapy for glioblastomas was conducted, and it was reported that the overall survival and progression-free survival were significantly better in a small irradiation field group. We review recent findings on the immune response and the immunotherapy to glioblastomas and the novel role of radiotherapy and propose the need to develop an optimal radiotherapy that takes radiation effects on the immune function into account.
• Proton beam therapy for gliomas: a multicenter prospective registry study from all proton beam facilities in Japan

  Takashi Mori, Masashi Mizumoto, Katsuya Maebayashi, Kentaro Nishioka, Yoshiki Arakawa, Kazuhiko Kurozumi, Koichi Yasuda, Taisuke Sumiya, Hiroyasu Tamamura, Yoshitaka Sato, Takahiro Waki, Masaru Takagi, Yu Takada, Tomoaki Okimoto, Masao Murakami, Yasuhiro Kikuchi, Kazufumi Okada, Yoichi M Ito, Tetsuo Akimoto, Hidefumi Aoyama

  Journal of Radiation Research 0449-3060 2023/04/07 [Refereed]
   

  Abstract We reviewed the outcomes of glioma patients enrolled in a prospective observational registry study of proton beam therapy (PBT) in Japan. The inclusion criteria were glioma patients registered in the Electronic Data Capture system, the Proton-net, between May 2016 and July 2019. Data on patient characteristics, treatments, late adverse events, survival status, recurrence and secondary tumors were extracted and statistically analyzed. The primary endpoint was the overall survival (OS) rate, and the secondary endpoints were the progression-free survival (PFS) rate and cumulative local recurrence rate (cLRR). Of the 65 primary brain tumor patients registered, 29 glioma patients from eight of 19 PBT facilities met the inclusion criteria. There were 19 glioblastoma patients, eight of other malignant gliomas, and two of low-grade gliomas. For glioblastomas, with a median follow-up period of 16 months, the median survival time was 21.2 months and the OS at 1, 2, 3 and 4 years were 77.4%, 44.9%, 23.9% and 23.9%, respectively. The median PFS period was 10.1 months, the 1, 2, 3 and 4-year PFS were 32.4%, 19.4%, 9.7% and 9.7%, respectively. The 1, 2, 3 and 4-year cLRR were 56.1%, 68.8%, 78.4 and 78.4%, respectively. Grade 3 brain necrosis was observed in two patients. No secondary tumor was observed. This is the first report on the current status of PBT for gliomas in Japan. For glioblastomas, the outcomes of PBT are estimated to be equivalent to historical data of photon therapy. The results of a prospective comparative evaluation of PBT and photon therapy are awaited.
• Brain metastases in Japanese NSCLC patients: prognostic assessment and the use of osimertinib and immune checkpoint inhibitors-retrospective study.

  Hajime Higaki, Kentaro Nishioka, Manami Otsuka, Noboru Nishikawa, Motoyasu Shido, Hideki Minatogawa, Yukiko Nishikawa, Rikiya Takashina, Takayuki Hashimoto, Norio Katoh, Hiroshi Taguchi, Rumiko Kinoshita, Koichi Yasuda, Takashi Mori, Yusuke Uchinami, Fuki Koizumi, Yoshihiro Fujita, Shuhei Takahashi, Takahiro Hattori, Noriaki Nishiyama, Hidefumi Aoyama

  Radiation oncology (London, England) 18 (1) 25 - 25 2023/02/07 [Refereed]
   

  BACKGROUND: The Graded Prognostic Assessment for lung cancer using molecular markers (Lung-molGPA) has not been validated for use with Japanese non-small cell lung cancer (NSCLC) patients with brain metastasis (BM) and the factors impacting survival need to be assessed. METHODS: We retrospectively analyzed 294 NSCLC patients who were newly diagnosed with BM between 2013 and 2020 and had received radiotherapy for BM initially at the Hokkaido Cancer Center. We evaluated the effect on the prognosis of Lung-molGPA items, the expression of PD-L1 (classified as high, low, and no expression), and the treatment history. The main outcome was the survival measured from the day of the diagnosis of BM, and log-rank tests were performed to evaluate the results. RESULTS: The median overall survival (OS) times for adenocarcinoma by groups of GPA scores (0‒1.0, 1.5‒2.0, 2.5‒3.0, and 3.5‒4.0) were 5.5, 14.8, 28.3, and 39.0 months (p < 0.0001), respectively. The median survival times for non-adenocarcinoma by groups of GPA scores (0‒1.0, 1.5‒2.0, and 2.5‒3.0) were 3.2, 11.0, and 16.0 months (p = 0.0011), respectively. In adenocarcinoma patients with gene mutations, osimertinib significantly improved the outcome (median OS: 34.2 and 17.6 months with and without osimertinib, respectively (p = 0.0164)). There was no significant difference in the OS between patients who were initially treated with tyrosine-kinase inhibitor for BM and those who initially received radiotherapy (p = 0.5337). In patients tested for PD-L1 expression, the median survival times after the diagnosis of BM were 5.6, 22.5, and 9.3 months for the high-, low- and no-expression groups (p = 0.2198), respectively. Also, in patients with high PD-L1 expressions, those with ICI had survival (median OS, 8.6 months) than those without (median OS, 3.6 months). CONCLUSIONS: We confirmed that Lung-molGPA successfully classified Japanese NSCLC patients with BM by the prognosis. Osimertinib prolonged survival of EGFR-positive NSCLC patients with BM, and ICI was effective in patients with high PD-L1 expressions.
• Distribution of human papilloma virus genotypes and treatment outcomes in definitive radiotherapy for cervical cancer.

  Rumiko Kinoshita, Takashi Mitamura, Fumi Kato, Takahiro Hattori, Hajime Higaki, Shuhei Takahashi, Yoshihiro Fujita, Manami Otsuka, Fuki Koizumi, Yusuke Uchinami, Takashi Mori, Kentaro Nishioka, Takayuki Hashimoto, Yoichi M Ito, Hidemichi Watari, Hidefumi Aoyama

  Journal of radiation research 64 (2) 463 - 470 2023/01/03 [Refereed]
   

  Most oncogenic human papilloma virus (HPV) genotypes stratify into two species, α-7 HPV and α-9 HPV. There are several studies that evaluate the relationship between HPV species and treatment outcomes and reports that HPV species is prognostic. The HPV genotyping was conducted using biopsy specimens which had been stored in these studies. We conducted the study using the HPV test performed by cytology specimens which is less invasive and more useful in clinical settings. This study enrolled 46 patients who received HPV genotyping before the definitive radiotherapy. The results of the HPV genotyping were classified into HPVα-7, HPVα-9 and negatives. Of the 46 patients, 10 were positive for HPVα-7, 21 positive for HPVα-9 and 15 were negative. The median follow-up period was 38 months (range 4-142). The HPVα-7, HPVα-9 and negative groups showed the 3-year overall survival (OS; 59.3%, 80.4% and 72.2% [P = 0.25]); local control (LC; 67.5%, 81% and 80% [P = 0.78]); pelvic control (PC) (50%, 81% and 72.7% [P = 0.032]); pelvic lymph node (PLN) control (78.7%, 95% and 92.3% [P = 0.012]); distant metastasis free (DMF) survival (50%, 75.4% and 42.8% [P = 0.098]); and progression free survival (PFS) rate of patients (30%, 66.7% and 38.9% [P = 0.085]), respectively. Patients with HPVα-7 showed statistically significant poorer PC than the HPVα-9 group, in multivariate analysis. This result is consistent with previous studies for HPV positive patients. The HPV negativity rate was higher in this study than in other studies and further work on this may be needed for clinical use.
• Prostatic urinary tract visualization with super-resolution deep learning models.

  Takaaki Yoshimura, Kentaro Nishioka, Takayuki Hashimoto, Takashi Mori, Shoki Kogame, Kazuya Seki, Hiroyuki Sugimori, Hiroko Yamashina, Yusuke Nomura, Fumi Kato, Kohsuke Kudo, Shinichi Shimizu, Hidefumi Aoyama

  PloS one 18 (1) e0280076  2023 [Refereed]
   

  In urethra-sparing radiation therapy, prostatic urinary tract visualization is important in decreasing the urinary side effect. A methodology has been developed to visualize the prostatic urinary tract using post-urination magnetic resonance imaging (PU-MRI) without a urethral catheter. This study investigated whether the combination of PU-MRI and super-resolution (SR) deep learning models improves the visibility of the prostatic urinary tract. We enrolled 30 patients who had previously undergone real-time-image-gated spot scanning proton therapy by insertion of fiducial markers. PU-MRI was performed using a non-contrast high-resolution two-dimensional T2-weighted turbo spin-echo imaging sequence. Four different SR deep learning models were used: the enhanced deep SR network (EDSR), widely activated SR network (WDSR), SR generative adversarial network (SRGAN), and residual dense network (RDN). The complex wavelet structural similarity index measure (CW-SSIM) was used to quantitatively assess the performance of the proposed SR images compared to PU-MRI. Two radiation oncologists used a 1-to-5 scale to subjectively evaluate the visibility of the prostatic urinary tract. Cohen's weighted kappa (k) was used as a measure of agreement of inter-operator reliability. The mean CW-SSIM in EDSR, WDSR, SRGAN, and RDN was 99.86%, 99.89%, 99.30%, and 99.67%, respectively. The mean prostatic urinary tract visibility scores of the radiation oncologists were 3.70 and 3.53 for PU-MRI (k = 0.93), 3.67 and 2.70 for EDSR (k = 0.89), 3.70 and 2.73 for WDSR (k = 0.88), 3.67 and 2.73 for SRGAN (k = 0.88), and 4.37 and 3.73 for RDN (k = 0.93), respectively. The results suggest that SR images using RDN are similar to the original images, and the SR deep learning models subjectively improve the visibility of the prostatic urinary tract.
• Long-term consequences of residual lesions after chemoradiotherapy in patients with germinoma at onset.

  Shigeru Yamaguchi, Michinari Okamoto, Yukitomo Ishi, Ryosuke Sawaya, Hiroaki Motegi, Minako Sugiyama, Taisuke Harada, Noriyuki Fujima, Takashi Mori, Takayuki Hashimoto, Emi Takakuwa, Atsushi Manabe, Kohsuke Kudo, Hidefumi Aoyama, Miki Fujimura

  Journal of neurosurgery. Pediatrics 1 - 8 2022/09/09 [Refereed]
   

  OBJECTIVE: In patients with intracranial germ cell tumors, residual lesions are sometimes observed after completion of primary chemoradiotherapy. Although salvage resection of these end-of-treatment residual lesions is recommended for patients with nongerminomatous germ cell tumors, the necessity of early salvage resection for those with germinoma is not clear. The aim of this study was to investigate the frequency of residual germinoma lesions after primary chemoradiotherapy, as well as their management, long-term consequences, and prognosis. METHODS: The authors retrospectively reviewed patients who were primarily treated for germinoma between 2002 and 2021. Residual lesions were evaluated with MRI with and without contrast enhancement within 2 weeks after chemoradiotherapy. The decision to perform salvage resection of residual lesions was at the discretion of the treating physicians. The change in appearance of residual lesions was assessed with serial MRI. Overall survival (OS), progression-free survival (PFS), and recurrence pattern were also investigated. RESULTS: Sixty-nine patients were treated with chemoradiotherapy for germinoma, with a mean follow-up period of 108 months. Residual lesions were radiologically observed in 30 patients (43.5%). Among these, 5 patients (3 with pineal lesions and 2 with basal ganglia lesions) underwent salvage resection. Pathological examination revealed teratomatous components in 3 patients, whereas no tumoral components were identified in 2 patients. One patient with a basal ganglia lesion showed worsening of hemiparesis postoperatively. The remaining 25 patients received watchful observation without surgical intervention. Chronological periodic radiological change in residual lesions was evaluated in 21 patients. One year after primary treatment, the size of the residual lesions was stable and had decreased in 10 and 11 patients, respectively. None of the lesions increased in size. The 10-year PFS and OS rates were 96.7% and 97.3% in patients without residual lesions (n = 39), and 87.1% and 100% in patients with residual lesions (n = 30), respectively. Presence of residual lesions had no significant effect on PFS or OS. All recurrences occurred at distant sites or via dissemination without progression of the primary tumor site, regardless of the presence of residual lesion. CONCLUSIONS: End-of-treatment residual lesions are not rare in patients with germinoma, and these residual lesions seldom show progression. Because of the potential risk of surgical complications, the indication for early salvage surgery for residual lesions should be carefully determined. Watchful observation is recommended for the majority of these cases.
• 放射線治療を中心としたがん治療について-最近の変化と将来- 膠芽腫に対する免疫反応を考慮した照射野最適化の必要性

  西岡 健太郎, 高橋 周平, 森 崇, 打浪 雄介, 山口 秀, 木下 学, 山品 将祥, 前林 勝也, 青山 英史

  日本医学放射線学会秋季臨床大会抄録集 (公社)日本医学放射線学会 58回 S345 - S345 0048-0428 2022/08
• 放射線治療を中心としたがん治療について-最近の変化と将来- 膠芽腫に対する免疫反応を考慮した照射野最適化の必要性

  西岡 健太郎, 高橋 周平, 森 崇, 打浪 雄介, 山口 秀, 木下 学, 山品 将祥, 前林 勝也, 青山 英史

  日本医学放射線学会秋季臨床大会抄録集 (公社)日本医学放射線学会 58回 S345 - S345 0048-0428 2022/08
• 【がん免疫療法の展望:免疫チェックポイント阻害薬の併用療法に中心に】免疫チェックポイント阻害薬の併用療法のエビデンス 免疫チェックポイント阻害薬と放射線治療

  安田 耕一, 志藤 元泰, 小泉 富基, 高橋 周平, 藤田 祥博, 大塚 愛美, 宮崎 智彦, 西川 昇, 打浪 雄介, 森 崇, 西岡 健太郎, 木下 留美子, 田口 大志, 加藤 徳雄, 橋本 孝之, 青山 英史

  腫瘍内科 (有)科学評論社 30 (1) 23 - 28 1881-6568 2022/07
• 北海道大学病院放射線治療科関連施設における子宮頸癌に対する根治放射線治療に関するアンケート結果について

  木下 留美子, 打浪 雄介, 高橋 周平, 小泉 富基, 森 崇, 西岡 健太郎, 田口 大志, 橋本 孝之, 高邑 明夫, 西岡 井子, 北原 利博, 土屋 和彦, 井上 哲也, 有本 卓郎, 出倉 康裕, 米坂 祥朗, 鈴木 恵士郎, 川島 和之, 小野寺 俊輔, 喜多村 圭, 長谷川 雅一, 鬼丸 力也, 富田 雅義, 池田 潤, 西山 典明, 青山 英史

  北海道放射線医学雑誌 (NPO)メディカルイメージラボ 2 13 - 18 2022/03 [Refereed]
   

  子宮頸癌に対する根治的放射線治療において子宮内から照射を行う腔内照射は必要不可欠な要素である。腔内照射の設備の維持・更新および子宮頸癌根治照射人数等について北海道大学病院放射線治療科関連病院にアンケートを行った。道内の施設の子宮頸癌根治照射人数は年間10人以下の施設が大半で、腔内照射設備を保有している施設の年間の腔内照射人数は5-9人が4施設、10人以上が2施設であった。腔内照射設備を保有している6施設の内4施設で設備の維持・更新が採算面で難しいという理由で腔内照射の休止を検討している事が明らかとなった。北海道内の子宮頸癌に対する根治照射を継続して行うためには、腔内照射設備を持つ施設への適切な紹介システムの構築と腔内照射が可能な施設の地域性を考慮した適切な集約化が必要と考えられた。(著者抄録)
• HyperArcを用いた多発性脳転移腫瘍に対する脳定位放射線治療中の各標的の位置ずれに関する検討

  山田 亮太, 吉村 高明, 若林 倭, 金平 孝博, 森 崇, 西岡 健太郎, 青山 英史

  日本放射線技術学会総会学術大会予稿集 (公社)日本放射線技術学会 78回 161 - 162 1884-7846 2022/03
• 再照射 小児がんに対する陽子線再照射

  橋本 孝之, 森 崇, 西岡 健太郎, 打浪 雄介, 安田 耕一, 木下 留美子, 田口 大志, 加藤 徳雄, 清水 伸一, 青山 英史

  日本小児血液・がん学会雑誌 (一社)日本小児血液・がん学会 58 (2) 89 - 93 2187-011X 2021/08 

  陽子線治療は通常のX線による放射線治療に比べて線量集中性に優れ,標的への線量を保ったまま周囲の正常組織線量を低減することで,小児がん患者の急性期並びに晩期有害事象の軽減が可能である.2016年4月からは20歳未満の限局性固形悪性腫瘍に対する根治的な陽子線照射が保険適応となり,各施設で小児がんの陽子線治療実施件数が増加傾向にある.局所領域再発に対する再照射は,腫瘍進行抑制・症状緩和と,時に治癒や長期の腫瘍制御による健康状態・QOLの維持をもたらす可能性がある.小児患者に対する再照射における重要臓器・器官の累積耐容線量や安全性は確立していないが,中枢神経腫瘍に対する陽子線再照射により,有害事象の発生を抑えた良好な治療成績が報告されている.今後,小児がん再発の治療選択肢における陽子線再照射の有用性については,前向き臨床試験での評価が必要と考える.(著者抄録)
• Analysis of acute-phase toxicities of intensity-modulated proton therapy using a model-based approach in pharyngeal cancer patients.

  Koichi Yasuda, Hideki Minatogawa, Yasuhiro Dekura, Seishin Takao, Masaya Tamura, Nayuta Tsushima, Takayoshi Suzuki, Satoshi Kano, Takatsugu Mizumachi, Takashi Mori, Kentaro Nishioka, Motoyasu Shido, Norio Katoh, Hiroshi Taguchi, Noriyuki Fujima, Rikiya Onimaru, Isao Yokota, Keiji Kobashi, Shinichi Shimizu, Akihiro Homma, Hiroki Shirato, Hidefumi Aoyama

  Journal of radiation research 62 (2) 329 - 337 2021/03/10 [Refereed]
   

  Pharyngeal cancer patients treated with intensity-modulated proton therapy (IMPT) using a model-based approach were retrospectively reviewed, and acute toxicities were analyzed. From June 2016 to March 2019, 15 pharyngeal (7 naso-, 5 oro- and 3 hypo-pharyngeal) cancer patients received IMPT with robust optimization. Simulation plans for IMPT and intensity-modulated X-ray therapy (IMXT) were generated before treatment. We also reviewed 127 pharyngeal cancer patients with IMXT in the same treatment period. In the simulation planning comparison, all of the normal-tissue complication probability values for dysphagia, dysgeusia, tube-feeding dependence and xerostomia were lower for IMPT than for IMXT in the 15 patients. After completing IMPT, 13 patients completed the evaluation, and 12 of these patients had a complete response. The proportions of patients who experienced grade 2 or worse acute toxicities in the IMPT and IMXT cohorts were 21.4 and 56.5% for dysphagia (P < 0.05), 46.7 and 76.3% for dysgeusia (P < 0.05), 73.3 and 62.8% for xerostomia (P = 0.43), 73.3 and 90.6% for mucositis (P = 0.08) and 66.7 and 76.4% for dermatitis (P = 0.42), respectively. Multivariate analysis revealed that IMPT was independently associated with a lower rate of grade 2 or worse dysphagia and dysgeusia. After propensity score matching, 12 pairs of IMPT and IMXT patients were selected. Dysphagia was also statistically lower in IMPT than in IMXT (P < 0.05). IMPT using a model-based approach may have clinical benefits for acute dysphagia.
• Diagnostic Capability of Cerebrospinal Fluid-Placental Alkaline Phosphatase Value in Intracranial Germ Cell Tumor.

  Michinari Okamoto, Shigeru Yamaguchi, Yukitomo Ishi, Hiroaki Motegi, Takashi Mori, Takayuki Hashimoto, Yukayo Terashita, Shinsuke Hirabayashi, Minako Sugiyama, Akihiro Iguchi, Yuko Cho, Atsushi Manabe, Kiyohiro Houkin

  Oncology 99 (1) 23 - 31 2021 [Refereed]
   

  OBJECTIVE: Most types of intracranial germ cell tumors (IGCTs) are sensitive to chemoradiation. However, biopsy specimens are usually small and thus cannot be used for obtaining an accurate pathological diagnosis. Recently, the cerebrospinal fluid (CSF) placental alkaline phosphatase (PLAP) value has been considered a new biomarker of IGCTs. The present study aimed to evaluate the discriminatory characteristics of the CSF-PLAP value upon diagnosis and at the time of recurrence in patients with IGCTs. METHODS: Between 2015 and 2019, this study included 37 patients with tumors located in the intraventricular and/or periventricular region. The CSF-PLAP level was assessed before the patients received any treatment. The PLAP level was evaluated during and after first-line chemoradiotherapy in 7 patients with IGCTs. The CSF-PLAP values were compared according to histological diagnosis, and the correlation between these values and radiographical features was assessed. The CSF-PLAP values of 6 patients with IGCTs with suspected recurrence were evaluated based on neuroimaging findings. RESULTS: The CSF-PLAP values were significantly higher in patients with IGCTs than in those with other types of brain tumor (n = 19 vs. 18; median: 359.0 vs. <8.0 pg/mL). The specificity and sensitivity were 88 and 95%, respectively, with a cutoff value of 8.0 pg/mL. In patients with IGCT, the CSF-PLAP value was higher in patients with germinoma than in those with nongerminomatous germ cell tumors (n = 12 vs. 7; median: 415.0 vs. 359.0 pg/mL). Regarding the time course, the CSF-PLAP value decreased to below the detection limit after the reception of first-line chemoradiotherapy in all 7 patients. A significant correlation was observed between the initial CSF-PLAP value and the tumor reduction volume after receiving first-line chemoradiotherapy (p < 0.0003, R2 = 0.6165, logY = 1.202logX - 1.727). Among the patients with suspected IGCT recurrence (n = 6), the CSF-PLAP value was high in patients with recurrence (n = 3; median: 259.0 pg/mL), and that in patients (n = 3) without recurrence was below the lower detection limit. CONCLUSIONS: The CSF-PLAP level is a useful biomarker during the initial diagnosis of IGCTs and at the time of recurrence. It may be associated with the volume of germinomatous components of tumors.
• 画像誘導治療の今後について 画像誘導陽子線治療の将来展望

  田口 大志, 橋本 孝之, 加藤 徳雄, 木下 留美子, 安田 耕一, 西岡 健太郎, 森 崇, 打浪 雄介, 宮本 直樹, 高尾 聖心, 清水 伸一, 青山 英史

  日本癌治療学会学術集会抄録集 58回 SY14 - 3 2020/10
• Clinical experience of craniospinal intensity-modulated spot-scanning proton therapy using large fields for central nervous system medulloblastomas and germ cell tumors in children, adolescents, and young adults

  Takayuki Hashimoto, Shinichi Shimizu, Seishin Takao, Shunsuke Terasaka, Akihiro Iguchi, Hiroyuki Kobayashi, Takashi Mori, Takaaki Yoshimura, Yuto Matsuo, Masaya Tamura, Taeko Matsuura, Yoichi M. Ito, Rikiya Onimaru, Hiroki Shirato

  Journal of radiation research 60 (4) 527 - 537 2019/07/01 [Refereed][Not invited]
   

  © The Author(s) 2019. Published by Oxford University Press on behalf of The Japan Radiation Research Society and Japanese Society for Radiation Oncology. The outcomes of intensity-modulated proton craniospinal irradiation (ipCSI) are unclear. We evaluated the clinical benefit of our newly developed ipCSI system that incorporates two gantry-mounted orthogonal online X-ray imagers with a robotic six-degrees-of-freedom patient table. Nine patients (7-19 years old) were treated with ipCSI. The prescribed dose for CSI ranged from 23.4 to 36.0 Gy (relative biological effectiveness) in 13-20 fractions. Four adolescent and young adult (AYA) patients (15 years or older) were treated with vertebral-body-sparing ipCSI (VBSipCSI). Myelosuppression following VBSipCSI was compared with that of eight AYA patients treated with photon CSI at the same institution previously. The mean homogeneity index (HI) in the nine patients was 0.056 (95% confidence interval: 0.044-0.068). The mean time from the start to the end of all beam delivery was 37 min 39 s ± 2 min 24 s (minimum to maximum: 22 min 49 s - 42 min 51 s). The nadir white blood cell, hemoglobin, and platelet levels during the 4 weeks following the end of the CSI were significantly higher in the VBSipCSI group than in the photon CSI group (P = 0.0071, 0.0453, 0.0024, respectively). The levels at 4 weeks after the end of CSI were significantly higher in the VBSipCSI group than in the photon CSI group (P = 0.0023, 0.0414, 0.0061). Image-guided ipCSI was deliverable in a reasonable time with sufficient HI. Using VBSipCSI, AYA patients experienced a lower incidence of serious acute hematological toxicity than AYA patients treated with photon CSI.
• 脳動静脈奇形SRS後に妊娠,分娩に至った1例

  森 崇, 鬼丸 力也, 白土 博樹, 細川 亜美, 森川 守, 水上 尚典, 中山 若樹, 西村 あや子

  Japanese Journal of Radiology (公社)日本医学放射線学会 37 (Suppl.) 14 - 14 1867-1071 2019/02
• Prospective study to evaluate the safety of the world-first spot-scanning dedicated, small 360-degree gantry, synchrotron-based proton beam therapy system.

  Nishioka K, Prayongrat A, Ono K, Onodera S, Hashimoto T, Katoh N, Inoue T, Kinoshita R, Yasuda K, Mori T, Onimaru R, Shirato H, Shimizu S

  Journal of radiation research 59 (suppl_1) i63 - i71 0449-3060 2018/03 [Refereed][Not invited]
   

  This is a report of a single-institution prospective study evaluating the safety of a spot-scanning dedicated, small 360-degree gantry, synchrotron-based proton beam therapy (PBT) system. Data collection was performed for 56 patients with 59 treatment sites who received proton beam therapy at Hokkaido University Hospital between March 2014 and July 2015. Forty-one patients were male and 15 were female. The median age was 66 years. The primary lesion sites were prostate (n = 17), bone/soft tissue (n = 10), liver (n = 7), lung (n = 6), central nervous system (n = 5), colon (n = 2), pancreas (n = 2), kidney (n = 2) and others (n = 5). Chemotherapy was administered in 11 patients. The prescribed total dose was from 20 to 76 GyE (Radiobiological equivalent dose, RBE = 1.1), with the median dose of 65 GyE in 4 to 35 fractions. No PBT-related Common Terminology Criteria for Adverse Events Grade 4 or 5 toxicities were observed; the incidence of early PBT-related Grade 4 adverse events was 0% (95% confidence interval 0 to 6.38%). The most common Grade 3 toxicities were hematologic toxicity (12.5%) unlikely to be related to the PBT. One patient developed a left femoral neck fracture (Grade 3) at 14.5 months after PBT for chondrosarcoma of the left pelvis. The pathological findings showed no other malignancies, suggesting that it was possibly related to the PBT. In conclusion, the spot-scanning dedicated, synchrotron-based PBT system is feasible, but further studies on its long-term safety and efficacy are warranted.
• 【悪性脊椎脊髄腫瘍に対する治療】 原発性悪性脊椎脊髄腫瘍に対する放射線治療

  鬼丸 力也, 森 崇, 加藤 徳雄, 関 俊隆, 白土 博樹

  脊椎脊髄ジャーナル (株)三輪書店 30 (7) 673 - 676 0914-4412 2017/07 [Not refereed][Not invited]
  
• 乳房温存術後接線照射後にFitz-Hugh-Curtis症候群様の肝周囲炎を来した1例

  出倉 康裕, 森 崇, 西川 由記子, 木下 留美子, 橋本 孝之, 白土 博樹, 西岡 健太郎, 清水 伸一, 細田 充主, 山下 啓子

  Japanese Journal of Radiology (公社)日本医学放射線学会 35 (Suppl.) 4 - 4 1867-1071 2017/02
• Olfactory neuroblastoma: the long-term outcome and late toxicity of multimodal therapy including radiotherapy based on treatment planning using computed tomography

  Takashi Mori, Rikiya Onimaru, Shunsuke Onodera, Kazuhiko Tsuchiya, Koichi Yasuda, Hiromitsu Hatakeyama, Hiroyuki Kobayashi, Shunsuke Terasaka, Akihiro Homma, Hiroki Shirato

  RADIATION ONCOLOGY 10 88  1748-717X 2015/04 [Refereed][Not invited]
   

  Background: Olfactory neuroblastoma (ONB) is a rare tumor originating from olfactory epithelium. Here we retrospectively analyzed the long-term treatment outcomes and toxicity of radiotherapy for ONB patients for whom computed tomography (CT) and three-dimensional treatment planning was conducted to reappraise the role of radiotherapy in the light of recent advanced technology and chemotherapy. Methods: Seventeen patients with ONB treated between July 1992 and June 2013 were included. Three patients were Kadish stage B and 14 were stage C. All patients were treated with radiotherapy with or without surgery or chemotherapy. The radiation dose was distributed from 50 Gy to 66 Gy except for one patient who received 40 Gy preoperatively. Results: The median follow-up time was 95 months (range 8-173 months). The 5-year overall survival (OS) and relapse-free survival (RFS) rates were estimated at 88% and 74%, respectively. Five patients with stage C disease had recurrence with the median time to recurrence of 59 months (range 7-115 months). Late adverse events equal to or above Grade 2 in CTCAE v4.03 were observed in three patients. Conclusion: Multimodal therapy including radiotherapy with precise treatment planning based on CT simulation achieved an excellent local control rate with acceptable toxicity and reasonable overall survival for patients with ONB.
• 骨転移をきたした小脳膠芽腫の1例

  湊川 英樹, 森 崇, 鬼丸 力也, 小野寺 俊輔, 白土 博樹, 東海林 菊太郎, 吉田 道春, 小林 浩之, 寳金 清博, 菅野 宏美, 田中 伸哉

  Japanese Journal of Radiology (公社)日本医学放射線学会 33 (Suppl.) 4 - 4 1867-1071 2015/02
• Three-dimensional conformal fractionated radiotherapy for spinal schwannoma with a paravertebral or an intraosseous component

  Onimaru R, Hida K, Takeda N, Onodera S, Nishikawa Y, Mori T, Shirato H

  Jpn J Radiol Springer 33 (12) 757 - 763 1867-1071 2015 [Refereed][Not invited]
   

  Introduction: We retrospectively evaluated the efficacy of three-dimensional conformal radiotherapy (3D-CRT) for spinal schwannoma. Methods: Nine patients with spinal schwannoma were treated with 3D-CRT. All patients had a paravertebral or intraosseous component. Tumor sizes ranged from 0.8 to 8.7 cm, with a median of 3.5 cm. The prescribed dose was 50 Gy in 25 fractions at the isocenter, except for 1 patient who received 66 Gy in 33 fractions for a large sacral tumor. The follow-up period ranged from 20 to 137 months, with a median of 72 months. Results: Tumor shrinkage within 3 mm occurred in 4 patients and tumor expansion within 3 mm occurred in 3. One tumor showed neither expansion nor shrinkage at the last follow-up. One patient experienced transient expansion by 8 mm in diameter at 12 months after the completion of radiotherapy (35-43 mm), and then the tumor size remained unchanged for 7 years. No severe late toxicity a parts per thousand yen grade 3 was observed. Conclusions: Only 1 of 9 tumors showed transit expansion over 3 mm after 3D-CRT, and severe late radiation toxicity was not observed. Use of 3D-CRT should be considered a treatment option for spinal schwannoma.

MISC

• Detailed analysis of failure patterns using deformable image registration in hypopharyngeal cancer patients treated with sequential boost intensity‐modulated radiotherapy

  Manami Otsuka, Koichi Yasuda, Yusuke Uchinami, Nayuta Tsushima, Takayoshi Suzuki, Satoshi Kano, Ryusuke Suzuki, Naoki Miyamoto, Hideki Minatogawa, Yasuhiro Dekura, Takashi Mori, Kentaro Nishioka, Jun Taguchi, Yasushi Shimizu, Norio Katoh, Akihiro Homma, Hidefumi Aoyama  Journal of Medical Imaging and Radiation Oncology  67-  (1)  98  -110  2022/11/14  

  INTRODUCTION: Sequential boost intensity-modulated radiotherapy (SQB-IMRT) uses two different planning CTs (pCTs) and treatment plans. SQB-IMRT is a form of adaptive radiotherapy that allows for responses to changes in the shape of the tumour and organs at risk (OAR). On the other hand, dose accumulation with the two plans can be difficult to evaluate. The purpose of this study was to analyse patterns of loco-regional failure using deformable image registration (DIR) in hypopharyngeal cancer patients treated with SQB-IMRT. METHODS: Between 2013 and 2019, 102 patients with hypopharyngeal cancer were treated with definitive SQB-IMRT at our institution. Dose accumulation with the 1st and 2nd plans was performed, and the dose to the loco-regional recurrent tumour volume was calculated using the DIR workflow. Failure was classified as follows: (i) in-field (≥95% of the recurrent tumour volume received 95% of the prescribed dose); (ii) marginal (20-95%); or (iii) out-of-field (<20%). RESULTS: After a median follow-up period of 25 months, loco-regional failure occurred in 34 patients. Dose-volume histogram analysis showed that all loco-regional failures occurred in the field within 95% of the prescribed dose, with no marginal or out-of-field recurrences observed. CONCLUSION: The dosimetric analysis using DIR showed that all loco-regional failures were within the high-dose region. More aggressive treatment may be required for gross tumours.
• 免疫チェックポイント阻害薬と放射線治療—Clinical evidences for the combination of immune checkpoint inhibitor and radiation therapy—特集 がん免疫療法の展望 : 免疫チェックポイント阻害薬の併用療法に中心に ; 免疫チェックポイント阻害薬の併用療法のエビデンス

  安田 耕一, 志藤 元泰, 小泉 富基, 高橋 周平, 藤田 祥博, 大塚 愛美, 宮﨑 智彦, 西川 昇, 打浪 雄介, 森 崇, 西岡 健太郎, 木下 留美子, 田口 大志, 加藤 徳雄, 橋本 孝之, 青山 英史  腫瘍内科 = Clinical oncology / 腫瘍内科編集委員会 編  30-  (1)  23  -28  2022/07
• HyperArcを用いた多発性脳転移腫瘍に対する脳定位放射線治療中の各標的の位置ずれに関する検討

  山田亮太, 吉村高明, 吉村高明, 若林倭, 金平孝博, 森崇, 西岡健太郎, 青山英史  日本放射線技術学会総会学術大会予稿集  78th-  2022
• Proton beam therapy for reirradiation in pediatric cancer

  橋本孝之, 森崇, 西岡健太郎, 打浪雄介, 安田耕一, 木下留美子, 田口大志, 加藤徳雄, 清水伸一, 青山英史  日本小児血液・がん学会雑誌(Web)  58-  (2)  2021
• 肝細胞癌陽子線治療前MRIにおけるばらつきの小さいADC値指標の検討:治療効果予測に向けた前段階の研究

  藤田祥博, 加藤徳雄, 田口大志, 打浪雄介, 西岡健太郎, 森崇, 湊川英樹, 安田耕一, 清水伸一, 青山英史  日本放射線腫瘍学会高精度放射線外部照射部会学術大会プログラム・抄録集  34th-  2021
• Automatic Bladder Delineation on MR Images Using a Convolution Neural Network for Online Image-Guided Radiotherapy

  K. Nishioka, Y. Nomura, T. Hashimoto, R. Kinoshita, N. Katoh, H. Taguchi, K. Yasuda, T. Mori, Y. Uchinami, M. Otsuka, T. Matsuura, S. Takao, R. Suzuki, S. Tanaka, T. Yoshimura, H. Aoyama, S. Shimizu  International Journal of Radiation Oncology*Biology*Physics  108-  (3)  e288  -e289  2020/11  [Refereed]
  
• 画像誘導陽子線治療の将来展望

  田口大志, 橋本孝之, 橋本孝之, 加藤徳雄, 木下留美子, 安田耕一, 西岡健太郎, 西岡健太郎, 森崇, 打浪雄介, 宮本直樹, 高尾聖心, 清水伸一, 清水伸一, 青山英史  日本癌治療学会学術集会(Web)  58th-  2020
• 全脳全脊髄強度変調陽子線照射(IMPT)が骨髄抑制軽減に有用であったAYA世代胚細胞腫瘍の2例

  橋本 孝之, 寺坂 俊介, 井口 晶裕, 山口 秀, 小林 浩之, 杉山 未奈子, 長 祐子, 森 崇, 高尾 聖心, 松浦 妙子, 鬼丸 力也, 清水 伸一, 白土 博樹  日本小児血液・がん学会雑誌  55-  (1)  76  -76  2018/06  [Not refereed][Not invited]
  
• 聴神経鞘腫に対する定位放射線治療後に腫瘍内出血を来した2例

  打浪雄介, 鬼丸力也, 白土博樹, 森崇, 山口秀, 寺坂俊介, 小林浩之, 藤原圭志, 本間明宏  Japanese Journal of Radiology  36-  (Supplement)  8  -8  2018/02/25  [Not refereed][Not invited]
  
• Benefits of Craniospinal Intensity-modulated Proton Beam Therapy in Reducing the Myelosuppression for Adolescent Germ Cell Tumors: Two Case Reports

  Takayuki Hashimoto, Syunsuke Terasaka, Akihiro Iguchi, Shigeru Yamaguchi, Hiroyuki Kobayashi, Minako Sugiyama, Yuko Cho, Takashi Mori, Seishin Takao, Taeko Matsuura, Rikiya Onimaru, Shinichi Shimizu, Hiroki Shirato  PEDIATRIC BLOOD & CANCER  64-  S87  -S88  2017/11  [Not refereed][Not invited]
  
• Kasabach-Merritt症候群を合併した血管腫に対する陽子線治療の有用性について

  渡邊 敏史, 井口 晶裕, 長 祐子, 杉山 未奈子, 廣瀬 文, 森 崇, 高尾 聖心, 橋本 孝之, 鬼丸 力也, 清水 伸一, 白土 博樹  日本小児血液・がん学会雑誌  54-  (4)  347  -347  2017/10  [Not refereed][Not invited]
  
• 甲状腺癌分化癌の骨転移に対するIMRTを含めた外照射の治療成績

  安田耕一, 加藤徳雄, 岡本祥三, 木下留美子, 志賀哲, 水町貴諭, 畠山博充, 本間明宏, 田口純, 清水康, 森崇, 土屋和彦, 白土博樹  頭けい部癌  43-  (2)  221  -221  2017/05/10  [Not refereed][Not invited]
  
• Tufted angiomaに対し放射線治療を行った1例

  長江伸樹, 森崇, 木下留美子, 鬼丸力也, 白土博樹, 西村真智子, 畑中佳奈子, 木村鉄宣  Japanese Journal of Radiology  35-  (Supplement)  4  2017/02/25  [Not refereed][Not invited]
  
• 頭蓋底腫瘍術後に強度変調放射線治療を行った2例

  森崇, 宮本直樹, 鈴木隆介, 鬼丸力也, 白土博樹  Japanese Journal of Radiology  35-  (Supplement)  4  2017/02/25  [Not refereed][Not invited]
  
• 分子イメージングを用いた放射線治療

  安田耕一, 安田耕一, 岡本祥三, 西川由記子, 伊藤陽一, 志賀哲, 井上哲也, 森崇, 豊永拓哉, 鬼丸力也, 渡邊史郎, 土屋和彦, 竹内渉, 加藤徳雄, 加藤徳雄, 久下裕司, 玉木長良, 白土博樹, 白土博樹  JSMI Report  9-  (2)  83  -83  2016/04/25  [Not refereed][Not invited]
  
• 椎体IMRTとその精度に関する研究

  安田耕一, 清水伸一, 橋本孝之, SUTHERLAND Ken, 白土博樹, 土屋和彦, 加藤徳雄, 鬼丸力也, 木下留美子, 井上哲也, 西岡健太郎, 西川由記子, 森崇, 原田慶一, 原田八重, 鈴木隆介, 寅松千枝, 松浦妙子, 高尾聖心, 宮本直樹, 伊藤陽一  Japanese Journal of Radiology  34-  (Supplement)  5  -5  2016/02/25  [Not refereed][Not invited]
  
• The Voxel-based Analysis of FMISO-PET Image in Patients With Local Recurrence of Nasopharyngeal Carcinoma

  Y. Nishikawa, K. Yasuda, S. Okamoto, Y. M. Ito, T. Mori, R. Onimaru, T. Shiga, K. Tsuchiya, S. Watanabe, W. Takeuchi, N. Katoh, Y. Kuge, N. Tamaki, H. Shirato  INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS  93-  (3)  E337  -E337  2015/11  [Not refereed][Not invited]
  
• 当科における嗅神経芽細胞腫に対する放射線治療成績の検討

  森崇, 土屋和彦, 西川昇, 鬼丸力也, 小野寺俊輔, 安田耕一, 白土博樹  Jpn J Radiol  33-  (Supplement)  4  -4  2015/02/25  [Not refereed][Not invited]
  

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