Faculty Profiles - OITA Masataka

MISC - OITA Masataka

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IMRTとIGRT:Inverse Planningの理論と装置に求められる性能

石川正純, 鈴木恵士朗, 木下留美子, 藤田勝久, 山崎理衣, 笈田将皇, 白土博樹

頭けい部癌 33 ( 2 ) 64 2007.5

I‐125永久挿入治療の物理Q&Aガイドラインの作成

高橋豊, 山下孝, 隅田伊織, 佐藤智春, 笈田将皇, 橋本光康, 中村譲, 土器屋卓志

日本医学放射線学会学術集会抄録集 66th S253 - S253 2007.2

プラスチックシンチレーションファイバー検出器の応答特性に関する基礎的検討

笈田将皇, 石川正純, 藤野賢治, 加藤徳雄, 田口大志, 白土博樹, 渡辺良晴

日本放射線腫よう学会誌 18 ( Supplement 1 ) 199 2006.10

極微小プラスチックシンチレータを用いた水吸収線量測定法の開発

石川正純, 笈田将皇, 加藤徳雄, 藤野賢治, 大坂康博, 白土博樹

日本放射線腫よう学会誌 18 ( Supplement 1 ) 199 2006.10

肺がん定位照射における計算アルゴリズムの違いによるリスク臓器の線量変化

鄭歩宏, 劉暁濱, 笈田将皇, 石川正純, 藤野賢治, 鬼丸力也, 白土博樹

日本放射線腫よう学会誌 18 ( Supplement 1 ) 201 2006.10

放射線治療への臨床応用を目的としたモンテカルロシミュレーションによるSOF検出器の応答特性

笈田将皇, 石川正純, 藤田勝久, 渡辺良晴

日本放射線技術学会雑誌 62 ( 9 ) 1237 - 1237 2006.9

195 CTとリニアックの同室設置における諸問題について(放射線治療呼吸同期・定位照射,一般研究発表,日本放射線技術学会第34回秋季学術大会)

西島昭彦, 青山裕一, 佐野尚樹, 笈田将皇, 山下幹子

日本放射線技術學會雜誌 62 ( 9 ) 1239 - 1239 2006.9

Retrospective analysis of prostate cancer patients with fiducial gold markers using a real-time tumor tracking system

M. Oita, Y. Osaka, R. Onimaru, S. Onodera, K. Fujita, E. Saito, H. Shirato

MEDICAL PHYSICS 33 ( 6 ) 2048 - 2048 2006.6

Report on the 2005 Scientific Assembly and Annual Meeting Participating in the 8th Biennial ESTRO Meeting on Physics and Radiation Technology for Clinical Radiotherapy

OITA Masataka

Japanese journal of radiological technology 62 ( 5 ) 711 - 713 2006.5

Uncertainty in treatment of head-and-neck tumors by use of intraoral mouthpiece and embedded fiducials International journal

M Oita, K Ohmori, K Obinata, R Kinoshita, R Onimaru, K Tsuchiya, K Suzuki, T Nishioka, H Ohsaka, K Fujita, T Shimamura, H Shirato, K Miyasaka

INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS 64 ( 5 ) 1581 - 1588 2006.4

Language：English Publisher：ELSEVIER SCIENCE INC

Purpose: To reduce setup error and intrafractional movement in head-and-neck treatment, a real-time tumor tracking radiotherapy (RTRT) system was used with the aid of gold markers implanted in a mouthpiece.
Methods and Materials: Three 2-mm gold markers were implanted into a mouthpiece that had been custom made for each patient before the treatment planning process. Setup errors in the conventional immobilization system using the shell (manual setup) and in the RTRT system (RTRT setup) were compared. Eight patients with pharyngeal tumors were enrolled.
Results: The systematic setup errors were 1.8, 1.6, and 1.1 nun in the manual setup and 0.2, 0.3, and 0.3 mm in the RTRT setup in right-left, craniocaudal, and AP directions, respectively. Statistically significant differences were observed with respect to the variances in setup error (p < 0.001). The systematic and random intrafractional errors were maintained within the ranges of 0.2-0.6 mm and 1.0-2.0 mm, respectively. The rotational systematic and random intrafractional errors were estimated to be 2.2-3.2 degrees and 1.5-1.6 degrees, respectively.
Conclusions: The setup error and planning target volume margin can be significantly reduced using an RTRT system with a mouthpiece and three gold markers. (c) 2006 Elsevier Inc.

DOI： 10.1016/j.ijrobp.2005.11.038

Web of Science

PubMed

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I-125永久挿入治療物理QAガイドライン

山下孝, 高橋豊, 隅田伊織, 佐藤智春, 笈田将皇, 奥村雅彦, 中村穣, 橋本光康, 保科正夫, 水野秀之, 稲葉守男, 海老原弘一, 天野賢二

平成17年度〜平成18年度厚生労働省がん研究助成金土器屋班17-10分担研究課題名：がんの小線源放射線治療の評価と品質管理に関する研究 2006

Reduction of prostate movement using orthogonal diagnostic x-rays of real-time tumor-tracking system and fiducial gold markers

M.Oita, M Ishikawa, R Onimaru, Y Osaka, H Aoyama, K Suzuki, M Fujino, Y Watanabe, K Fujita, H Shirato, K Miyasaka

Proceedings of 1st Hokkaido International Croscutting Symposium Molecular Bio-imaging and 4D Image-guided radiotherapy 65 - 65 2006

Quality assurance of iodine 125 seeds for prostate brachytherapy using an imaging plate

S. Furutani, H. Ikushima, T. Saze, K. Ozaki, Y. Kishida, M. Oita, Y. Takegawa, H. Nishitani

INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS 66 ( 3 ) S697 - S698 2006

Basic study for radiation treatment planning using PET/CT- Accuracy of a table -

Y Kishida, M Oita, H Ikushima, K Osaki, S Furutani, Y Hara, T Sasaki, M Tominaga, Y Takegawa, H Nishitani

Proceedings of 1st Hokkaido International Croscutting Symposium Molecular Bio-imaging and 4D Image-guided radiotherapy 56 - 56 2006

Quality assurance of iodine 125 seeds for prostate brachytherapy using an imaging plate International journal

S. Furutani, H. Ikushima, T. Saze, K. Ozaki, Y. Kishida, M. Oita, Y. Takegawa, H. Nishitani

INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS 66 ( 3 ) S697 - S698 2006

Language：English Publisher：ELSEVIER SCIENCE INC

PURPOSE: OncoSeed is delivered in a sterile environment in the form of a cartridge, so it is impractical to resterilize and reload seeds after calibration. We investigated a new method using an imaging plate dosimetry system to characterize all seeds in the OncoSeed cartridge in a sterile environment. METHODS AND MATERIALS: Seeds within the cartridge were placed on an imaging plate, and the imaging plate irradiated. To remove scatter radiation, and improve spatial resolution of seed images, we used X-ray parallel cross grids. The irradiated imaging plate was scanned using a Bio-imaging Analyzer System, and radioactivity intensities of seed images were given in counts. Counts could be translated to profiles, and each seed within the cartridge was analyzed. RESULTS: Results showed a good correlation between counts and total radioactivity of the seeds within the cartridge. Thus, using a least-squares line, it was possible to characterize a cartridge with unknown apparent activity. By analyzing the profiles, it was possible not only to detect a miscalibrated seed in the cartridge from its relative difference in counts, but also to identify its position in the cartridge. No significant changes in counts were seen between sterile and nonsterile environments. CONCLUSION: Using an imaging plate dosimetry system, all seeds in a cartridge could be characterized in a sterile environment.

笈田将皇, 竹川佳宏, 前澤博, 生島仁史, 尾崎享祐, 西谷弘

放射線生物研究 41 ( 1 ) 42 - 60 2006

Quality control of CT on rail system (FOCAL unit) with a micro-multi leaf collimator (mMLC) using new Gafchromic film for stereotactic radiotherapy

M Oita, Y Takegawa, H Ikushima, K Osaki, S Furutani, H Yagi, Y Nishimoto, M Tominaga, M Sasaki

RADIOTHERAPY AND ONCOLOGY 76 ( S2 ) S228 - S228 2005.9

Estimation of dose distribution from the fluoroscopy in real-time tumor tracking radiotherapy (RTRT) for stereotactic body radiotherapy (SBRT)

M Oita, R Onimaru, K Suzuki, H Aoyama, M Fujino, N Kato, R Kinoshita, K Fujita, H Shirato, K Miyasaka

RADIOTHERAPY AND ONCOLOGY 76 S147 - S147 2005.9

Estimation of fluoroscopic dose in real-time tumor tracking radiotherapy (RTRT) using a commercial based radiotherapy planning system

M.Oita, R Onimaru, K Suzuki, H Aoyama, M Fujino, N Kato, R Kinoshita, K Fujita, H Shirato, K Miyasaka

Radiotherapy and Oncology 76 ( S2 ) 147 - 147 2005

簡易測定ファントムと反射型フィルムを利用したI-125 Seed 線源のQA/QC(放射線治療小線源・シード, 一般研究発表予稿集, 日本放射線技術学会第33回秋季学術大会)

笈田将皇, 八木浩史, 佐々木幹治, 富永正英, 原康夫, 西谷弘

日本放射線技術学会雑誌 61 ( 9 ) 1287 2005

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