1 0 0 0 第112回日本医学物理学会学術大会報告
- 著者
- 垣花 泰政
- 出版者
- 一般社団法人 日本医学物理学会
- 雑誌
- 医学物理 (ISSN:13455354)
- 巻号頁・発行日
- vol.37, no.4, pp.225-227, 2017
1 0 0 0 OA 日本の粒子線治療のあゆみ
- 著者
- 河内 清光
- 出版者
- 一般社団法人 日本医学物理学会
- 雑誌
- 医学物理 (ISSN:13455354)
- 巻号頁・発行日
- vol.30, no.3, pp.91-99, 2011-03-31 (Released:2015-12-26)
- 参考文献数
- 17
Recently, Japan has constructed the largest number of proton and heavy ion therapy facilities in the world. They have produced fruitful results, and now the particle therapy attracts an great attention. The author could fortunately have the opportunity to involve in the research and development of the particle therapy facilities, from the beginning of the entering into National Institute of Radiological Sciences. I started from the investigation of a thermal neutron capture therapy at first, and have been concerned with the development of the facilities for the fast neutron therapy, the proton therapy, and the present heavy ion therapy. Based on these experiences, I would like to review on the history of the particle therapy in Japan and on the latest developments.
1 0 0 0 OA 画像診断支援における機械学習
- 著者
- 根本 充貴 増谷 佳孝 野村 行弘 花岡 昇平 三木 聡一郎 吉川 健啓 林 直人 大友 邦
- 出版者
- 一般社団法人 日本医学物理学会
- 雑誌
- 医学物理 (ISSN:13455354)
- 巻号頁・発行日
- vol.36, no.1, pp.29-34, 2016-05-31 (Released:2016-11-30)
- 参考文献数
- 25
Machine learning algorithms are to analyze any dataset to extract data-driven model, prediction rule, or decision rule from the dataset. Various machine learning algorithms are now used to develop high-performance medical image processing systems such as computer-aided detection (CADe) system which detects clinically significant objects from medical images and computer-aided diagnosis (CADx) system which quantifies malignancy of manually or automatically detected clinical objects. In this paper, we introduce some applications of machine learning algorithms to the development of medical image processing system.
1 0 0 0 OA 加速器中性子源の研究開発によるBNCTの確立に向けて
- 著者
- 熊田 博明
- 出版者
- 一般社団法人 日本医学物理学会
- 雑誌
- 医学物理 (ISSN:13455354)
- 巻号頁・発行日
- vol.32, no.3, pp.104-110, 2013-03-31 (Released:2013-09-30)
- 参考文献数
- 12
1 0 0 0 OA 重粒子線治療等新技術の医療応用に係る放射線防護のあり方に関する研究
- 著者
- 花田 剛士 喜久村 力 児玉 清幸 橋本 成世 金沢 光隆 北川 敦志 須田 利美 前田 和茂 丸山 浩一
- 出版者
- 一般社団法人 日本医学物理学会
- 雑誌
- 医学物理 : 日本医学物理学会機関誌 = Japanese journal of medical physics : an official journal of Japan Society of Medical Physics (ISSN:13455354)
- 巻号頁・発行日
- vol.26, no.1, pp.1-12, 2006-03-31
- 参考文献数
- 14
- 被引用文献数
- 1
Heavy ion therapy using the energetic <SUP>12</SUP>C beam is successfully under way at HIMAC, Japan. The method is more advantageous than traditional radiation therapy in dose concentration owing to the Bragg peak and high relative biological effectiveness. A research study using the <SUP>11</SUP>C beam for heavy ion therapy in the future has been carried out in order to develop the capability of monitoring the dose distribution. Our group has examined the total energy absorption spectrum of the <SUP>11</SUP>C beam in a plastic scintillator. We could clearly observe the total absorption peak of <SUP>11</SUP>C in the energy spectrum and, in addition, we found a broad bump structure was associated with the peak. The bump area occupies 37% of the total spectrum and it probably affects the dose calculation for an accurate treatment planning. We elucidated the mechanism that leads to the structure of the total energy absorption spectra given by <SUP>11</SUP>C and <SUP>12</SUP>C in a block of plastic scintillator. This paper describes the method in detail and gives experimental analysis results which deal with the bump structure. We could explain the bump structure using the energy spectra caused by the fragmentation reactions.