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Study of general ion recombination for beam monitor used in particle radiotherapy
https://repo.qst.go.jp/records/71752
https://repo.qst.go.jp/records/7175206e176a6-e726-4760-a11d-c7bd19a3bd99
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2015-06-30 | |||||
| タイトル | ||||||
| タイトル | Study of general ion recombination for beam monitor used in particle radiotherapy | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Tansho, Ryohei
× Tansho, Ryohei× Furukawa, Takuji× Hara, Yousuke× Mizushima, Kota× Noda, Koji× Saotome, Naoya× Shirai, Toshiyuki× 丹正 亮平× 古川 卓司× 原 洋介× 水島 康太× 野田 耕司× 早乙女 直也× 白井 敏之 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Heavy ion particles such as carbon ion beams are effective tools for cancer radiotherapy because of the higher dose localization and biological effectiveness by using the characteristic dose distribution with the Bragg peak. In the particle radiotherapy, it is important to conform a dose distribution and deliver prescribed dose to a tumor. An ionization chamber is usually used as a beam monitor to control the prescribed dose to the target. Then new treatment research facility at National Institute of Radiological Science (NIRS) uses beam scanning irradiation system that make uniform dose distribution in the target volume by superposing dose deposit of an individual pencil beam. In order to increase dose concentration to the target and also decrease irradiation time, it is necessary to minimize the pencil beam size and to increase the beam intensity. On the other hand, the localization of the pencil beam with high intensity increases the number of general ion recombination in the beam monitor. Therefore, we need to predict the ion recombination rate in the beam monitor for accurate control of the dose. For our purpose, we developed calculation code to predict the ion recombination rate when the pencil beam scanning is used. The calculation code can divide a pencil beam into a sub region and calculate ion recombination rate in each sub region by using Boag theory. We present the calculation results compared with measurements for verification of our calculation code. |
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| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | The 3rd International Beam Instrumentation Coference (IBIC2014) | |||||
| 発表年月日 | ||||||
| 日付 | 2014-09-17 | |||||
| 日付タイプ | Issued | |||||
