WEKO3
アイテム
Microdosimetric study for secondary neutrons in phantom produced by a 290 MeV/nucleon carbon beam
https://repo.qst.go.jp/records/45185
https://repo.qst.go.jp/records/45185bb16e21b-056a-4079-be1a-39ba3ed832a3
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2008-06-11 | |||||
| タイトル | ||||||
| タイトル | Microdosimetric study for secondary neutrons in phantom produced by a 290 MeV/nucleon carbon beam | |||||
| 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_6501 | |||||
| 資源タイプ | journal article | |||||
| 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 |
Endo, Satoru
× Endo, Satoru× Takada, Masashi× Tanaka, Ken-ichi× Onizuka, Yoshihiko× Miyahara, Nobuyuki× Sato, Tatsuhiko× Ishikawa, Masayori× Maeda, Naoko× Hayabuchi, Naofumi× Shizuma, Kiyoshi× Hoshi, Masaharu× 遠藤 暁× 高田 真志× 田中 憲一× 鬼塚 昌彦× 宮原 信幸× 前田 直子× 早渕 尚文× 静間 清× 星 正治 |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Absorbed doses from main charged-particle beams and charged-particle fragments have been measured with high accuracy for particle therapy, but there are few reports for doses from neutron components produced as fragments. This study describes the measurements on neutron doses produced by carbon beams; microdosimetric distributions of secondary neutrons produced by 290 MeV/nucleon carbon beams have been measured by using a tissue equivalent proportional counter at the Heavy Ion Medical Accelerator in Chiba, Japan at the National Institute of Radiological Sciences. The microdosimetric distributions of the secondary neutron were measured on the distal and lateral faces of a body-simulated acrylic phantom (300 mm heightx300 mm width x253 mm thickness). To confirm the dose measurements, the neutron energy spectra produced by incident carbon beams in the acrylic phantom were simulated by the particle and heavy ion transport code system. The absorbed doses obtained by multiplying the simulated neutron energy spectra with the kerma factor calculated by MCNPX agree with the corresponding experimental data fairly well. Downstream of the Bragg peak, the ratio of the neutron dose to the carbon dose at the Bragg peak was found to be a maximum of 1.4x10−4 and the ratio of neutron dose was a maximum of 3.0x10−7 at a lateral face of the acrylic phantom. The ratios of neutrons to charged particle fragments were 11% to 89% in the absorbed doses at the lateral and the distal faces of the acrylic phantom. We can conclude that the treatment dose will not induce serious secondary neutron effects at distances greater than 90 mm from the Bragg peak in carbon particle therapy. | |||||
| 書誌情報 |
Medical Physics 巻 34, 号 9, p. 3571-3578, 発行日 2007-09 |
|||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0094-2405 | |||||
