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Improvement of spread-out Bragg peak flatness for a carbon-ion beam by the use of a ridge filter with a ripple filter
https://repo.qst.go.jp/records/46496
https://repo.qst.go.jp/records/4649649a96462-dcba-414e-87de-68522ff673a2
| アイテムタイプ | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2013-02-18 | |||||
| タイトル | ||||||
| タイトル | Improvement of spread-out Bragg peak flatness for a carbon-ion beam by the use of a ridge filter with a ripple filter | |||||
| 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 |
Hara, Yousuke
× Hara, Yousuke× Takada, Yoshihisa× Hotta, Kenji× Tansho, Ryohei× Nihei, Tetsuya× Suzuki, Yojiro× Himukai, Takeshi× Matsufuji, Naruhiro× et.al× 原 洋介× 高田 義久× 堀田 健二× 丹正 亮平× 二瓶 哲哉× 鈴木 庸次郎× 日向 猛× 松藤 成弘 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We have developed a novel designmethod of ridge filters for carbon-ion therapy using a broad-beam delivery system to improve the flatness of a biologically effective dose in the spread-out Bragg peak (SOBP). So far, the flatness of the SOBP is limited to about +-5% for carbon beams since the weight control of component Bragg curves composing the SOBP is difficult. This difficulty arises from using a large number of ridge-bar steps (e.g. about 100 for a SOBP width of 60 mm) required to form the SOBP for the pristine Bragg curve with an extremely sharp distal falloff. Instead of using a single ridge filter, we introduce a ripple filter to broaden the Bragg peak so that the number of ridge-bar steps can be reduced to about 30 for SOBP with of 60mmfor the ridge filter designed for the broadened Bragg peak. Thus we can manufacture the ridge filter more accurately and then attain a better flatness of the SOBP due to well-controlled weights of the component Bragg curves.We placed the ripple filter on the same frame of the ridge filter and arranged the direction of the ripple-filter-bar array perpendicular to that of the ridge-filter-bar array. We applied this method to a 290 MeV u-1 carbon-ion beam in Heavy Ion Medical Accelerator in Chiba and verified the effectiveness by measurements. |
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| 書誌情報 |
Physics in Medicine and Biology 巻 57, 号 6, p. 1717-1731, 発行日 2012-05 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0031-9155 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1088/0031-9155/57/6/1717 | |||||
