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Dynamic splitting of Gaussian pencil beams in heterogeneity-correction algorithms for radiotherapy with heavy charged particles
https://repo.qst.go.jp/records/47578
https://repo.qst.go.jp/records/475781ff73d71-1f1c-4d4e-95ba-c9766e21c363
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
text.pdf (808.2 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2009-02-21 | |||||
| タイトル | ||||||
| タイトル | Dynamic splitting of Gaussian pencil beams in heterogeneity-correction algorithms for radiotherapy with heavy charged particles | |||||
| 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 | |||||
| 著者 |
Kanematsu, Nobuyuki
× Kanematsu, Nobuyuki× Komori, Masataka× Yonai, Shunsuke× Ishizaki, Azusa× Kanematsu, Nobuyuki× Komori, Masataka× Yonai, Shunsuke× Ishizaki, Azusa |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The pencil-beam algorithm is valid only when elementary Gaussian beams are small enough compared to lateral heterogeneity of a medium, which is not always true in actual radiotherapy with protons and ions. This work addresses a solution for the problem. We found approximate self-similarity of Gaussian distributions, with which Gaussian beams can split into narrower and deflecting daughter beams when their sizes have overreached lateral heterogeneity in beam-transport calculation. The effectiveness was assessed in an carbon-ion beam experiment in the presence of steep range compensation, where the splitting calculation reproduced the detour effect amounting up to about 10% in dose or as large as the lateral particle disequilibrium effect. The efficiency was analyzed in calculations for carbon-ion and proton radiations with a heterogeneous phantom model, where the beam splitting increased computing times by factors of 4.7 and 3.2. The present method generally improves accuracy of the pencil-beam algorithm without severe inefficiency. It will therefore be useful for treatment planning and potentially other demanding applications. | |||||
| 書誌情報 |
Physics in Medicine and Biology 巻 54, 号 7, p. 2015-2027, 発行日 2009-04 |
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| 出版者 | ||||||
| 出版者 | IOP Publishing | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0031-9155 | |||||
| PubMed番号 | ||||||
| 識別子タイプ | PMID | |||||
| 関連識別子 | 19287085 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1088/0031-9155/54/7/010 | |||||
| 関連サイト | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1088/0031-9155/54/7/010 | |||||
