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Monte Carlo calculations of correction factors for plastic phantoms in clinical photon and electron beam dosimetry
http://hdl.handle.net/2237/20614
http://hdl.handle.net/2237/2061453fa1dab-7731-451d-87b8-77a675ffc5de
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
Medical_Physics_paer_Phantom_correction_factor.pdf (372.8 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2014-10-24 | |||||
| タイトル | ||||||
| タイトル | Monte Carlo calculations of correction factors for plastic phantoms in clinical photon and electron beam dosimetry | |||||
| 言語 | en | |||||
| 著者 |
Araki, Fujio
× Araki, Fujio× Hanyu, Yuji× Fukuoka, Miyoko× Matsumoto, Kenji× Okumura, Masahiko× Oguchi, Hiroshi |
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| アクセス権 | ||||||
| アクセス権 | open access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
| 権利 | ||||||
| 言語 | en | |||||
| 権利情報 | © 2009 American Association of Physicists in Medicine | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | water-to-plastic ionization conversion factor | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | fluence correction factor | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | wall correction factor | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | chamber-dependent fluence correction factor | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Monte Carlo calculations | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The purpose of this study is to calculate correction factors for plastic water (PW) and plastic water diagnostic-therapy (PWDT) phantoms in clinical photon and electron beam dosimetry using the EGSnrc Monte Carlo code system. A water-to-plastic ionization conversion factor k(pl) for PW and PWDT was computed for several commonly used Farmer-type ionization chambers with different wall materials in the range of 4-18 MV photon beams. For electron beams, a depth-scaling factor c(pl) and a chamber-dependent fluence correction factor h(pl) for both phantoms were also calculated in combination with NACP-02 and Roos plane-parallel ionization chambers in the range of 4-18 MeV. The h(pl) values for the plane-parallel chambers were evaluated from the electron fluence correction factor phi(pl)w and wall correction factors P(wall,w) and P(wall,pl) for a combination of water or plastic materials. The calculated k(pl) and h(pl) values were verified by comparison with the measured values. A set of k(pl) values computed for the Farmer-type chambers was equal to unity within 0.5% for PW and PWDT in photon beams. The k(pl) values also agreed within their combined uncertainty with the measured data. For electron beams, the c(pl) values computed for PW and PWDT were from 0.998 to 1.000 and from 0.992 to 0.997, respectively, in the range of 4-18 MeV. The phi(pl)w values for PW and PWDT were from 0.998 to 1.001 and from 1.004 to 1.001, respectively, at a reference depth in the range of 4-18 MeV. The difference in P(wall) between water and plastic materials for the plane-parallel chambers was 0.8% at a maximum. Finally, h(pl) values evaluated for plastic materials were equal to unity within 0.6% for NACP-02 and Roos chambers. The h(pl) values also agreed within their combined uncertainty with the measured data. The absorbed dose to water from ionization chamber measurements in PW and PWDT plastic materials corresponds to that in water within 1%. Both phantoms can thus be used as a substitute for water for photon and electron dosimetry. | |||||
| 言語 | en | |||||
| 出版者 | ||||||
| 出版者 | AIP Publishing | |||||
| 言語 | en | |||||
| 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 | |||||
| 出版タイプ | ||||||
| 出版タイプ | AM | |||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
| DOI | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1118/1.3151809 | |||||
| ISSN | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 0094-2405 | |||||
| 書誌情報 |
en : Medical Physics 巻 36, 号 7, p. 2992-3001, 発行日 2009-07 |
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| 著者版フラグ | ||||||
| 値 | author | |||||
| URI | ||||||
| 識別子 | http://dx.doi.org/10.1118/1.3151809 | |||||
| 識別子タイプ | DOI | |||||
| URI | ||||||
| 識別子 | http://hdl.handle.net/2237/20614 | |||||
| 識別子タイプ | HDL | |||||
