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  1. 原著論文

Correction method for the physical dose calculated using Clarkson integration at the center of the spread-out Bragg peak for asymmetric field in carbon-ion radiotherapy

https://repo.qst.go.jp/records/47003
https://repo.qst.go.jp/records/47003
cd181d47-3529-4356-9db0-bd4b5f164bfb
Item type 学術雑誌論文 / Journal Article(1)
公開日 2014-12-16
タイトル
タイトル Correction method for the physical dose calculated using Clarkson integration at the center of the spread-out Bragg peak for asymmetric field in carbon-ion 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_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 Tajiri, Minoru

× Tajiri, Minoru

WEKO 469190

Tajiri, Minoru

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Maeda, Takamasa

× Maeda, Takamasa

WEKO 469191

Maeda, Takamasa

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Isobe, Yosiharu

× Isobe, Yosiharu

WEKO 469192

Isobe, Yosiharu

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Tanimoto, Katsuyuki

× Tanimoto, Katsuyuki

WEKO 469193

Tanimoto, Katsuyuki

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Shibayama, Kouichi

× Shibayama, Kouichi

WEKO 469194

Shibayama, Kouichi

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田尻 稔

× 田尻 稔

WEKO 469195

en 田尻 稔

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前田 貴雅

× 前田 貴雅

WEKO 469196

en 前田 貴雅

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磯部 喜治

× 磯部 喜治

WEKO 469197

en 磯部 喜治

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谷本 克之

× 谷本 克之

WEKO 469198

en 谷本 克之

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柴山 晃一

× 柴山 晃一

WEKO 469199

en 柴山 晃一

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抄録
内容記述タイプ Abstract
内容記述 Purpose: We previously proposed a calculation method using Clarkson integration to obtain the physical dose at the center of the spread-out Bragg peak (SOBP) for a treatment beam, the measurement point of which agrees with the isocenter [Tajiri et al. Med. Phys. 2013; 40: 071733−1−5]. However, at the measurement point which does not agree with the isocenter, the physical dose calculated by this method might have a large error. For this error, we propose a correction method.
Materials and methods: To confirm whether the error can be corrected using in-air off axis ratio (OAR), we measured the physical dose at the center of an asymmetric square field and a symmetric square field and in-air OAR. For beams of which the measurement point does not agree with the isocenter, as applied to prostate cancer patients, the physical dose calculated using Clarkson integration was corrected with in-air OAR.
Results: The maximum difference between the physical dose measured at the center of an asymmetric square field and the product of in-air OAR and the physical dose at the center of a symmetric square field was – 0.12 %. For beams as applied to prostate cancer patients, the differences between the measured physical doses and the physical doses corrected using in-air OAR were –0.17 ± 0.23%.
Conclusions: The physical dose at the measurement point which does not agree with the isocenter, can be obtained from in-air OAR at the isocenter plane and the physical dose at the center of the SOBP on the beam axis.
書誌情報 Physica Medica

巻 30, 号 8, p. 985-988, 発行日 2014-07
ISSN
収録物識別子タイプ ISSN
収録物識別子 1120-1797
DOI
識別子タイプ DOI
関連識別子 10.1016/j.ejmp.2014.07.003
関連サイト
識別子タイプ DOI
関連識別子 http://dx.doi.org/10.1016/j.ejmp.2014.07.003
関連名称 http://dx.doi.org/10.1016/j.ejmp.2014.07.003
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