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Evaluation of the field-in-field technique with lung blocks for breast tangential radiotherapy
https://doi.org/10.18999/nagjms.77.3.339
https://doi.org/10.18999/nagjms.77.3.339b5d88755-bae5-4d52-ad1e-820abb613b38
名前 / ファイル | ライセンス | アクション |
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2015-09-04 | |||||
タイトル | ||||||
タイトル | Evaluation of the field-in-field technique with lung blocks for breast tangential radiotherapy | |||||
著者 |
Tanaka, Hidekazu
× Tanaka, Hidekazu× Hayashi, Shinya× Kajiura, Yuichi× Kitahara, Masashi× Matsuyama, Katsuya× Kanematsu, Masayuki× Hoshi, Hiroaki |
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キーワード | ||||||
主題Scheme | Other | |||||
主題 | breast cancer | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | breast-conserving surgery | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | breast radiotherapy | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | field-in-field technique | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | lung blocks | |||||
抄録 | ||||||
内容記述 | Several studies have reported the advantages of the field-in-field (FIF) technique in breast radiotherapy, including dose reduction in the lungs by using lung field blocks. We evaluated the FIF technique with lung blocks for breast tangential radiotherapy. Sixteen patients underwent free breathing (FB) computed tomography (CT), followed by two CT procedures performed during breath hold after light inhalation (IN) and light exhalation (EX). Three radiotherapy plans were created using the FIF technique based on the FB-CT images: one without lung blocks (LB0) and two with lung blocks whose monitor units (MUs) were 5 (LB5) and 10 (LB10), respectively. These plans were copied to the IN-CT and EX-CT images. V20Gy, V30Gy, and V40Gy of the ipsilateral lung and V100%, V95%, and the mean dose (Dmean) to the planning target volume (PTV) were analyzed. The extent of changes in these parameters on the IN-plan and EX-plan compared with the FB-plan was evaluated. V20Gy, V30Gy, and V40Gy were significantly smaller for FB-LB5 and FB-LB10 than for FB-LB0; similar results were obtained for the IN-plan and EX-plan. V100%, V95%, and Dmean were also significant smaller for FB-LB5 and FB-LB10 than for FB-LB0. The extent of changes in V20Gy, V30Gy, and V40Gy on the IN-plan and EX-plan compared with the FB-plan was not statistically significant. Lung blocks were useful for dose reduction in the lung and a simultaneous PTV decrease. This technique should not be applied in the general population. | |||||
内容記述タイプ | Abstract | |||||
出版者 | ||||||
出版者 | Nagoya University Graduate School of Medicine, School of Medicine | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.18999/nagjms.77.3.339 | |||||
ID登録タイプ | JaLC | |||||
ISSN(print) | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0027-7622 | |||||
書誌情報 |
Nagoya Journal of Medical Science 巻 77, 号 3, p. 339-345, 発行日 2015-08 |
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著者版フラグ | ||||||
値 | publisher | |||||
URI | ||||||
識別子 | http://www.med.nagoya-u.ac.jp/medlib/nagoya_j_med_sci/773.html | |||||
識別子タイプ | URI | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2237/22974 | |||||
識別子タイプ | HDL |