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Impact of pitch angle setup error and setup error correction on dose distribution in volumetric modulated arc therapy for prostate cancer
http://hdl.handle.net/2297/44821
http://hdl.handle.net/2297/44821f646984b-ccd0-493b-9566-fe303593fd3f
名前 / ファイル | ライセンス | アクション |
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ME-PR-TAKEMURA-A-178.pdf (1.1 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2017-10-03 | |||||
タイトル | ||||||
タイトル | Impact of pitch angle setup error and setup error correction on dose distribution in volumetric modulated arc therapy for prostate cancer | |||||
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 |
Takemura, Akihiro
× Takemura, Akihiro× Togawa, Kumiko× Yokoi, Tomohiro× Ueda, Shinichi× Noto, Kimiya× Kojima, Hironori× Isomura, Naoki× Kumano, Tomoyasu |
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書誌情報 |
Radiological Physics and Technology 巻 9, 号 2, p. 178-186, 発行日 2016-07-01 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1865-0333 | |||||
NCID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA12236881 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1007/s12194-016-0347-4 | |||||
出版者 | ||||||
出版者 | 日本放射線技術学会, 日本医学物理学会 = Japanese Society of Radiological Technology and Japan Society of Medical Physics / Springer-Verlag | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | In volumetric modulated arc therapy (VMAT) for prostate cancer, a positional and rotational error correction is performed according to the position and angle of the prostate. The correction often involves body leaning, and there is concern regarding variation in the dose distribution. Our purpose in this study was to evaluate the impact of body pitch rotation on the dose distribution regarding VMAT. Treatment plans were obtained retrospectively from eight patients with prostate cancer. The body in the computed tomography images for the original VMAT plan was shifted to create VMAT plans with virtual pitch angle errors of ±1.5° and ±3°. Dose distributions for the tilted plans were recalculated with use of the same beam arrangement as that used for the original VMAT plan. The mean value of the maximum dose differences in the dose distributions between the original VMAT plan and the tilted plans was 2.98 ± 0.96 %. The value of the homogeneity index for the planning target volume (PTV) had an increasing trend according to the pitch angle error, and the values of the D95 for the PTV and D2ml, V50, V60, and V70 for the rectum had decreasing trends (p < 0.05). However, there was no correlation between differences in these indexes and the maximum dose difference. The pitch angle error caused by body leaning had little effect on the dose distribution; in contrast, the pitch angle correction reduced the effects of organ displacement and improved these indexes. Thus, the pitch angle setup error in VMAT for prostate cancer should be corrected. © 2016 Japanese Society of Radiological Technology and Japan Society of Medical Physics | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Embargo Perios 12 months | |||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa |