Dose impact of rectal gas on prostatic IMRT and VMAT

• Material Type: 博士論文
• Title: Dose impact of rectal gas on prostatic IMRT and VMAT
• Author/Editor: Sasaki, Motoharu; Ikushima, Hitoshi; Tominaga, Masahide; Kamomae, Takeshi; Kishi, Taro; Oita, Masataka; Harada, Masafumi
• Author Heading: Sasaki, Motoharu; Ikushima, Hitoshi; Tominaga, Masahide; Kamomae, Takeshi; Kishi, Taro; Oita, Masataka; Harada, Masafumi
• Publication, Distribution, etc.: Springer Japan
• Publication Date: 2015-11-17
• Publication Date (W3CDTF): 2015-11-17
• Alternative Title: 前立腺IMRTおよびVMATに及ぼす直腸ガスの線量影響
• Periodical title: Japanese Journal of Radiology
• No. or year of volume/issue: 33 12
• Volume: 33
• Issue: 12
• Pages: 723-733
• ISSN (Periodical Title): ISSN : 1867-1071; ISSN : 1867-108X
• Degree grantor/type: 徳島大学
• Date Granted: 2016-03-07
• Dissertation Number: 甲第2906号
• Degree Type: 博士（医学）
• Text Language Code: eng
• Subject Heading: Intensity-modulated radiotherapy; Volumetric-modulated arctherapy; Gas; Prostate cancer; Dose distribution
• Target Audience: 一般
• Note (General): Purpose: In this study, we compared the dose impact of the heterogeneity caused by rectal gas using two methods of treatment planning for intensity-modulated radiotherapy (IMRT) and volumetric-modulated arc therapy (VMAT). Materials and Methods: In addition to the structure set used for the standard treatment plan, we created a structure set for evaluation for each patient. The structure sets for evaluation that were created were transferred to the same iso-center as the respective treatment plans for IMRT and VMAT that were to become the standard. The values were then re-calculated. Results: During the standard prostatic IMRT and VMAT treatment planning, all the subjects met the dose restrictions in place at our hospital. Dose restrictions were fulfilled in the treatment plans for evaluation, excluding those with a clinical target volume (CTV) of V100% and planning target volume (PTV) of D95 when the rectum was excluded. However, in treatment plans for evaluation, IMRT was shown to have a higher concordance rate with standard treatment plans than VMAT. Conclusion: If rectal gas is present during either IMRT or VMAT, a dose decrease will occur in relation to CTV and PTV, suggesting that a plan does not eliminate adverse effects on organs at risk.
• Format (IMT): application/pdf
• Access Restrictions: インターネット公開
• Related Material (DOI): 10.1007/s11604-015-0481-7
• Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）; https://irdb.nii.ac.jp
• Original Data Provider (Database): 徳島大学 : 徳島大学機関リポジトリ

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http://repo.lib.tokushima-u.ac.jp/files/public/10/109667/20170929143215513748/LID201605311003.pdf fulltext

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