書誌事項
- タイトル別名
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- Quality Assurance Procedure for Assessing Mechanical Accuracy of a Radiation Field Center in Stereotactic Radiotherapy
- テイイ ホウシャセン ショウシャ ニ オケル ホウシャセン アイソセンタ ノ テイリョウテキ カンリ シュホウ ノ コウチク
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説明
Stereotactic radiotherapy requires a quality assurance (QA) program that ensures the mechanical accuracy of a radiation field center. We have proposed a QA method for achieving the above requirement by conducting the Winston Lutz test using an electronic portal image device (EPID). An action limit was defined as three times the standard deviation. Then, the action limits for mean deviations of the radiation field center during collimator rotation, gantry rotation, and couch rotation in clockwise and counterclockwise resulted in 0.11 mm, 0.52 mm, 0.37 mm, and 0.41 mm respectively. Two years after the QA program was launched, the mean deviation of the radiation field center during gantry rotation exceeded the above action limit. Consequently, a mechanical adjustment for the gantry was performed, thereby restoring the accuracy of the radiation field center. A field center shift of 0.5 mm was also observed after a micro multi-leaf collimator was unmounted.
収録刊行物
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- 日本放射線技術学会雑誌
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日本放射線技術学会雑誌 68 (10), 1333-1339, 2012
公益社団法人 日本放射線技術学会
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詳細情報 詳細情報について
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- CRID
- 1390282681339062784
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- NII論文ID
- 10031082173
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- NII書誌ID
- AN00197784
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- COI
- 1:STN:280:DC%2BC3s%2FntlSgsw%3D%3D
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- ISSN
- 18814883
- 03694305
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- NDL書誌ID
- 024064652
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- PubMed
- 23089835
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可