書誌事項
- タイトル別名
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- Impact of Multileaf Collimator Leaf Positioning Accuracy on Intensity Modulated Radiation Therapy
- マルチリーフコリメータ ノ イチ セイド ガ キョウド ヘンチョウ ホウシャセン チリョウ ノ センリョウ ブンプ ニ オヨボス エイキョウ
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説明
In multileaf collimator (MLC)-based intensity modulated radiation therapy (IMRT), the dose is influenced by the uncertainty of MLC driving control. In this study, we examined the influence of MLC driving control accuracy on dose evaluation (gamma analysis) by evaluating 60-day MLC driving control accuracy (stationary positioning accuracy and positioning reproducibility) once a week as well as measuring IMRT dose distribution. The MLC positioning accuracy accompanied variation over time and tended to expand by 0.1 to 0.15 mm in one week and about 1 mm in 60 days. In terms of reproducibility, errors were within 0.2 mm for more than 95%. For prostate IMRT, when MLC stationary positioning accuracy was around 1 mm, no significant difference was observed in the pass rate in gamma analysis. Therefore, the results suggest that regular maintenance by setting a permissible value determined by the MLC positioning accuracy test can be an effective indicator in the future for maintaining the safety of IMRT.
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 67 (5), 497-506, 2011
公益社団法人 日本放射線技術学会
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キーワード
詳細情報 詳細情報について
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- CRID
- 1390282681337851008
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- NII論文ID
- 10028109603
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- NII書誌ID
- AN00197784
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- COI
- 1:STN:280:DC%2BC3MrpvVGrsw%3D%3D
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- ISSN
- 18814883
- 03694305
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- NDL書誌ID
- 11144118
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- PubMed
- 21666373
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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
