前立腺用IMRT固定具を用いたセットアップ精度と至適PTVマージンに関する検討

概要

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Purpose : Positional reproducibility in patients with prostate cancer fixed in the prone position with a set of immobilization devices for external-beam intensity-modulated radiation therapy (IMRT) was evaluated. In addition, the adequacy of our positional error reduction strategy and current planning target volume (PTV) margins was also evaluated. Results : Systematic error was corrected by the positional correction that we executed at the first stage of irradiation. The setup margin that we had calculated was 1.1mm in the L-R direction, 1.3mm in the A-P direction, and 2.7mm in the C-C direction. Conclusion : We determined that the effectiveness of the method of correcting the error margin and the setup accuracy of the fixed method were well maintained.
社団法人日本放射線技術学会の論文
2006-01-20