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- W7091036 abstract "The aim of this study was the evaluation of results of IMRT plans verification and derivation of criteria of acceptance for future verifications. The absolute film dosimetry for total planned dose distribution was evaluated. The acceptance criteria were derived for the gamma evaluation concept.About 200 IMRT plans, mainly for head/neck and pelvic regions, were verified using the phantom. The plans were generated using Varian Eclipse treatment planning system. The verification plans were created using the CT images of the phantom. Kodak EDR2 films were placed in the phantom for the measurements of the dose distributions. Two methods of calculation of the gamma factor were compared: Depuydt and in-house developed (INH). The acceptance criteria were derived for the gamma evaluation concept.In about 75% of evaluated plans the fraction of points for which gamma index value < 1 was more than 95% for the calculation algorithm of gamma factor proposed by Depuydt. For the INH algorithm in about 60% of cases the fraction of passing points was more than 95%.The acceptance criteria for IMRT plans verification based on the gamma concept must depend on the quality of equipment and materials used. Also the verification software and the calculation algorithm may influence on the results of verifications.Keywordsgamma evaluationfilm dosimetryIMRT plan verification" @default.
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- W7091036 date "2008-01-01" @default.
- W7091036 modified "2023-09-24" @default.
- W7091036 title "Evaluation of Acceptance Criteria for IMRT Plan Verification Based on Results of Film Dosimetry" @default.
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- W7091036 doi "https://doi.org/10.1007/978-3-540-69367-3_148" @default.
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