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- W2461361295 abstract "Purpose:This study compared the rectal dose-volume consistency, equivalent uniform dose (EUD) and normal tissue complication probability (NTCP) in prostate intensity modulated radiotherapy (IMRT) and volumetric modulated arc therapy (VMAT).Methods:For forty prostate IMRT and fifty VMAT patients treated using the same dose prescription (78 Gy/39 fraction) and dose-volume criteria in inverse planning optimization, the rectal EUD and NTCP were calculated for each patient. The rectal dose-volume consistency, showing the variability of dose-volume histogram (DVH) among patients, was defined and calculated based on the deviation between the mean and corresponding rectal DVH.Results:From both the prostate IMRT and VMAT plans, the rectal EUD and NTCP were found decreasing with the rectal volume. The decrease rates for the IMRT plans (EUD = 0.47 × 10−3 Gy cm−3 and NTCP = 3.94 × 10−2 % cm−3) were higher than those for the VMAT (EUD = 0.28 × 10−3 Gy cm−3 and NTCP = 2.61 × 10−2 % cm−3). In addition, the dependences of the rectal EUD and NTCP on the dose-volume consistency were found very similar between the prostate IMRT and VMAT plans. This shows that both delivery techniques have similar variations of the rectal EUD and NTCP on the dose-volume consistency.Conclusion:Dependences of the dose-volume consistency on the rectal EUD and NTCP were compared between the prostate IMRT and VMAT plans. It is concluded that both rectal EUD and NTCP decreased with an increase of the rectal volume. The variation rates of the rectal EUD and NTCP on the rectal volume were higher for the IMRT plans than VMAT. However, variations of the rectal dose-volume consistency on the rectal EUD and NTCP were found not significant for both delivery techniques." @default.
- W2461361295 created "2016-07-22" @default.
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- W2461361295 date "2016-06-01" @default.
- W2461361295 modified "2023-09-27" @default.
- W2461361295 title "SU-F-T-378: Evaluation of Dose-Volume Variability and Parameters Between Prostate IMRT and VMAT Plans" @default.
- W2461361295 doi "https://doi.org/10.1118/1.4956563" @default.
- W2461361295 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/28048562" @default.
- W2461361295 hasPublicationYear "2016" @default.
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