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Prediction of VMAT delivery accuracy with textural features calculated from fluence maps.


ABSTRACT: BACKGROUND:Comprehensively textural feature performance test from volumetric modulated arc therapy (VMAT) fluences to predict plan delivery accuracy. METHODS:A total of 240 VMAT plans for various treatment sites were analyzed, with Trilogy and TrueBeam STx systems. Fluence maps superposed fluences at each control point per plan. The textural features were the angular second moment (ASM), inverse difference moment (IDM), contrast, variance, correlation, and entropy, calculated from fluence maps using three displacement distances. Correlation analysis of textural feature performance as predictors of VMAT delivery accuracy used global gamma passing rates with MapCHECK2 and ArcCHECK dosimeters, and mechanical delivery errors calculated from machine log files. RESULTS:Spearman's rank correlation coefficients (r) of the ASM (d?=?10) to the gamma passing rates with 1%/2?mm using the MapCHECK2 were 0.358 and 0.519, respectively (p?

SUBMITTER: Park JM 

PROVIDER: S-EPMC6929348 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature

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Prediction of VMAT delivery accuracy with textural features calculated from fluence maps.

Park Jong Min JM   Kim Jung-In JI   Park So-Yeon SY  

Radiation oncology (London, England) 20191223 1


<h4>Background</h4>Comprehensively textural feature performance test from volumetric modulated arc therapy (VMAT) fluences to predict plan delivery accuracy.<h4>Methods</h4>A total of 240 VMAT plans for various treatment sites were analyzed, with Trilogy and TrueBeam STx systems. Fluence maps superposed fluences at each control point per plan. The textural features were the angular second moment (ASM), inverse difference moment (IDM), contrast, variance, correlation, and entropy, calculated from  ...[more]

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