Fig. 3
From: Prediction of VMAT delivery accuracy with textural features calculated from fluence maps
Percentages of dose-volumetric parameters for that Spearman’s rank correlation coefficient (r) with p-value of less than 0.05 between the textural feature values and dose-volumetric parameter differences are shown for each textural feature for (a) the Trilogy and (b) the TrueBeam STx. The six texture features which had angular second moment (ASM), inverse difference moment (IDM), contrast, variance, correlation, and entropy were used. The dose-volumetric parameter differences were the differences in the dose-volumetric parameters between original volumetric modulated arc therapy (VMAT) plans and the VMAT plans reconstructed with the machine log files recorded in the linac control system during plan delivery. A total of 156 and 152 dosevolumetric parameters were examined for the Trilogy and the TrueBeam STx, respectively