Fig. 3From: Twin machines validation for VMAT treatments using electronic portal-imaging device: a multicenter studyComparison of the predicted and effective dose distribution for the twin linacs by center. The X- and Y-axes represent the gamma index result for a 3 %-3 mm analysis for linacs A and B, respectively, for a) center 1, b) center 2, c) center 3 and d) center 4Back to article page