Fig. 3
From: Assessment of IMPT versus VMAT plans using different uncertainty scenarios for prostate cancer
Relative frequency distribution of anorectum dose metrics resulting from all uncertainty analysis. Grey hatched distribution is for IMPT dose metrics and red-filled distribution is for VMAT dose metrics. Left column shows comparison between dissimilar modalities with 3 mm geometric uncertainties and right column shows comparison between dissimilar modalities with 5 mm geometric uncertainties