Fig. 4From: Urethra-sparing stereotactic body radiotherapy for prostate cancer: how much can the rectal wall dose be reduced with or without an endorectal balloon?Dosimetric parameters for Bwall. Median DVH from Vmref to Vm5 with ERB and without ERB. Box-and-whisker plots for Vmref, Vm3, Vm4, and Vm5 of V18.1 Gy. Significant relations are shown with gray lines above the boxplots. * is set for P < 0.05 and ** for P < 0.005. Outliers are visible with green dots for out-values (1.5xIQR)Back to article page