Fig. 4From: Evaluation of multiple institutions’ models for knowledge-based planning of volumetric modulated arc therapy (VMAT) for prostate cancerQuadratic regressions curves between lower limit of estimate dose (ED) and ratio of an OAR’s volume overlapping with PTV to the whole organ volume (Voverlap/Vwhole) for the rectum and bladder with the formulas for all institutes. The horizontal axis is the Voverlap/Vwhole for the rectum (a, b) and bladder (c, d). The vertical axis is the volume receiving 90% of the prescribed dose (V90) to the rectum (a) and bladder (c). The vertical axis is the volume receiving 50% of the prescribed dose (V50) for the rectum (b) and bladder (d). The colors of the dotted lines represent institutes. (Blue: a, Orange: b, Gray: c, Green: d, and Yellow: e)Back to article page