Fig. 1.

Schematic of the framework to calculate mean contour distance. (Left) Axial view. The contour is divided into 3 regions: Anterior, posterior, and lateral. The regions are defined by 2 orthogonal lines with intersection at the center of mass, and oriented 45° relative to the sagittal and coronal planes. (Right) Sagittal view. The superior and inferior regions of the prostate are defined as the superior-most and inferior-most 6 mm regions of the prostate. Figure used with permission.²⁶