Fig. 1

Ellipsoid prostate volume measurement on axial and coronalT2-weighted MR images.
a, b Total prostate volume (TPV) measurement. a Axial T2 WI showing anteroposterior and right-to-left dimensions. b Coronal T2 WI showing superoinferior dimension of the entire prostate. c, d Transition zone (TZ) volume (TZV) measurement. c Axial T2 WI showing anteroposterior and right-to-left dimensions. d Coronal T2 WI showing superoinferior dimension of the transition zone (TZ) of the prostate