Functional anatomy of the prostate: implications for treatment planning.

Purpose: To summarize the functional anatomy relevant to prostate cancer treatment planning.

Methods And Materials: Coronal, axial, and sagittal T2 magnetic resonance imaging (MRI) and MRI angiography were fused by mutual information and registered with computed tomography (CT) scan data sets to improve definition of zonal anatomy of the prostate and critical adjacent structures.

Results: The three major prostate zones (inner, outer, and anterior fibromuscular) are visible by T2 MRI imaging.