Review Article

Anatomic Imaging of the Prostate

Figure 3

Coronal image through the prostate. At the apex, the distal urethral becomes surrounded by the low signal-intensity external urethral sphincter (white arrowheads) that extends downward to the urethral bulb (UB) and is embraced by the inferomedial aspect of the levator ani muscle (L). In addition, at the midgland, the ejaculatory ducts join the prostatic urethra at the verumontanum, designated by a high signal-intensity structure (arrow). The prostatic-seminal vesicle angle is also seen best in the coronal plane (black arrowheads).