[Normal echographic anatomy of the penis and the perineum]

Sonourethrography has recently become available for evaluating the urethra. To perform this procedure correctly, precise knowledge of the ultrasound anatomy of the penis and perineum is required. Sixty-one males were studied using the 7.5 Mhz ultrasound transducer. During sonographic evaluation the site where the suspensory ligament of the penis is attached must be identified routinely. The nothc of the compressor nudae muscle in the posterior bulbous urethra can be visualized occasionally. The origin of the membranous urethra and urogenital diaphragm can be identified upon visualizing the entire urethral bulb and the cavernous bulb muscle.