Contrast Urethrograms

Above: Lateral radiograph of the abdomen and pelvis. The body (B) and neck (N) of the urinary bladder (B) and the urethra are filled with air (negative contrast). The preprostatic urethra appears dilated (arrow). The descending colon is filled with feces (asterisks).

Below: The body (B) and neck (N) of the urinary bladder and the urethra are filled with a radioraphically opaque solution (positive contrast). The preprostatic urethra (Pre-U) appears excessively expanded, relative to the postprostatic (Post-U) and the penile urethra (Pen-U).

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