(a)
(b)
Figure 2: (a) After the bladder is filled with contrast through the suprapubic tube, a RUG is performed as the patient is asked to attempt to void. If the bladder neck opens, contrast fills the prostatic urethra, and the membranous urethral defect is seen. (b) When the bladder neck does not open, the length of the defect cannot be determined accurately.