The normal voiding cystourethrogram shows a wide funnel at the bladder neck (Fig. 2). When urethral valves are present the urethra proximal to the distal valve attachments is dilated. In the ...

A voiding cystourethrogram is an X-ray test that visualizes whether dye injected into the bladder (through a catheter) refluxes back into the ureters and whether there are any blockages in the ...