A voiding cystourethrogram is an X-ray that uses a dye to outline the bladder and the tube leading from the bladder to the outside of the body (urethra).

A voiding cystourethrogram may make visible any physical abnormalities of the urinary tract. It may be done if a person has symptoms that suggest:

• Ongoing bladder or kidney infections.
• Blockage in the urinary system.
• Deformities in the tubes leading from the kidneys to the bladder.
• Problems within the urinary system.