Dictionary Definition: voiding cystourethrogram
- voiding cystourethrogram
- An x-ray image of your bladder and urethra taken while you urinate. A specially trained technician fills your bladder with a special fluid through a small tube called a urethral catheter. The catheter is removed and you are asked to urinate. During urination, your urethra is clearly visible. This test is also used to look for vesicoureteral reflux. Also called VCUG.