ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Voiding cystourethrogram. Coloured X-ray of a 54 year old male patient undergoing a voiding cystourethrogram. This procedure involves liquid containing a radio-opaque dye being placed in the bladder via a urinary catheter. The bladder is then X-rayed as the patient empties the bladder. It is used to diagnose vesicoureteral reflux, the backwards flow of urine from the bladder to the kidneys.
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