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Voiding cystourethrogram (VCUG) in a 2-year-old child with urinary infections. An x-ray of the abdomen after contrast material has been dripped into the bladder (large round structure at bottom of picture) shows contrast flowing upward into the ureters and kidneys (long tubes with branches at top) indicating reflux. Reflux should not occur and indicates an abnormality of the valves in the bladder.

Note: Images are shown for illustrative purposes. Do not attempt to draw conclusions or make diagnoses by comparing these images to other medical images, particularly your own. Only qualified physicians should interpret images; the radiologist is the physician expert trained in medical imaging.