Urography. Radiologist adjusting an X-ray machine before taking a urogram, or pyelogram (urinary tract X-ray), of a female patient. The woman has had an X-ray opaque contrast medium injected into her bloodstream. Her kidneys will slowly filter the medium out of her blood and pass it along her ureters to her blad- der. X-rays are taken before and after the inject- ion. The woman has a urinary tract infection.
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