An intravenous pyelogram, also called an excretory urogram, is an X-ray exam of the urinary tract. An intravenous pyelogram lets doctors view kidneys, bladder and the tubes that carry urine from kidneys to the bladder (ureters). It may be used to diagnose disorders that affect the urinary tract, such as kidney stones, bladder stones, enlarged prostate, kidney cysts or urinary tract tumors.