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Intravenous urography is a test which x rays the urinary system using intravenous dye for diagnostic purposes. Of the many ways to obtain images of the urinary system, the intravenous injection of a contrast agent has been traditionally considered the best. The kidneys excrete the dye into the urine.
inÂ·traÂ·veÂ·nous pyÂ·eÂ·logÂ·raÂ·phy (IVP), former name for intravenous urography. a radiographic technique for examining the structure and function of the urinary system. A contrast medium is injected intravenously, and serial x-ray films are taken as the medium is cleared from the blood by the kidneys.