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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.
An intravenous pyelogram (IVP) is a special x-ray exam of the kidneys, bladder, and ureters (the tubes that carry urine from the kidneys to the bladder). An IVP is done in a hospital radiology department or a health care provider's office. You may be asked to take some medicine to clear your bowels before the procedure to provide a better view of the urinary tract. You will need to empty your bladder right before the procedure starts.