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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.
Intravenous urography (also known as intravenous pyelography) is an X-ray procedure which is used to assess problems in the kidneys, ureters, bladder and urethra. These structures make up the urinary tract. The ureters are tubes which go from each kidney to the bladder. The urethra is the tube from the bladder that passes out urine. The urinary tract does not show up well on ordinary X-ray pictures. However, with intravenous urography a contrast dye is injected into a vein ('intravenous' injection).