How is an intravenous urogram (IVU) performed?

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A technology known as linear tomography is used during urography. The x-ray tube and film cassette move over part of the body while the exposure takes place. This motion blurs the overlapping tissues and renders a sharp image of the selected tissue plane. Several of these images are taken as well as other films in different positions. Near the end of the exam, the technologist escorts the patient to the toilet to empty the bladder. Once back on the table, a film is taken of the patient's emptied bladder. After the films are checked by the radiologist, the exam is complete.