Urography makes images of the bladder, kidneys, and ureters (tubes that connect the kidneys to the bladder). It gives your doctor information about diseases in the urinary tract. Images are made using a CT-scan (CT urography) or x-rays (intravenous urography, or IVU). CT urography is the most accurate imaging technique for diagnosing diseases in the urinary tract. IVU can be used if a CT-scan is not available; however, IVU cannot show abnormal cell growth (tumours) that is small or on the surface. Also, it is not recommended for detecting cancer cells that have spread to the lymph nodes or neighbouring organs.