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MR Urogram - Benefits and Risks


  • Both CT and MR urogram have proven effective in detecting issues or abnormalities in parts of the urinary tract including the kidneys, bladder and ureters, or as a follow-up test to further examine for recurrent or new cancers of the urinary tract.
  • Compared to other imaging tests, CT and MR urogram both provide superior anatomic detail of the urinary tract and surrounding structures.
  • MRI is a noninvasive imaging technique that does not involve exposure to ionizing radiation.
  • MRI enables the discovery of abnormalities that might be obscured by bone with other imaging methods.


  • The MRI examination poses almost no risk to the average patient.
  • Some patients experience greater claustrophobia with an MRI exam.
  • If sedation is used, there are risks of excessive sedation. The technologist or nurse monitors your vital signs to minimize this risk.
  • There is a very slight risk of an allergic reaction if contrast material is injected. If you experience allergic symptoms, a radiologist or other physician will be available for immediate assistance.
  • Nephrogenic systemic fibrosis is a serious, but rare complication believed to be caused by the injection of gadolinium contrast material in patients with very poor kidney function.