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MRI Defecography


Updated May 29, 2012

Written or reviewed by a board-certified physician. See About.com's Medical Review Board.


An MRI defecography uses an MRI to assess the functioning of the muscles of the pelvic floor. This test is used to gain better understanding of factors behind such symptoms as constipation and fecal incontinence.

As with all MRIs, appropriateness of the test for patients with metallic objects in their body should be assessed prior to the procedure. During an MRI defecography, a contrast solution is inserted into the patient's rectum. The patient is then seated on a wooden chair with a toilet within the MRI machine. During the exam, images are taken to assess the anatomy and functioning of the pelvic floor muscles and organs.

The MRI defecography is a fairly rare procedure and there are not many facilities in which the procedure is performed.

Anal Sphincter EMG | Anorectal Manometry | Balloon Expulsion Test | Barium Enema | The Colonic Transit Time Test | Colonoscopy | Defecography | Hydrogen Breath Testing | Lactose Intolerance Testing | Sigmoidoscopy | Upper GI Series | Upper Endoscopy | Virtual Colonoscopy

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