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Updated May 29, 2012

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


A defecography is a test in which X-rays are taken to assess anatomical problems occurring during the process of defecation. In this test, a thick barium paste is placed into the patient's rectum. The patient is then asked to sit on a special toilet to expel the paste. As this is happening, X-ray videos are taken to record the passage of the barium paste through the rectum.

Defecography is not a commonly prescribed procedure. If you are to undergo a defecography procedure, be sure that the procedure is conducted by, and the results are interpreted by, experts in analrectal motility.

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

Also Known As: Barium defecography

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