Mayo Clinic in Scottsdale, Ariz., has announced it has replaced the multiple liters of laxative consumed by people in preparation for a CT colonography with four pills, according to a news release.

A recent study published in the journal Gut compares the efficacy of capsule endoscopy to CT colonography in patients with an incomplete colonoscopy. Of the 100 patients enrolled, capsule endoscopy ...

» How is CT colonography performed? CT colonography takes about 15 minutes. At the beginning of the procedure, the colon is filled with carbon dioxide or air with a tube introduced into the rectum.