Virtual Colonoscopy — Promising, but Not Ready for Widespread Use

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Abstract
Three-dimensional computed tomographic (CT) colography, or “virtual colonoscopy,” is a promising new imaging method. The technique combines the use of rapid helical CT with computer software capable of rendering images of the whole colon. Using a conventional workstation and a dynamic display of images, a radiologist conducts virtual examinations of the bowel, simulating the way endoscopists view the colon. This method is being promoted by some as a noninvasive screening test for colorectal neoplasia.Virtual colonoscopy has a number of advantages over conventional colonoscopy. With virtual colonoscopy, the examination is performed without sedation in less time than conventional colonoscopy and . . .