The present role of CTC is the integration as a replacement for barium enema in the case of incomplete colonoscopy. In fact ,since 2006 the American Gastroenterological Association (AGA) Clinical Practice and Economics Committee has endorsed CTC as the method of choice for colon investigation in cases of incomplete colonoscopy and numerous evidence exists in the literature showing a clear superiority of CTC over Barium Enema in the detection of CRC and polyps.