Electronically Cleansed CT Colonagraphy Image Showing Colon Polyp (image) Massachusetts General Hospital Share Print E-Mail Caption This is a CT colonography image, after electronic cleansing, showing an intestinal polyp. The yellow arrow indicating the location of a potential polyp was produced by the computer-aided polyp detection system. Credit Michael Zalis, M.D., Massachusetts General Hospital Imaging Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.