virtual colonoscopy…

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what the risks are colonoscopy, virtual virtual colonoscopy, vc, combines mri or ct scans with sophisticated computer software to produce images, the colon, rectum, is less invasive than conventional colonoscopy, detects polyps, in the colon, patients must follow a strict bowel-emptying procedure the day, they would, standard colonoscopy, test is performed, in the radiology a hospital, medical center, unlike conventional colonoscopy, no sedatives, no scope is used, lie down on left side on a narrow table that is connected to an mri, ct machine, knees, up toward chest, a small, flexible tube, inserted into rectum, air is pumped, the tube to make the colon bigger, easier, after this, you'll be asked, lie on back, next, table slides into a large tunnel, the machine, where x-rays create images of colon, must stay very still, movement, blur the pictures, hold breath briefly each picture is taken, a computer combines all the images to form a three-dimensional picture, the colon, viewed on a video monitor, pictures, taken lie on stomach, exam takes, 20 minutes, preparations, depending on health care provider, everyone undergoing any type of colonoscopy must completely empty bowels, the exam, done using an enema, laxatives combined, a liquid diet the day, bowel must be completely emptied, no solid matter remains, unfortunately, diarrhea is common, drink plenty of clear liquids, apple juice, chicken broth, to avoid dehydration, make sure tell health care provider, medications, you'll be told, take, should temporarily stop, ct, mri scanners, very sensitive to metals, don't wear jewelry the day of exam, you'll be asked, wear a hospital gown, the procedure, x-rays, painless, pumping air, colon, create temporary cramping, gas pains, virtual colonoscopy performed to, diagnose colorectal cancer, look, polyps, follow up after an incomplete, failed colonoscopy, follow up after a previous finding of colon cancer, polyps, examine those with a family history of colon cancer, normal findings, images of a healthy intestinal tract, polyps, colorectal cancer, diverticulosis, lower gastrointestinal, gi, bleeding, tumor, inflammatory bowel disease, radiation exposure, nausea, vomiting, bloating, rectal irritation caused prep medications, differences between virtual, conventional colonoscopy, virtual colonoscopy uses no sedation, patients, able to resume normal activities immediately, conventional colonoscopy involves sedation, the loss of a work day, a polyp is found, virtual colonoscopy, patient must have a conventional colonoscopy to remove the abnormality, conventional colonoscopy allows, the immediate removal of polyps, procedures, spot polyps, reached a large, worrisome size, virtual colonoscopy, detailed, a conventional colonoscopy, miss polyps smaller than 10 millimeters in diameter, flat lesions, virtual colonoscopy is not currently recommended, a screening tool, the early detection of colon cancer, routine screening, colon cancer involves conventional colonoscopy, tests, virtual colonoscopy, medical letter, february 14, 1202, van dam, j, et al, ct colonography, gastroenterology, 127, 970-984 , lieberman, d, colonoscopy, gold, ann intern med, 141, 401-403 , pickhardt, p, et al, location of adenomas missed by optical colonoscopy, ann intern med, 141, 352-359.