of these lesions. Alternatives MRI colonography (MRC) allows similar visualizing without radiation exposure. It can detect larger adenomas and neoplasia with high specificity, but less sensitivity than conventional colonoscopy. Notes References Adapted from public domain Virtual Colonoscopy. National Digestive Diseases Information Clearinghouse. External links RadiologyInfo - The radiology information resource for patients American College of Gastroenterology (ACG) International Foundation for Functional Gastrointestinal Disorders (IFFGD) Virtual colonoscopy information and articles from Viatronix Digestive system imaging X-ray computed tomography Articles containing video clips Large intestine Cancer screening