Virtual colonoscopy (CT and MR colonography)

CT and MR colonography performance relies on the use of state-of-the-art scanners and computer workstations as well as adequately trained radiologists who are familiar with interpreting these studies. Both tests currently report excellent sensitivity equal to colonoscopy for clinically significant polyps in high-risk patients when performed at academic centers. However, before clinical screening is performed using these tools, the performance of CT and MR colonography must be confirmed in average-risk populations in a variety of health care settings.