Definitions for "Virtual colonoscopy"
A method under study to examine the colon by taking a series of x-rays (called a CT scan) and using a high-powered computer to reconstruct 2-D and 3-D pictures of the interior surfaces of the colon from these x-rays. The pictures can be saved, manipulated to better viewing angles, and reviewed after the procedure, even years later. Also called computed tomography colography.
Advances in computer processing speed and imaging software have allowed for the development of "virtual colonoscopy" (CT colonography). This test still requires an intestinal cleansing but is performed rapidly, without sedation, and without the invasiveness of flexible video colonoscopy. Other intra-abdominal abnormalities may be diagnosed with this screening device. CT colonography is an exciting technique for screening for colon cancer. Images can be viewed shortly after acquisition in a multiplanar reformatted (MPR) display or after processing with the "fly through" view.
Virtual colonoscopy: a way of imaging the colon using air or water introduced into the rectum. Images are taken using a CT scanner. Preparation is still required. The doctor then looks at these images which are reconstructed to show the inside of the colon. This procedure is still in development. Early studies are promising; however the accuracy is not as good as with colonoscopy. If an abnormality is seen, colonoscopy is required to biopsy the abnormal area and attempt to remove any polyps. The main use in the future may be for screening the average risk population for bowel cancer.
a method that allows radiologist to see the lining of the
a new technology that's not widely available and isn't covered by health insurers