computed tomography colography

(kum-PYOO-ted toh-MAH-gruh-fee koh-LAH-gruh-fee) 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 virtual colonoscopy.