Definitions for "computed axial tomography"
Keywords:  diagnose, slices, rays, scan, barium
a method of examining body organs by scanning them with X rays and using a computer to construct a series of cross-sectional scans along a single axis
A technique in which multiple X-rays of the body are taken from different angles in a very short period of time. These images are collected by a computer to give a series of cross-sectional "slices" of the body. In diagnosing dementia, CT scans can reveal tumors and small strokes in the brain.
CT/CAT scans use x-rays to see the body in a three-dimensional way. Doctors use CT scanning to diagnose and stage cancer. Sometimes it is necessary to use a contrast medium for the images to show up on the computer. One type of contrast medium is injected into a vein and contains iodine. If you are allergic to iodine or shellfish (shellfish contain iodine), please let your technician know. Another type of contrast medium is used when the CT scan involves the gastrointestinal tract. Following the CT scan, you are encouraged to drink fluids to promote elimination of the dye.