COMMON DIAGNOSTIC TESTS

CT/CAT SCAN (computed axial tomography)

A CT/CAT scan is interchangeably referred to as either a CT or CAT scan. This diagnostic test uses x-ray technology to create three-dimensional, computerized images of internal organs. However, unlike a traditional x-ray, CT/CAT scans are able to distinguish between obscured and overlapping parts of the body. CAT scans are also capable of producing images of several different internal components, including soft tissue, blood vessels and bones.

How a CAT scan works
The CAT scan creates detailed images by using x-ray beams that pass through sections of the patient. While lying down on a flat, moving table, the patient enters a circular machine where the images are created by x-ray beams. The beams are aimed at the body in different angles in order to show various "slices" or smaller areas of concentration. The amount of absorbed radiation is then measured through a special detector. A computer analyzes the data received by the detector and transforms the information into a digital image. In some cases, a contrast dye is given to the patient intravenously in order to improve the clarity and definition of the resulting images.

What a CAT scan looks at
Because the CAT scan provides finer detail of various areas of the body, this test is used to examine many different physical forms. Some examples are:

Did you know . . ?
CAT scans are currently being used to examine ancient artifacts including an Egyptian mummy.