Computed Tomography (CT Scan)

UT Medical Center has five helical CT scanners. Also called a computed axial tomography (CAT) scan, CT is a method of body imaging in which a thin X-ray beam rotates around the patient. Small detectors measure the amount of X-rays that make it through the patient or particular area of interest. A computer analyzes the data to construct a cross-sectional image.

You will be asked to lie on a narrow table that slides into the center of the scanner. Depending on the study being performed, you may need to lie on your stomach, back, or side. If contrast dye is to be administered, an IV will be placed in a small vein of a hand or arm.

Much like standard photographic cameras, any motion you make causes blurred images in CT. Therefore, the operator will give you instructions through an intercom on when to hold your breath and not move.

A CT Scan often is utilized in the trauma setting to evaluate the brain, chest and abdomen. CT can be used to guide interventional procedures such as biopsies and placement of drainage tubes.