(Computerized Axial Tomography)

Computerized Tomography (sometimes referred to as a CT scan or CAT scan) is a diagnostic examination that combines x-rays and computers. A CT scan allows the radiologist to see the body part displayed as a series of slices, or tomographs, which allows the radiologist to view the body part in two dimensions.

Basically, CT scans consist of a highly sensitive x-ray that is focused on a specific plane of the body. As this beam passes through the body, it is picked up by a detector, which feeds the information it receives into a computer. The computer then analyzes the information on the basis of density. This data is then fed into a tube similar to the tube that displays images on your television screen and a picture of the x-rayed, cross-section of the body is displayed. Bone shows up as white, while gases and liquids show up as black with tissue as varying shades of gray, depending on the density of the tissue.

The information from the two-dimensional computer images can be reconstructed to produce three-dimensional images by modern CT scanners. They can be used to produce virtual images that show what a surgeon would see during an operation.

The CT scanner was originally designed to take x-rays of the brain. Today it is much more advanced and is used for imaging virtually any part of the body. CT scans are often used to detect disorders and bleeding in the brain, tumors and abscesses in the body and can aid in assessing lung disease. In addition, the CT scanner is used to provide images of internal organs such as the kidney, spleen, liver, or spine.

Because CT is an x-ray, you will be asked to wear metal-free clothing (or wear one of our gowns). You will be asked to remove any objects, such as jewelry, watches, and hair clips that might interfere with the imaging. Some CT studies require a contrast agent to enhance the pictures that are taken of your body. You will receive special instructions from your doctor if your exam requires you to take an oral contrast agent in advance. If you are receiving an abdominal scan, for instance, you might be asked not to eat for six hours before the test. In some cases a type of dye is injected into the veins during the test. This makes it easier to see internal organs, and blood vessels.

Lying down, the table will move you through a gantry (large ring) which houses the x-ray tube and a set of detectors. Images are acquired by detectors that pick-up the x-ray that passes through your body.

An experienced board certified radiologist at Central Georgia Diagnostics will read the tests and promptly send the report to your doctor.

approximately 10-30 minutes

As always, please let your doctor or the CT technologist know of any concerns or questions you may have prior to this exam. It is our goal to ensure you have an accurate and comfortable exam.