THE MEDICAL IMAGING EXPERIENCE
INFORMATION FOR THE PATIENT
C.T. SCAN OF THE HEAD OR NECK

WHAT IS IT?
C.T. also called CAT Scan (Computerized Axial Tomography) is achieved by rotating an x-ray beam around the patient. The x-ray pictures are then processed in a computer. The computer processed images show cross-sectional images - like turning the body into a loaf of bread, and cutting it up into slices. The final computer images are displayed on film much like an x-ray.

WHAT WILL HAPPEN TO ME?
The CT technologist will assist you to lie down on a long narrow table. If needed, an IV (Intravenous) needle will be inserted in the vein of your arm. The needle is connected to a power injector machine that is programmed to inject a dye (contrast media) that will outline the blood vessels in your body during the CT scan. Once the IV is connected the technologist will move you into the center of the CT scanner which looks like a very large square donut. After the scan is complete, the CT technologist will remove you from the CT scanner and take the IV needle out of your arm.

HOW LONG WILL THIS TEST TAKE?
The scan takes about 10-20 minutes to complete although you will be in the CT scan room for about 30 minutes so that the IV, if needed, can be connected and other scan preparations can be completed.

WHAT WILL I FEEL -- WILL IT HURT?
You will need to lie still once you are placed into the CT scanner so that the best pictures can be made. You may feel a general warming sensation once the dye is injected. You will not see the x-ray equipment rotate around you during the scan but you will hear the movement of the x-ray tube as it travels on its circular track inside the CT scanner.

WHAT WILL THE TEST SHOW?
The CT pictures show a unique view of the structures inside of your head and neck. The veins are outlined by the dye injection and become visible in the CT pictures. Sections of bones, tissue, and the brain can be viewed without the interference of overlying structures. If there are any abnormal area caused by injury, internal bleeding, tumors or unusual blood vessel patterns they can be seen on the CT images.

HOW DO I GET READY?
You will need to remove any hairpins, safety pins, earrings and necklaces from your head and neck area since these will interfere with the CT x-rays. You may need to wear a short sleeve hospital gown so that the IV can be started. Do not eat or drink anything for four (4) hours prior to your exam. You should continue to take any medications as prescribed by your doctor. You may want to empty your bladder before going to the CT Department so you are as comfortable as possible during the scan.

Reviewed: March 2005