CT (Computerized Tomography) Scanning
What is a CT Scan?
A Ct scan is an advanced type of x-ray exam in which multiple x-rays are taken rapidly from a number of different angles around the body and then arranged by a high speed computer into a cross-sectional view of internal organs.
When is it used?
CT scanning is generally used when your doctor needs more detailed diagnostic information than we are able to get from regular x-ray studies.
How do I prepare for a CT scan?
For most CT scans, no preparation is necessary. For other CT scans you may be given special preparation instructions. For example, if you are having a CT scan of your abdomen or pelvis, we will ask you not to eat solid food during the 6 hours before the scan. We will let you know ahead of time if there any advance preparation is needed for your exam.
What happens during the exam?
During the exam we’ll have you lie down on a moving table that slides you into the scanner, which is shaped like a large donut. During the scan the “donut” rotates around you and multiple x-ray beams are passed very quickly through your body at different angles. The images are reassembled by a computer, projected onto a TV screen, and prepared for the radiologist to examine. A solution of dye (also called contrast) may be injected into a vein during the exam so the radiologist can see your internal organs more clearly.
Most exams take only a few minutes to complete. When the exam is over, you are free to go. Our radiologist will examine the scan and send a detailed report to your doctor, who will contact you to discuss the results.
What are the risks with this exam?
CT scans are among the safest exams we do. Your body will be exposed to a very small amount of radiation. Exposure to radiation can be dangerous if you are exposed to it often or in large amounts. However, the amount of radiation you receive in a CT scan is less than you would receive in many other x-ray tests. If you are pregnant, you should not have a CT scan without first discussing the possible risks with your doctor. There is a small risk you will have an allergic reaction to contrast dye. Be sure to tell your health care provider if you know you are allergic to any medications or chemicals such as iodine. We are prepared to immediately handle any allergic reaction you might have, and this seldom presents any problem.