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Your CT Scan
CT is short for computed tomography; the test is also called a CAT scan. A CT scan uses X-ray equipment to obtain images from different angles around the body. The information from these images is then processed by computer to show a cross-section of body tissues and organs. A CT scan is particularly useful because it can clearly show several types of tissue—lung, bone, soft tissue, and blood vessels.
The CT scanner is a large, square machine with a hole in the center. You will lie still on a table that can move up or down and slide into and out from the center of the hole. Sometimes a patient is supported by pillows to help hold still during the scan. As the exam proceeds, the table moves slowly into the CT scanner.
Depending on the area of the body being examined, the increments of movement might be so small that they are almost undetectable or large enough that you feel the sensation of motion. Clicking and whirring noises will be present as the table moves. Though the technologist will be able to see and speak to you, you will be alone in the room during the exam.
A CT examination often requires the use of different contrast materials to enhance the visibility of certain tissues or blood vessels. The contrast material might be swallowed, injected through an IV directly into the blood stream, or administered by enema, depending on the type of examination.
A CT examination usually takes five minutes to half an hour. When the exam is over, you might be asked to wait until the images are examined to determine if more images are needed.
To prepare for your CT scan, wear comfortable, loose-fitting clothing. Metal objects can affect the image, so avoid clothing with zippers and snaps. You might also be asked to remove hairpins, jewelry, eyeglasses, hearing aids, and any removable dental work, depending on the part of the body that is being scanned.
Patients are sometimes asked not to eat or drink anything for one or more hours before the exam, depending on the area to be scanned. Women should always inform their doctor or X-ray technologist if there is any possibility that they are pregnant.
After the exam, a radiologist will analyze your images and send a signed report with his or her interpretation to your physician, who will give you the CT scan results. All radiologists at Health Images are Board Certified by the American Board of Radiology and Fellowship trained.
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