Computed Tomography (CT) >>

What is a CT Scan?

A CT scan uses specialized, rotating x-ray equipment and a digital computer to produce detailed cross-sectional and/or three-dimensional images of body tissues, bones, and organs.

Why do I need it?

A CT exam is very helpful in diagnosing diseases that other conventional xrays may not see.

What are the risks of a CT Scan?

CT scans do involve exposure to radiation which is cumulative. The benefit of receiving an accurate diagnosis generally outweighs the risk associated with radiation exposure, but you should speak with your doctor if you have had multiple CT scans in the past five years. There is a small risk of allergic reaction to the IV contrast material (x-ray dye) that contains iodine.

Please speak to your doctor if you are diabetic, have asthma, a history of kidney problems, or been diagnosed with heart failure, or if you have had a past allergic reaction to contrast material. If there is a chance that you may be pregnant, notify your doctor and/or x-ray technologist.

How do I prepare?

You should wear loose fitting, comfortable clothing that is free of metal and zippers, if possible. Depending upon the exam, fasting may be required or you may have to drink an oral contrast the evening before the test. Most medications may be taken with a very small amount of water. Your doctor will give you specific instructions about your preparation.

What can I expect during the test?

Most CT exams take 20 minutes or less. A technologist will position you on a table that moves slowly through a large, donut-shaped machine. You may be asked to hold still or to hold your breath at certain times. An injection of IV contrast may be required to highlight certain organs and blood vessels. You may temporarily feel a warm sensation from this injection.

How do I find out the results?

When the exam is over, you may be asked to wait until the images are reviewed to determine if more images are needed. A final report will be sent to your doctor who will discuss the results with you. Please note that the radiologist who interprets your CT scan will submit a separate bill to your insurer.

For more information about this test, go to WebMD.