Computed tomography (CT) is a test that combines x-rays with computer scans. The scans appear as slices. The result is a detailed picture that may show problems with soft tissue (such as the lining of sinuses), organs (such as the intestines, kidneys, or lungs), and bones. There is a small amount of radiation with CT, but the benefits of this test far outweigh any risk.

For the test, you may be given contrast through an intravenous (IV) line, or by injection. The contrast may make you feel warm or give you a strange taste in your mouth, but this sensation usually passes quickly. You will lie on a platform that slides into a doughnut-shaped hole. It is important that you relax and remain as still as you can. The technologist will ask you to hold your breath for a few seconds during the test. You may have to wait briefly after the test to make sure that the images are readable.

You must have nothing to eat or drink after midnight the night before your test. If the test is scheduled in the afternoon, you may have clear liquids until 6 hours before check-in time. After the test, you can get back to your normal diet and activities right away. Any contrast you were given will pass naturally through your body within a day. We normally receive the results of the test within 7-10 business days. After your physician reviews the report, we will call you with the results.