A computed tomography (CT) scan uses X-rays to make detailed pictures of parts of your body and the structures inside your body. During the test, you will lie on a table that is attached to the CT scanner. The CT scanner is a large doughnut-shaped machine.
Doctors use CT scans to study areas of the body, such as the brain, chest, belly, spine, bones, or joints. CT scans are also used to assist with or check on the success of a procedure or surgery.
In general, there's nothing you have to do before this test, unless your doctor tells you to.
Tell your doctor if you get nervous in tight spaces. You may get a medicine to help you relax. If you think you'll get this medicine, be sure you have someone to take you home.
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