The Harvard Medical School Family Health Guide
Diagnostic Tests - Abdominal CT Scan
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What happens when the test is performed?

  • The test is done in the radiology department of a hospital or in a diagnostic clinic. You wear a hospital gown and lie on your back on a table that can slide back and forth through the donut-shaped CT machine. A technician or other health care professional inserts an IV and injects more contrast dye through it. This dye outlines blood vessels and soft tissue to help them show up clearly on the pictures.

    The technologist moves the table with a remote control to enable the CT machine to scan your body from all of the desired angles. You will be asked to hold your breath for a few seconds each time a new level is scanned. The technologist usually works the controls from an adjoining room, watching through a window and sometimes speaking to you through a microphone. A CT scan takes about 30–45 minutes. Although it’s not painful, you might find it uncomfortable if you don’t like to lie still for extended periods.
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