The CAT scan machine is usually located in a room of its own. The table on which you lie during your session is located at the center of a donut-shaped scanner. The x-ray technician conducting the scan usually sits behind a window at the side of the room.
CAT scans are painless.
They typically last about 90 minutes. If you're going to have dye injected to give the pictures extra contrast, don't eat or drink anything for 4 to 8 hours before the test. People with this allergy could have a reaction to the dye. Do not wear ANY jewelry to the test. You may encounter the following procedures and equipment during your stay.