| http://www.w3.org/ns/prov#value | - You may drink clear liquids up to 2 hours before the exam.PURPOSE: A CT Scan is done to study the skull, brain, sinuses, and facial bones for signs of injuries, tumors, or other disease.WHAT TO EXPECT: You will be positioned on a special movable table, called a couch, with your head inside the opening of the CT scanner (usually donut shaped).
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