| http://www.w3.org/ns/prov#value | - A CT scan may not be advised if you are pregnant.Be sure to discuss these risks with your doctor before the test.What to ExpectPrior to TestYour doctor may tell you to:Avoid eating or drinking anything for 4 hours before the test if contrast will be used.Remove any metal objects, such as jewelry, hearing aids, or dentures..Description of the TestSometimes contrast is necessary.
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