CT Scan
Alternate Names : CAT Scan, Computed Axial Tomography (CAT) Scan
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How to Prepare for the Test?
The patient may be asked to drink oral contrast either immediately prior to, or 4 to 6 hours before, the CT scan. The contrast may be composed of non-reactive (inert) chalky-tasting barium sulfate, which will eventually pass in the stools, or absorbable clear Gastrografin solution. The health care provider may also advise fasting (no solids or liquids) for 4 to 6 hours if contrast dye is to be used.
The CT scanner has a weight limit to prevent damage to the mechanized gantry. Have the health care provider contact the scanner operator if you weigh more than 300 pounds.
Since metal is very, very dense, the x-ray beam has difficulty passing through it and results in errors in the involved constructed slices (artifact). Therefore, the patient will be asked to remove jewelry and wear a hospital gown during the study.
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