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Computed Tomography (CT) Scan of the Head and Face
About this test
- Test Overview
-
Health Tools
- Why It Is Done
- How To Prepare
- How It Is Done
- How It Feels
- Risks
- Results
- What Affects the Test
- What To Think About
- References
- Credits
A computed tomography (CT) scan uses X-rays to make pictures of the head and face.
During the test, you will lie on a table that is attached to the CT scanner, which is a large doughnut-shaped machine. Your head will be positioned inside the scanner. The CT scanner sends X-rays through the head. Each rotation of the scanner takes a second and provides a picture of a thin slice of the head and face. One part of the scanning machine can tilt to take pictures from different positions. All of the pictures are saved as a group on a computer. They also can be printed.
An iodine dye (contrast material) is often used to make structures and organs easier to see on the CT pictures. The dye may be used to check blood flow, find tumors, and look for other problems. Dye can be put in a vein (IV) in your arm. CT pictures may be taken before and after the dye is used.
A CT scan of the head can give some information about the eyes, facial bones, air-filled cavities (sinuses) within the bones around the nose, and the inner ear. If these areas are of concern, a specific CT scan of the area is usually done.
A CT scan of the head may be used to evaluate headaches. For more information, see:
| By: | Healthwise Staff | Last Revised: May 21, 2010 |
| Medical Review: | Adam Husney, MD - Family Medicine Howard Schaff, MD - Diagnostic Radiology | |
© 1995-2011 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated. This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions.
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