CT Scans for Headache and Migraine Diagnosis

Articles On Migraine & Headache Diagnosis

A CT scan uses X-rays and computers to make images of the body. It can sometimes help doctors diagnose headaches and their causes.

You might need one if you have headaches daily or almost every day or have a sudden onset severe headache. Doctors can’t diagnose migraines with the test, though.

How Does a CT Scan Help?

The test can help your doctor rule out other causes of your pain, such as:

• A brain tumor
• An infection of the brain, called an abscess
• The buildup of fluid in the brain, a condition called hydrocephalus
• A sinus blockage
• Injuries
• A bulging, weak part of a brain artery, called an aneurysm, or bleeding in the brain

Is It Uncomfortable or Dangerous?

The test is painless. To get the scan, you'll lie on a table. You may get a shot of "contrast material" into one of your veins, which will help doctors see parts of your brain more clearly on the image.

Be sure to tell the doctor or nurse if you've had an allergic reaction to contrast material in the past. Your doctor will also need to check your kidney function before using contrast. The dyes have iodine, which can cause a reaction in some people.

The CT scanner uses X-rays, but the amount of radiation you get from them is kept to a minimum. But if you are or think you may be pregnant, let the doctor know -- X-rays can be harmful to a growing baby. A child who needs to have a CT scan should get it at a facility that often works with children, so that the lowest possible dose of radiation can be used.

What Happens Afterward?

You can go back to your usual activities and eating habits right after a CT scan.

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