CTA: Head and Neck

Head and Neck

Risk of stroke increases with age and one major cause of stroke and TIA (transient ischemic attacks) or mini-strokes is blockage of the cerebral arteries inside the head or the carotid arteries, located on the right and left side of the neck. The carotid arteries bring oxygenated blood to the brain. Artery-clogging plaque buildup in the carotid arteries is due to many of the same factors associated with blockages in the heart arteries.

A CTA angiogram of the head and or neck is a noninvasive study only requiring the placement of an IV into the arm. Contrast media, iodine, is injected into the IV. The contrast material helps to highlight the vessels of interest. A CTA of the head is helpful in identifying a small aneurysm or arteriovenous malformation inside the brain. CTA of the neck is used to detect narrowing or obstruction in the carotid arteries. When a stent has been placed to restore blood flow in a diseased artery, CTA will show whether it is serving its purpose.

What To Expect During the Scan

The amount of radiation used is small. This test gives out a radiation dose similar to the amount of radiation you’re naturally exposed to over three years. Contrast dye (iodine) will be used during the CT scan. A small needle connected to an intravenous (IV) line will be put in a vein in your hand or arm. The contrast dye will be injected through the IV during the scan. You may have a warm feeling during the injection. The dye will highlight your blood vessels allowing visualizing them better.

The technologist can see you through a glass window and talk to you through an intercom system.

Moving your head/neck during the scan can cause the pictures to blur. You will be asked to lay still and not swallow during the exam. A CT scan usually takes about 10 minutes to complete.

After the test, patients can return to their normal activities. Your physicians or nurse will call you with results of the scan.

How to Prepare

  • No food or drink four hours prior to test.
  • Drink at least 24 oz of water the day prior to test.
  • Avoid wearing earrings, necklaces or any metal on your chest/neck and head area. If you wear dentures you will be asked to remove them prior to starting the test.
  • Allow 30 minutes for the test. Actual scan only takes about 5-10 minutes.
  • Bring a current list of medications.
  • Notify the CT Department of Iodine Allergy ASAP.