Carotid ultrasound is a safe, painless procedure that uses sound waves to examine the blood flow through the carotid arteries.
A carotid intima-media thickness test (CIMT) is used to determine the extent of plaque buildup in the walls of the arteries supplying blood to the head. CIMT uses ultrasound imaging to measure the thickness of the two inner layers of the carotid artery—called the intima and media.
Your two carotid arteries are located on each side of your neck. They deliver blood from your heart to your brain.
Carotid ultrasound tests for blocked or narrowed carotid arteries, which can increase the risk of stroke. The results can help your doctor determine a treatment to lower your stroke risk.