Ultrasound uses sound waves instead of radiation to generate snapshots or moving pictures of structures inside the body.

Carotid duplex ultrasonography (CUS) is a useful diagnostic tool for assessing cervical carotid artery disease.

A Carotid ultrasound shows the amount of blood flow in the carotid arteries, the major blood vessels to the brain located on either side of your neck. With this imaging technique, your doctor can see if there is any narrowing of your carotid arteries because of cholesterol deposits or some other problem. This test is often used to evaluate people who have had a stroke or who might be at high risk for one because of reduced blood flow in the carotid arteries.

Preparation:

There is no preparation required for this test.

Procedure:

A technician places the sensor against your skin using a clear gel for application. As the technician moves the sensor back and forth on your neck, different views of the carotid artery appear on the screen. As the equipment measures the blood flow through the artery, you hear a noise that sounds like your heartbeat. The other side of your neck is checked in the same way. This test usually takes 15–30 minutes.

How It Feels:

This procedure is painless.