An ultrasound of the body’s two carotid arteries, which are located on each side of the neck and carry blood from the heart to the brain, provides detailed pictures of these blood vessels and information about the blood flowing through them.
 
Carotid duplex imaging is best non-invasive screening test for carotid artery stenosis.
 
Carotid doppler ultrasound is indicated when medical conditions that increase the risk of stroke, including:

• High blood pressure
• Diabetes
• High cholesterol
• Family history of stroke or heart disease
• Recent transient ischemic attack (TIA) or stroke
• Abnormal sound in carotid arteries (bruit), detected by your doctor using a stethoscope
• Coronary artery disease