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One or more diagnostic tests are performed to detect narrowing of the carotid arteries. Carotid stenosis is diagnosed by either a doppler ultrasound of the neck, a CT angiogram (CTA) of the neck, magnetic resonance angiography (MRA), or a cerebral angiogram.
The exam generally includes listening for a swooshing sound (bruit) over the carotid artery in your neck, a sound that's characteristic of a narrowed artery. Your doctor may then test your physical and mental capabilities such as strength, memory and speech. After that, your doctor may recommend: 1  Ultrasound, to assess blood flow and pressure in the carotid arteries. 2  CT or MRI, to look for evidence of stroke or other abnormalities. 3  CT angiography or MR angiography, which provides additional images of blood flow in the carotid arteries. 4  Preparing for your appointment. 5  Treatments and drugs.