A carotid ultrasound is a valuable diagnostic tool used to assess blockages in the carotid arteries, which can lead to stroke or transient ischemic attack (mini-stroke). This non-invasive procedure uses sound waves, known as ultrasound, to create detailed images of the blood vessels in the neck and identify any narrowing or blockages that are present. Doctors will typically recommend having a carotid ultrasound if they suspect a patient has an elevated risk of stroke due to age, family history, lifestyle factors such as smoking, or existing conditions like high blood pressure and diabetes.