A technician referred to as a sonographer conducts a carotid ultrasound with a small, handheld system known as a transducer. The transducer emits seem waves and information the echo because the waves bounce off tissues, organs and blood cells. Tobacco use. Nicotine can irritate the inner lining on the arteries. https://www.sgvascularctr.com/revealing-the-latest-innovations-in-carotid-artery-disease-treatment/