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