Carotid artery B ultrasonic examination has shadow how to return a responsibility

Carotid B-ultrasound examination is mainly used for epidemiological investigation of carotid atherosclerosis. Examination can find whether there are abnormalities in carotid artery wall and blood vessel flow velocity. If there is shadow, it means carotid plaque. If it is unstable plaque, endarterectomy can be done.