Skip navigation

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

URL of this page: //medlineplus.gov/ency/imagepages/19966.htm

Carotid duplex ultrasound

Creutzfeldt-Jakob disease

Overview

This duplex Doppler sonogram shows an irregular plaque in the carotid artery. This type of plaque can cause clots to form, which can cause a stroke. Doppler studies are used to help identify these types of plaques ahead of time to prevent a stroke from happening.

Review Date 7/26/2022

Updated by: Evelyn O. Berman, MD, Assistant Professor of Neurology and Pediatrics at University of Rochester, Rochester, NY. Review provided by VeriMed Healthcare Network. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.