Fig. 6. Ultrasonography and contrast-enhanced ultrasonography findings in carotid dissection.

A. Color Doppler image shows narrowing of the common carotid artery lumen by a hypoechoic area possibly exhibiting reversed flow, which was not well visualized tdue to slow flow velocity. B, C. An early contrast-enhanced ultrasonography image (B) and one taken a couple of seconds later (C) show the true lumen enhancing earlier and the false lumen enhancing later. An intimal flap appears anechoic and separates the two lumens.