Fig. 1
From: Carotid artery intima-media thickness and hypertensive heart disease: a short review
B-mode ultrasound image of the common carotid artery (CCA): a border of carotid bulb widening (0 mm), (b) CCA far wall lumen-intima interface, (c) media-adventitia interface. Definitions of the CCA segment for measurement differ depending on study and convention, but are typically measured in the vicinity 0–10 mm proximal to the border of the bulb widening (a) (measurement area highlighted by yellow box). CCA IMT is taken as the distance between (b) and (c)