Fig. 6From: Quantitative comparison between carotid plaque hardness and histopathological findings: an observational studyComparison of plaque hardness and echo luminance (hypo, iso, hyper-echoic). The brightness of the narrowest region of the plaque was classified as hypo-echoic, isoechoic, or hyper-echoic based on the brightness of the intima-media complex near the plaqueBack to article page