Fig. 2From: Quantitative comparison between carotid plaque hardness and histopathological findings: an observational studya Single-lens reflex digital camera fixed on the table for specimen photography. b Image of EVG-stained specimen taken by the camera. c Post-automatic image quality adjustment. d Grayscale converted image manually surrounded by ROIs of intima and plaque. e Grayscale image converted to a histogram and the median value determinedBack to article page