Fig. 1From: Semi-automatic carotid intraplaque hemorrhage detection and quantification on Magnetization-Prepared Rapid Acquisition Gradient-Echo (MP-RAGE) with optimized threshold selectionMP-RAGE image slice with reference contours. The reference region was confined by an ROI (yellow circle) centered at the carotid artery with a diameter of 4 cm, while the IPH detection area was confined by the out wall boundary (blue). The three references were 1) mean intensity of SCM (sternocleidomastoid muscle, pink), 2) mean intensity of adjacent muscle (green) isointense with the normal carotid artery wall, and 3) median intensity within the ROIBack to article page