Fig. 2From: Association of circulating angiogenesis inhibitors and asymmetric dimethyl arginine with coronary plaque burdenImages from QCA of coronary angiogram before (a) and after (b) digital processing. a Thick arrow shows typical area without significant luminal irregularities. Thin arrows point to luminal narrowing and irregularity. b Post-processing images demonstrating the vessel wall outlined in black and areas with luminal irregularity traced in white Back to article page