Fig. 2

Locations of the regions of interest (ROIs) for signal to noise ratio, contrast to noise ratio, and myocardium homogeneity. A–G The ROIs in both proximal and distal segments of coronary arteries was as large as possible while avoiding the inclusion of the calcification, plaque, and wall. H In addition, myocardial contrast homogeneity was measured by placing the 10-mm² ROI in the inferoseptal (red), anteroseptal (blue), anterior (green), anterolateral (black), inferolateral (yellow), and inferior (orange) of the left ventricle in the midventricular