Fig. 1.

Segmentation of myocardial T1 maps. LV myocardium was segmented into 16 segments (solid gray contours) according to the AHA segmentation scheme (gray dotted lines). Regions at anterior septal and posterior septal ventricular insertions points (VIPs, white dotted contours) were drawn to be as large as possible around maximal T1 times in VIPs, targeting standard deviations (SDs) comparable with lateral myocardium. Blood T1 was derived from a region of interest (b, white solid contour) drawn in the blood pool of the left ventricular cavity