Figure 1

Division of myocardium into circumferential segments. (A) Epicardial and endocardial borders (blue contours), and borders of transmural MI (red points) are delineated on the LGE image. Myocardial tissue enclosed between MI points is called the infarct segment. The rest of the myocardium is divided into equal segments. Infarct: segment 1; Adjacent: segment 2, and 6; Remote: segment 3, 4, and 5. (B) Landmarks delineated on the LGE image are mapped and located on all zHARP cardiac phases by HARP tracking and myocardium is divided into segments accordingly. Five cardiac phases are selected for demonstration.