Figure 3.

(a) Quad screen displaying the results of Method A1 after placing markers at the base and the apex of the long-axis views, which initiates the calculation of the LV volume (yellow shell). The contour is displayed in three orthogonal planes including a short-axis plane (b). After completing Method A1, corrections of the contour can be carried out (Method A2), and this is demonstrated on the four-chamber view; the green markers indicate points of manual correction and the results are shown in section (c). The correction resulted in a better alignment of the apical bulge (arrow). However, it can be seen in the mid-short-axis view that the derived contour still deviates from the endocardial contour.