Figure 3
(a) Original image from the heart overlain with displacement vectors and the vector length indicated by the colors. The black rectangle indicates where the average of the vector components, strain rate, principal strains, and tissue velocity were obtained from, and the red line shows the direction and length of the virtual extensometer used for extracting the data for fractional shortening (b) Displacement color heat maps for early systole stage (c) Displacement color heat maps for end diastole stage.
