Fig. 1.

Two-dimensional integrated backscatter image from parasternal short-axis view at the papillary muscle level and integrated backscatter measurements at the interventricular septum and posterior wall. An elliptical region of interest of 31 × 31 pixels was placed in the mid anterior septum (upper left) and the posterior wall (upper right) of the mid-LV. The largest region of interest was chosen to cover the myocardium whilst avoiding specular echoes from the endocardium or epicardium.