Fig. 7.

STL-SWEI shear wave speed C-scan from the center tracking beam voxel, at the focal depth. The shear wave speed is reconstructed without any spatial smoothing from in the inverse of the slope of the arrival times in figure 6: $\text{SWS}=1/\sqrt{{({\nabla }_{x_p}T)}^2+{({\nabla }_{y_p}T)}^2}$