Figure 3. 2D visualization of the shear wave propagation and mapping of the shear wave velocity in a two-layer phantom with 0.7% agar in the top and 0.5% agar in the bottom.

(a) Doppler variance images during shear wave propagation. (b) OCT image of the two-layer phantom. There are no obvious differences between the two layers. (c) Time contour map of the shear wave propagation. (d) 2D map of the shear wave velocity. The shear wave velocity changes significantly when the wave travels from the bottom layer to the top layer.