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The wave propagation measured with 3D-OCT at three different time points demonstrate most of energy cannot be transmitted in the heterogeneous phantom with excitation in the 3% gelatin. (a) The reconstruction artifact in the 3% gelatin in the 4D-OCE phase velocity for = 181 Hz is due to almost zero energy carried to that area. (b), (c) and (d) show 4D-OCT wave propagations at time 2 ms, 4 ms and 6 ms and illustrate the energy are reflected.
