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. Author manuscript; available in PMC: 2013 Feb 1.
Published in final edited form as: Ultrasound Med Biol. 2011 Dec 16;38(2):312–323. doi: 10.1016/j.ultrasmedbio.2011.10.014

Figure 2.

Figure 2

Figure 2

Figure 2

Figure 2

Figure 2

Figure 2

A simulation result showing the behavior of crawling waves. (a) shows the shear speed distribution having a 1 cm inclusion inside a background medium of 3m/s. (b) shows the amplitude distribution of the left and right signal without boundary reflection as a product of source magnitude, attenuation and amplitude factor. (c) displays the crawling wave movement without reflection while (d) shows the same movement with boundary reflection of 0.5 at both sides, causing the amplitude variation pulsating in a regular pattern. The unwrapped phase distribution is shown in (e), where it is clear that the phase for (d) is corrupted with a sinusoidal component. The estimated shear speed for phase distribution of (e) is shown in (f).