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. Author manuscript; available in PMC: 2021 Aug 19.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2014 Oct;61(10):1668–1687. doi: 10.1109/TUFFC.2014.006466

Figure 4.

Figure 4.

Peak correlation coefficient as function of distance for tissue echoes indicates that by stepping the tissue sample through the dual focus, signals separated by 1 mm are weakly correlated.