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. Author manuscript; available in PMC: 2017 Aug 10.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2016 Jan 8;63(2):336–351. doi: 10.1109/TUFFC.2015.2513958

Fig. 1.

Fig. 1

(Left) Illustration of the planar reflector technique and (right) illustration of the reference phantom technique.