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. Author manuscript; available in PMC: 2010 Apr 26.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2008 Feb;55(2):368–383. doi: 10.1109/TUFFC.2008.655

Fig. 15.

Fig. 15

Comparison between the time-invariant FHO based on EKF estimates and the measured responses in medium and stiff phantoms: (a) pulse response, and (b) magnitude response.