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. Author manuscript; available in PMC: 2014 Apr 3.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2013 Nov;60(11):2347–2358. doi: 10.1109/TUFFC.2013.6644738

Fig. 3.

Fig. 3

The mean axial displacement, jitter estimate, and mean normalized cross-correlation (NCC) profiles among the fundamental and harmonic tracking methods acquired in an E = 9 kPa homogeneous, elastic, tissue-mimicking ultrasound phantom with a focal depth of 30 mm. The solid lines correspond to the mean value with shaded error bars representing one standard deviation across ten independent acquisitions recorded at different locations within the phantom. In a) the tracking methods are compared as a function of depth at 0.8 msec following the start of the acoustic radiation force excitation. In b) the tracking methods are compared as a function of time following the start of the acoustic radiation force excitation at a depth of 30 mm.