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. Author manuscript; available in PMC: 2016 Jul 1.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2015 Jul;62(7):1225–1244. doi: 10.1109/TUFFC.2014.006775

Fig 12.

Fig 12

Using the same ROI as in Figure 11, the shear modulus (left) and the shear viscosity (right) is calculated using both STL and MTL beam sequences. The error bars represent the measurement result when considering only the shear wave data associated with the upper half and the lower half of the purely elastic estimates. The error bars for the STL case are too small to be plotted. In all cases, the range for the MTL measurement is larger than the STL measurement. For the shear viscosity estimates, MTL yields a higher apparent viscosity than STL, converging to the STL result as the WNCC window length increases. The STL result is fixed at μ = 1.22 kPa and η = 0.46 Pa·s regardless of WNCC window length.