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. Author manuscript; available in PMC: 2010 Apr 13.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2010;57(2):340–352. doi: 10.1109/TUFFC.2010.1414

Fig. 10.

Fig. 10

Size estimation errors using the VFX9-4 transducer for a deep (7cm) ROI and a shallow (3cm) ROI when different spectral estimation methods are used. Panel (a) and (c) are plotted vs. the number of independent A-lines to be averaged when an 11-wavelength axial window is used, while panel (b) and (d) are plotted vs. the axial window length in units of wavelength when 9 independent A-lines are averaged.