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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. 7.

Fig. 7

Parametric mesh surfaces of scatterer size estimates vs. axial and lateral analysis block size at a 7cm depth using the VFX9-4 transducer. The axial window length is in units of wavelength, the lateral block size is in units of the number of independent A-lines, and the Gaussian SAF scatterer size estimates are in units of μm. In figures (a) and (c), the imaginary scatterer size estimates are handled by discarding them, while in figures (b) and (d), imaginary scatterer size estimates are handled by assigning them to be 5 μm. Note that for visualization purposes, the viewing angles of the graphs are different. The smaller axial and lateral resolution points to the paper for (a) and (c), while it points to the reader for (b) and (d). Figures (a) and (b) are the results calculated using the Welch method, while figures (c) and (d) are calculated using a rectangular window.