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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. 3.

Fig. 3

BSC noise index per sample points (T-value), obtained from experimental data derived as described in Section 3.4 using the Siemens VFX13-5 transducer. (a) displays the T-value using the Welch method vs. the number (1 – 21) of independent RF segments for averaging spectral values and for different RF segment sizes (3 – 21 center frequency wavelengths). (b) T-values using an 11-wavelength window-length, vs. the number of independent RF segments averaged and (c) T-values using 9 independent RF segments averaged, vs. window-length in units of center frequency wavelength.