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. Author manuscript; available in PMC: 2011 Aug 10.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2010 Dec;57(12):2828–2832. doi: 10.1109/TUFFC.2010.1756

Fig. 1.

Fig. 1

Simulated backscattered coefficients using various ROI sizes of (a) 5 spatial pulse lengths (SPL) axially by 1 beamwidth (BW) laterally, (b) 5 SPL axially by 2 BW laterally, (c) 10 SPL axially by 1 BW laterally, and (d) 10 SPL axially by 2 BW laterally. Circle, asterisk, square, and triangle denote results from the non-Welch method with rectangular window, conventional Welch method, the new method, and the theoretical backscatter coefficient (BSC), respectively.