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. Author manuscript; available in PMC: 2016 Apr 15.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2014 Feb;61(2):288–301. doi: 10.1109/TUFFC.2014.6722614

Fig. 4.

Fig. 4

(a) Simulation of Normalized Pressure field of one diverging wave for an angular sector of 90° at a depth of R=6 cm for increasing number of transmit elements (1 to 64). (b) shows the simulated maximum synthetic pressure when three sources were used as a function of subaperture size (red plot). The associated resolution (inverse of the main lobe −6dB width) when virtual sources were placed at the center of subaperture is plotted in blue.