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. Author manuscript; available in PMC: 2007 May 1.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2007 Feb;54(2):301–312. doi: 10.1109/tuffc.2007.244

Fig. 4.

Fig. 4

The sidelobe level (left) and positional error (right) of the PSFs as a function of offset between the transmit and receive foci of the tracking beam for three transmit beam f-numbers.