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. Author manuscript; available in PMC: 2012 Sep 1.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2011 Sep;58(9):2001–2012. doi: 10.1109/TUFFC.2011.2044

Fig. 1.

Fig. 1

Types of ultrasound piston alignments considered for GPU implementation: (a) single piston, (b) regular linear array of pistons, and (c) regular 2-D array of pistons. GPU implementations of (b) and (c) take advantage of the complex field generated for a single piston. The azimuth and elevation dimensions are defined to be parallel and perpendicular to the array shown in (b), respectively. The same orientations are also respected for (a) and (c).