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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. 4.

Fig. 4

Normalized near-field pressures in the azimuth-depth plane for a single rectangular piston using parameters identical to those used to generate [13, Fig. 2] and [26, Fig. 13], with width a = 5λ and height b = 7.5λ (b/a = 1.5) calculated in single-precision using 100 abscissas on the GPU. The maximum normalized relative error is 2.6 × 10−6. The horizontal axes are in normalized units of a2/λ in the axial dimension and a/2 in the lateral dimension, and the spatial sampling is λ/16 in each dimension, producing a grid of 61 × 101 points.