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. Author manuscript; available in PMC: 2015 Jan 1.
Published in final edited form as: Ultrasound Med Biol. 2013 Oct 18;40(1):10.1016/j.ultrasmedbio.2013.08.016. doi: 10.1016/j.ultrasmedbio.2013.08.016

Table 1.

Simulation and experimental results using N = 64 elements. All Rz and Rz,D measurements are made in mm.

Focal Depth, mm Spherical Simulation Hybrid Simulation
 Spherical Experiment Hybrid Experiment
Rz Im·Rz Rz Im·Rz
P1 P2 P1 P2 P1 P2
Rz Nax θ Rz Nax θ Rz Rz,D Rz,D Rz,D Rz,D Rz,D Rz,D
10 1.03 20 2° 9.03 20 10° 8.33 9.16 17.32 12.60 25.41 19.92 23.51
15 1.98 24 6° 15.27 24 6° 15.27 7.82 19.93 18.48 20.67 18.48 20.67
20 3.19 28 4° 18.38 24 8° 15.03 12.84 18.45 19.33 21.70 17.96 22.76
25 4.53 20 8° 15.59 20 8° 15.59 18.46 18.66 20.91 22.39 20.91 22.39
30 6.08 16 8° 18.16 16 8° 18.16 22.87 19.03 20.93 22.18 20.93 22.18
35 7.96 12 6° 16.26 12 10° 15.23 25.81 20.68 19.54 19.33 23.02 21.21
40 9.71 8 8° 19.17 8 8° 19.17 25.69 22.36 21.81 20.98 21.81 20.98