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. Author manuscript; available in PMC: 2011 Feb 1.
Published in final edited form as: Ultrasound Med Biol. 2010 Jan 4;36(2):350. doi: 10.1016/j.ultrasmedbio.2009.10.005

Table 4.

Measured pressure gradients around the focus

Pressure gradient
(MPa/mm)		 Frequency (MHz)
23 24 27 30 33 36 37
Voltage
(Vpp)		 22 13.4 17.0 28.1 35.5 33.1 22.1 21.0
32 19.0 24.1 39.4 52.6 47.7 29.4 28.5
41 22.7 31.3 51.1 57.6 64.3 40.0 36.5