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. Author manuscript; available in PMC: 2010 Mar 1.
Published in final edited form as: Ultrasound Med Biol. 2008 Dec 10;35(3):416–424. doi: 10.1016/j.ultrasmedbio.2008.09.021

Fig. 7.

Fig. 7

(a) Spectra collected during treatments at 40 W and 20 W TAP. The spectra give the maximum value measured over 40 pulses, at a single raster point. The trailing edge at far right is outside of the pulse, and thus represents the level of system noise. The sweep runs from 0.1 to 5 MHz, and each y division represents 8.1 dB below the reference level of −4.1 dBm. (b) Representation of normalized (with respect to fundamental) spectra at 40 and 20 W TAP; 20 W H2O is the spectrum in degassed water for comparison.