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. Author manuscript; available in PMC: 2015 Aug 7.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2015 Jul;62(7):1342–1355. doi: 10.1109/TUFFC.2015.007016

Table 5.

Comparisons among the diameters of the flow channel, −6dB focal zone of the therapy transducer, supra-threshold estimations of focal region, and cavitation cloud diameters.

P(−)LS Flow Channel Diameter −6dB Focal Zone Supra-threshold Estimation Cavitation Cloud Diameter
Major Diameter 30 MPa 4.04 ± 0.49 mm 6.5 mm* 3.70 mm* 3.41 ± 0.54 mm°
36 MPa 5.46 ± 0.36 mm 6.5 mm* 5.30 mm* 4.53 ± 0.65 mm*
Minor Diameter 30 MPa 2.03 ± 0.32 mm 1.3 mm* 1.10 mm* 1.95 ± 0.37 mm°
36 MPa 2.77 ± 0.18 mm 1.3 mm* 1.45 mm* 2.12 ± 0.35 mm*

Two-sided t-tests were performed to compare the diameters of flow channel with the other three. Superscript mark “ * “ indicates that this group is statistically significantly different from the flow channel diameter group. Superscript mark “ ° “ indicates there is no statistically significant difference between this group and the flow channel diameter group.