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. Author manuscript; available in PMC: 2013 Dec 1.
Published in final edited form as: BJU Int. 2012 Sep 3;110(11 0 0):E871–E877. doi: 10.1111/j.1464-410X.2012.11382.x

Figure 1.

Figure 1

Schematic of the coupling system. The shock wave generator is 14.0 cm in diameter, and the focal length of the Compact-S is 13.0 cm. In the experimental setup, the coupling interface was located ~7.0 cm from the focal point and was considerably wider (~12 cm) than the acoustic window of the lithotripter (estimated at ~7.5 cm by geometrical acoustics).