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Peak positive (P+, top) and negative (P−, bottom) pressure as a function of power level (PL1–11) for the LG-380 lithotripter. Each point shows the mean and standard deviation for 10 sets of SWs (20–30 SWs per set) from pooled data collected using five different LG-380 lithotripters. Shockwaves were measured at the target point. Average P+ at the highest power level (PL-11) was ∼21 MPa.
