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Effect of PSNE volume fraction on lesion formation. (A) Volume, (B) distortion, and (C) center shift of lesions as a function of PSNE volume fraction at an acoustic intensity of 550 W/cm2 with VP exposure condition (see Table 1). No statistically significant differences were observed between lesions formed with PSNE volume fractions above 0.004%. Error bars represent the standard deviation from five measurements.
