Quantitative measurements of acoustic emissions from cavitation at the surface of a stone in response to a lithotripter shock wave

The Journal of the Acoustical Society of America
Parag V Chitnis, R O Cleveland

Abstract

Measurements are presented of acoustic emissions from cavitation collapses on the surface of a synthetic kidney stone in response to shock waves (SWs) from an electrohydraulic lithotripter. A fiber optic probe hydrophone was used for pressure measurements, and passive cavitation detection was used to identify acoustic emissions from bubble collapse. At a lithotripter charging voltage of 20 kV, the focused SW incident on the stone surface resulted in a peak pressure of 43 +/- 6 MPa compared to 23 +/- 4 MPa in the free field. The focused SW incident upon the stone appeared to be enhanced due to the acoustic emissions from the forced cavitation collapse of the preexisting bubbles. The peak pressure of the acoustic emission from a bubble collapse was 34 +/- 15 MPa, that is, the same magnitude as the SWs incident on the stone. These data indicate that stresses induced by focused SWs and cavitation collapses are similar in magnitude thus likely play a similar role in stone fragmentation.

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Citations

Apr 2, 2009·Journal of Endourology·Francisco FernándezAchim M Loske
Jun 10, 2008·The Journal of the Acoustical Society of America·Parag V ChitnisRobin O Cleveland
Apr 8, 2010·The Journal of the Acoustical Society of America·Nicholas J ManziMark Wendel
Aug 10, 2010·Ultrasound in Medicine & Biology·James McLaughlanGail Ter Haar
Jun 20, 2008·Ultrasound in Medicine & Biology·T G LeightonP R White
May 31, 2011·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Alexander P DuryeaCharles A Cain
Jun 2, 2016·IEEE Reviews in Biomedical Engineering·Morteza GhorbaniAli Kosar
Sep 11, 2020·Circulation. Cardiovascular Interventions·Keyvan Karimi GalougahiZiad A Ali

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