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Energy shielding by cavitation bubble clouds in burst wave lithotripsy

Maeda, Kazuki and Maxwell, Adam D. and Colonius, Tim and Kreider, Wayne and Bailey, Michael R. (2018) Energy shielding by cavitation bubble clouds in burst wave lithotripsy. Journal of the Acoustical Society of America, 144 (5). pp. 2952-2961. ISSN 0001-4966. PMCID PMC6258362. doi:10.1121/1.5079641.

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Combined laboratory experiment and numerical simulation are conducted on bubble clouds nucleated on the surface of a model kidney stone to quantify the energy shielding of the stone caused by cavitation during burst wave lithotripsy (BWL). In the experiment, the bubble clouds are visualized and bubble-scattered acoustics are measured. In the simulation, a compressible, multi-component flow solver is used to capture complex interactions among cavitation bubbles, the stone, and the burst wave. Quantitative agreement is confirmed between results of the experiment and the simulation. In the simulation, a significant shielding of incident wave energy by the bubble clouds is quantified. The magnitude of shielding can reach up to 90% of the energy of the incoming burst wave that otherwise would be transmitted into the stone, suggesting a potential loss of efficacy of stone comminution. There is a strong correlation between the magnitude of the energy shielding and the amplitude of the bubble-scattered acoustics, independent of the initial size and the void fraction of the bubble cloud within a range addressed in the simulation. This correlation could provide for real-time monitoring of cavitation activity in BWL.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper CentralArticle
Maeda, Kazuki0000-0002-5729-6194
Colonius, Tim0000-0003-0326-3909
Alternate Title:Investigation of the energy shielding of kidney stones by cavitation bubble clouds during burst wave lithotripsy
Additional Information:© 2018 Acoustical Society of America. Received 20 August 2018; revised 30 October 2018; accepted 31 October 2018; published online 26 November 2018. K.M. would like to acknowledge the Funai Foundation for Information Technology for the Overseas Scholarship. This work was supported by the National Institutes of Health under Grant No. P01-DK043881 and K01-DK104854. The simulations presented here utilized the Extreme Science and Engineering Discovery Environment, which is supported by the National Science Foundation Grant No. CTS120005.
Funding AgencyGrant Number
Funai FoundationUNSPECIFIED
Subject Keywords:Cloud cavitation, Lithotripsy, Numerical simulation, High-speed imaging, Acoustic imaging
Issue or Number:5
PubMed Central ID:PMC6258362
Record Number:CaltechAUTHORS:20180827-090424631
Persistent URL:
Official Citation:Energy shielding by cavitation bubble clouds in burst wave lithotripsy. Kazuki Maeda, Adam D. Maxwell, Tim Colonius, Wayne Kreider, and Michael R. Bailey. The Journal of the Acoustical Society of America 2018 144:5, 2952-2961. DOI: 10.1121/1.5079641
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:89150
Deposited By: Tony Diaz
Deposited On:27 Aug 2018 16:11
Last Modified:17 Feb 2022 00:14

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