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- W2897919993 abstract "Modeling and numerical simulation of bubble clouds induced by intense ultrasound waves are conducted to quantify the effect of cloud cavitation on burst wave lithotripsy, a proposed non-invasive alternative to shock wave lithotripsy that uses pulses of ultrasound with an amplitude of O(1) MPa and a frequency of O(100) kHz. A unidirectional acoustic source model and an Eulerian-Lagrangian method are developed for simulation of ultrasound generation from a multi-element array transducer and cavitation bubbles, respectively. Parametric simulations of the spherical bubble cloud dynamics reveal a new scaling parameter that dictates both the structure of the bubble cloud and the amplitude of the far-field, bubble-scattered acoustics. The simulation further shows that a thin layer of bubble clouds nucleated near a kidney stone model can shield up to 90% of the incoming wave energy, indicating a potential loss of efficacy during the treatment due to cavitation. Strong correlations are identified between the far-field, bubble-scattered acoustics and the magnitude of the shielding, which could be used for ultrasound monitoring of cavitation during treatments. The simulations are validated by companion experiments in vitro. [The work was supported by NIH P01-DK043881 and K01-DK104854.]" @default.
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- W2897919993 date "2018-09-01" @default.
- W2897919993 modified "2023-09-25" @default.
- W2897919993 title "Modeling and numerical simulation of the bubble cloud dynamics in an ultrasound field for burst wave lithotripsy" @default.
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- W2897919993 doi "https://doi.org/10.1121/1.5067866" @default.
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