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- W2947731034 abstract "As a bubble-based ablative therapy, the efficacy of histotripsy has been demonstrated in healthy or acutely diseased models. Chronic conditions associated with stiff tissues may require additional bubble activity prior to histotripsy liquefaction. In this study, histotripsy pulses were generated in agarose phantoms of Young's moduli ranging from 12.3 to 142 kPa, and in vitro clot models with mild and strong platelet-activated retraction. Bubble cloud emissions were tracked with passive cavitation imaging, and the threshold acoustic power associated with phantom liquefaction was extracted with receiver operator characteristic analysis. The power of histotripsy-generated emissions and the degree of liquefaction were tabulated for both clot models. For the agarose phantoms, the acoustic power associated with liquefaction increased with Young's modulus. When grouped based on agarose concentration, only two arms displayed a significant difference in the liquefaction threshold acoustic power (22.1 kPa versus 142 kPa Young's modulus). The bubble cloud dynamics tracked with passive cavitation imaging indicated no strong changes in the bubble dynamics based on the phantom stiffness. For identical histotripsy exposure, the power of acoustic emissions and degree of clot lysis did not vary based on the clot model. Overall, these results indicate that a fixed threshold acoustic power mapped with passive cavitation imaging can be utilized for predicting histotripsy liquefaction over a wide range of tissue stiffness." @default.
- W2947731034 created "2019-06-07" @default.
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- W2947731034 date "2019-07-18" @default.
- W2947731034 modified "2023-10-14" @default.
- W2947731034 title "<i>In vitro</i>assessment of stiffness-dependent histotripsy bubble cloud activity in gel phantoms and blood clots" @default.
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- W2947731034 doi "https://doi.org/10.1088/1361-6560/ab25a6" @default.
- W2947731034 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6691736" @default.
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