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Distance from bubble wall to 50% reduction in red blood cell viability, r50, induced by bubble expansion as a function of elastic modulus and peak negative pressure for shock-scattering histotripsy (left column) and microtripsy (right column) excitations. (A), (B) 100-kHz fundamental frequency. (C), (D) 1-MHz fundamental frequency. (E), (F), 3-MHz fundamental frequency.
