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A representative example of the spectral power in the ultraharmonic band over the treatment duration; a) with Definity® infusion but no cavitation (0.12 MPa peak-to-peak), b) with Definity® infusion but no cavitation (0.21 MPa peak-to-peak), c) with infusion of PBS alone at a peak-to-peak pressure of 0.32 MPa (note only initial cavitation activity is observed) and d) with infusion of Definity® resulting in relatively sustained cavitation at the same peak-to-peak pressure (0.32 MPa).
