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MR imaging of a blood clot during sonolysis (bifrequency excitation, P ac = 40 W) before (a), during (b), and after (c and d) the complete drilling of the sample. (a, b, and c) Acquisitions are performed in coronal plane aligned with the acoustical axis while (d) corresponds to a through-focus axial plane (orthogonal to the acoustical axis). The hypointense bands correspond to MR signal saturation at interleaved slice crossing.
