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In vitro measurements of contrast-to-tissue ratio (CTR) as a result of transmitting noninverted waveforms (peak negative pressure: 1 MPa), inverted waveforms with matched peak negative pressure (1 MPa), and inverted waveforms with matched peak-to-peak pressure (peak-to-peak pressure: 2 MPa). The inverted cosine waveform produced the peak CTR, followed by the non-inverted Gaussian waveform.
