Figure 2 | Scientific Reports

Figure 2

From: Multichannel resonant acoustic rheometry system for quantification of coagulation of multiple human plasma samples

Figure 2

Characterization of the ultrasound field of the mRAR system using a fiber optic hydrophone. (a) A typical example of a 2-cyle pulse (for imaging and detection) generated by one of the transducers. The output across the 4 elements had averaged pressure amplitude of 3.4 ± 0.8 MPa. (b, c) The acoustic pressure field maps of the transverse focal plane and axial distribution measured using a 2-cycle pulse with a 0.1 mm step size, with the averaged full width half maximum (FWHM) of 1.02 ± 0.07 mm in the X direction, 1.02 ± 0.06 mm in the Y direction, and 12.41 ± 4.11 mm in the Z direction respectively. (d, e) Example of tone bursts with 20 cycles or 100 cycles respectively used for excitation of surface perturbation in the sample in RAR. The averaged pressure amplitude for 20-cycle pulses was 4.6 ± 1.1 MPa.

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