Figure 2
From: A direct comparison of natural and acoustic-radiation-force-induced cardiac mechanical waves
Example of an active SWE acquisition at 4 time points. (a) B-mode at 4 different time points across the cardiac cycle. The white spline in this B-mode represents a M-spline. (b) M-panels for the considered time points depicting the axial tissue velocities as a function of time and space, without band-pass filtering the velocities. (c) Same M-panels as in Fig. 1b, now with a 75–750 Hz band-pass filter applied to the tissue velocities. The white line represents the tracked wave, with its slope corresponding to the wave speed. LV: left ventricle, LA: left atrium, and Ao: aorta.
