Fig. 2

(A) Unfiltered wave images at different resolutions (columns) and frequencies (rows). (B) SWS (left) and φ (right) values determined by our processing pipeline plotted against wave displacement SNR. Bessel fits of the unfiltered complex-valued cylinder waves result in ground truths of 0.77 m/s ± 0.09 m/s SWS and 0.30 ± 0.08 rad φ and are shown as dotted red line with SD as a shaded area. Both SWS values as well as φ determined by our pipeline fall within the ground truth for all resolutions. The percent error between the ground truth and the values at 60 × 60 µm2 are 5% for the SWS and 10% for φ. (C) Comparison of tabletop MRE with 7T MRE both analyzed using frequency-resolved Bessel functions and frequency compounded k-MDEV inversion at 60 × 60 µm2. Between 1000 and 1400 Hz, all measurements fall into the same SD range (thickness of the horizontal red line indicates SD). The percent error between the Bessel-based SWS at 7T and the k-MDEV based SWS was 5%, whereas the percent error between the Bessel-based SWS at 0.5T and the k-MDEV measurement was 9%. φ, loss angle; MDEV, multifrequency dual elasto-visco; SWS, shear wave speed