Impact of Acoustic Radiation Force Excitation Geometry on Shear Wave Dispersion and Attenuation Estimates

Shear wave elasticity imaging (SWEI) characterizes the mechanical properties of human tissues to differentiate healthy from diseased tissue. Commercial scanners tend to reconstruct shear wave speeds for a region of interest using time-of-flight methods reporting a single shear wave speed (or elastic modulus) to the end user under the assumptions that tissue is elastic and shear wave speeds are not dependent on the frequency content of the shear waves. Human tissues, however, are known to be viscoelastic, resulting in dispersion and attenuation.

Source: Ultrasound in Medicine and Biology - February 5, 2018 Category: Radiology Authors: Samantha L. Lipman, Ned C. Rouze, Mark L. Palmeri, Kathryn R. Nightingale Tags: Original Contribution Source Type: research