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Parker Medical Imaging Research

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January 8, 2019

Shear wave propagation in viscoelastic media: validation of an approximate forward model

A paper co-authored by graduate student Fernando Zvietcovich and Professor Kevin Parker, and collaborators Professor Natalie Baddour (University of Ottawa) and Professor Jannick Rolland (UR Institute of Optics) titled "Shear wave propagation in viscoelastic media: validation of an approximate forward model" has been published by Physics in Medicine and Biology, and can be found here. The work described in the article reconsiders a previous analytical model with the goal of obtaining a computationally straightforward and efficient equation for the propagation of shear waves from a focal push pulse. This model is compared with an experimental OCT system and with finite element models. The results support the use of an efficient form of the Hankel transform for both lossless (elastic) and lossy (viscoelastic) media, and for both impulsive and extended push pulses that can model a range of experimental conditions.