Topics

Shear Wave Propagation and Estimation of Material Parameters in a Nonlinear, Fibrous Material.

08:00 EDT 1st August 2019 | BioPortfolio

Summary of "Shear Wave Propagation and Estimation of Material Parameters in a Nonlinear, Fibrous Material."

This paper describes the propagation of shear waves in a Holzapfel-Gasser-Ogden (HGO) material and investigates the potential of magnetic resonance elastography (MRE) for estimating parameters of the HGO material model from experimental data. In most MRE studies the behavior of the material is assumed to be governed by linear, isotropic elasticity or viscoelasticity. In contrast, biological tissue is often nonlinear and anisotropic with a fibrous structure. In such materials, application of a quasi-static deformation (pre-deformation) can influence plays an important role in shear wave propagation. Closed form expressions for shear wave speeds in an HGO material with a single family of fibers were found in a reference (undeformed) configuration and after an imposed pre-deformation in simple shear. These analytical expressions show that shear wave speeds are affected by the parameters (µ_0,k_1,k_2,?) of the HGO model and the direction and amplitude of the pre-deformation shear, ?. Simulations of corresponding finite element models confirm the predicted influence of HGO model parameters on speeds of shear waves with specific polarization and propagation directions. Importantly, closed-form expressions for the wave speed in terms of the parameters of the HGO model will allow efficient estimation of material parameters from experimental data.

Affiliation

Journal Details

This article was published in the following journal.

Name: Journal of biomechanical engineering
ISSN: 1528-8951
Pages:

Links

DeepDyve research library

PubMed Articles [12021 Associated PubMed Articles listed on BioPortfolio]

Ultrasound shear wave simulation of wave propagation at oblique angles.

Shear wave elasticity imaging (SWEI) has been used to measure the local tissue elasticity. The local tissue shear modulus can be reconstructed from the displacement field of shear waves using an algeb...

Clutter Filter Wave Imaging.

The elastic properties of human tissue can be evaluated through the study of mechanical wave propagation captured using high-frame rate ultrasound imaging. Methods such as block-matching or phase-base...

Spectral Quantification of Nonlinear Elasticity using Acousto-elasticity and Shear-Wave Dispersion.

Tissue biomechanical properties are known to be sensitive to pathological changes. Accordingly, various techniques have been developed to estimate tissue mechanical properties. Shear-wave elastography...

Piecewise parabolic method for propagation of shear shock waves in relaxing soft solids: One-dimensional case.

Shear shock waves can be generated spontaneously deep within the brain during a traumatic injury. This recently observed behavior could be a primary mechanism for the generation of traumatic brain inj...

Steering the propagation direction of a non-linear acoustic wave in a solid material.

In this research non-collinear wave mixing is used as a non-destructive testing method where the amplitude of the scattering wave contains information on the condition of a material. The practical imp...

Clinical Trials [4453 Associated Clinical Trials listed on BioPortfolio]

Changes in the Ulnar Tissues by Shear-wave Elastography

A single-center, observational, prospective, single cohort study with before-after design. Evaluation by shear-wave elastography, measured in kilopascals (KPa), of the muscle, tendon and c...

The Multi-Center Study of Shear Wave Elastography on Thyroid Nodules

The incidence rates of thyroid cancers have increased in the past decade. Additionally, up to 68% of people have thyroid nodules. Consequently, a precise evaluation of thyroid nodules is v...

Elastography in Boys With Epididymo-orchitis

The patients treated in our clinic for epididymoorchitis will be given scrotal shear wave elastography by the Department of Radiology and affected testis will be compared to non affected t...

Shear Wave Elastography of Prostate Cancer

Evaluation of significant Shear Wave Elastography Parameters for Prostate Biopsy and Prostate Cancer detection.

Assessment of Hepatic Fibrosis by Shear Wave Elastography in Patients With Liver Malignancy: A Prospective Single-center Study

To evaluate the diagnostic performance of two-dimensional shear-wave elastography (SWE) for staging hepatic fibrosis in the background liver parenchyma in patients with liver tumors before...

Medical and Biotech [MESH] Definitions

The internal resistance of a material to moving some parts of it parallel to a fixed plane, in contrast to stretching (TENSILE STRENGTH) or compression (COMPRESSIVE STRENGTH). Ionic crystals are brittle because, when subjected to shear, ions of the same charge are brought next to each other, which causes repulsion.

A principle of estimation in which the estimates of a set of parameters in a statistical model are those quantities minimizing the sum of squared differences between the observed values of a dependent variable and the values predicted by the model.

Rhythmic, intermittent propagation of a fluid through a BLOOD VESSEL or piping system, in contrast to constant, smooth propagation, which produces laminar flow.

Microscopic imaging techniques that utilize nonlinear responses of light-matter interactions which occur with high-intensity illumination, such as from LASERS, and specialized light signal detection instrumentation to produce images without the need for dyes or fluorescent labels.

Computerized compilations of information units (text, sound, graphics, and/or video) interconnected by logical nonlinear linkages that enable users to follow optimal paths through the material and also the systems used to create and display this information. (From Thesaurus of ERIC Descriptors, 1994)

Quick Search


DeepDyve research library

Relevant Topic

Biological Therapy
Biological therapy involves the use of living organisms, substances derived from living organisms, or laboratory-produced versions of such substances to treat disease. Some biological therapies for cancer use vaccines or bacteria to stimulate the body&rs...


Searches Linking to this Article