TY - JOUR
T1 - Differential effects of pre-tension on shear wave propagation in elastic media with different boundary conditions as measured by magnetic resonance elastography and finite element modeling
AU - Chen, Qingshan
AU - Ringleb, Stacie I.
AU - Manduca, Armando
AU - Ehman, Richard L.
AU - An, Kai Nan
N1 - Funding Information:
This study is supported by National Institute of Health (NIH) Grants EB00812 and EB01981. We thank Thomas C. Hulshizer for his technical help.
PY - 2006
Y1 - 2006
N2 - Magnetic resonance elastography (MRE) can non-invasively determine material stiffness based on the propagating shear wavelength. Shear wave propagation in a finite homogenous isotropic material can be affected by multiple factors. In this study we examined the effects of pre-tension and frequency on MRE shear measurements of gel phantoms with different boundary conditions, frequencies, and geometries. Results from MRE measurements were compared to wave motion theory in elastic solids and qualitatively to a finite element (FE) model. Results indicated that boundary conditions, geometry and pre-tension are important factors to be considered when performing MRE tests on a finite material, and that FE modeling can help explore how the shear wave propagation is affected under various boundary conditions and axial stresses, among other potential factors.
AB - Magnetic resonance elastography (MRE) can non-invasively determine material stiffness based on the propagating shear wavelength. Shear wave propagation in a finite homogenous isotropic material can be affected by multiple factors. In this study we examined the effects of pre-tension and frequency on MRE shear measurements of gel phantoms with different boundary conditions, frequencies, and geometries. Results from MRE measurements were compared to wave motion theory in elastic solids and qualitatively to a finite element (FE) model. Results indicated that boundary conditions, geometry and pre-tension are important factors to be considered when performing MRE tests on a finite material, and that FE modeling can help explore how the shear wave propagation is affected under various boundary conditions and axial stresses, among other potential factors.
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U2 - 10.1016/j.jbiomech.2005.04.009
DO - 10.1016/j.jbiomech.2005.04.009
M3 - Article
C2 - 15964007
AN - SCOPUS:33646389559
SN - 0021-9290
VL - 39
SP - 1428
EP - 1434
JO - Journal of Biomechanics
JF - Journal of Biomechanics
IS - 8
ER -