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Quantifying uniaxial prestress and waveguide effects on dynamic elastography estimates for a cylindrical rod
Dynamic elastography attempts to reconstruct quantitative maps of the viscoelastic properties of materials by noninvasively measuring mechanical wave motion in them. The target motion is typically transversely-polarized relative to the wave propagation direction, such as bulk shear wave motion. In a...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Acoustical Society of America
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10693442/ https://www.ncbi.nlm.nih.gov/pubmed/38038614 http://dx.doi.org/10.1121/10.0022581 |
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author | Salehabadi, Melika Nammari, Lara Luna, Aime Crutison, Joseph Klatt, Dieter Royston, Thomas J. |
author_facet | Salehabadi, Melika Nammari, Lara Luna, Aime Crutison, Joseph Klatt, Dieter Royston, Thomas J. |
author_sort | Salehabadi, Melika |
collection | PubMed |
description | Dynamic elastography attempts to reconstruct quantitative maps of the viscoelastic properties of materials by noninvasively measuring mechanical wave motion in them. The target motion is typically transversely-polarized relative to the wave propagation direction, such as bulk shear wave motion. In addition to neglecting waveguide effects caused by small lengths in one dimension or more, many reconstruction strategies also ignore nonzero, non-isotropic static preloads. Significant anisotropic prestress is inherent to the functional role of some biological materials of interest, which also are small in size relative to shear wavelengths in one or more dimensions. A cylindrically shaped polymer structure with isotropic material properties is statically elongated along its axis while its response to circumferentially-, axially-, and radially-polarized vibratory excitation is measured using optical or magnetic resonance elastography. Computational finite element simulations augment and aid in the interpretation of experimental measurements. We examine the interplay between uniaxial prestress and waveguide effects. A coordinate transformation approach previously used to simplify the reconstruction of un-prestressed transversely isotropic material properties based on elastography measurements is adapted with partial success to estimate material viscoelastic properties and prestress conditions without requiring advanced knowledge of either. |
format | Online Article Text |
id | pubmed-10693442 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Acoustical Society of America |
record_format | MEDLINE/PubMed |
spelling | pubmed-106934422023-12-03 Quantifying uniaxial prestress and waveguide effects on dynamic elastography estimates for a cylindrical rod Salehabadi, Melika Nammari, Lara Luna, Aime Crutison, Joseph Klatt, Dieter Royston, Thomas J. J Acoust Soc Am Physical Acoustics Dynamic elastography attempts to reconstruct quantitative maps of the viscoelastic properties of materials by noninvasively measuring mechanical wave motion in them. The target motion is typically transversely-polarized relative to the wave propagation direction, such as bulk shear wave motion. In addition to neglecting waveguide effects caused by small lengths in one dimension or more, many reconstruction strategies also ignore nonzero, non-isotropic static preloads. Significant anisotropic prestress is inherent to the functional role of some biological materials of interest, which also are small in size relative to shear wavelengths in one or more dimensions. A cylindrically shaped polymer structure with isotropic material properties is statically elongated along its axis while its response to circumferentially-, axially-, and radially-polarized vibratory excitation is measured using optical or magnetic resonance elastography. Computational finite element simulations augment and aid in the interpretation of experimental measurements. We examine the interplay between uniaxial prestress and waveguide effects. A coordinate transformation approach previously used to simplify the reconstruction of un-prestressed transversely isotropic material properties based on elastography measurements is adapted with partial success to estimate material viscoelastic properties and prestress conditions without requiring advanced knowledge of either. Acoustical Society of America 2023-12 2023-12-01 /pmc/articles/PMC10693442/ /pubmed/38038614 http://dx.doi.org/10.1121/10.0022581 Text en © 2023 Author(s). https://creativecommons.org/licenses/by/4.0/All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ). |
spellingShingle | Physical Acoustics Salehabadi, Melika Nammari, Lara Luna, Aime Crutison, Joseph Klatt, Dieter Royston, Thomas J. Quantifying uniaxial prestress and waveguide effects on dynamic elastography estimates for a cylindrical rod |
title | Quantifying uniaxial prestress and waveguide effects on dynamic elastography estimates for a cylindrical rod |
title_full | Quantifying uniaxial prestress and waveguide effects on dynamic elastography estimates for a cylindrical rod |
title_fullStr | Quantifying uniaxial prestress and waveguide effects on dynamic elastography estimates for a cylindrical rod |
title_full_unstemmed | Quantifying uniaxial prestress and waveguide effects on dynamic elastography estimates for a cylindrical rod |
title_short | Quantifying uniaxial prestress and waveguide effects on dynamic elastography estimates for a cylindrical rod |
title_sort | quantifying uniaxial prestress and waveguide effects on dynamic elastography estimates for a cylindrical rod |
topic | Physical Acoustics |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10693442/ https://www.ncbi.nlm.nih.gov/pubmed/38038614 http://dx.doi.org/10.1121/10.0022581 |
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