Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Salehabadi, Melika, Nammari, Lara, Luna, Aime, Crutison, Joseph, Klatt, Dieter, Royston, Thomas J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Acoustical Society of America 2023
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
_version_ 1785153162104012800
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
work_keys_str_mv AT salehabadimelika quantifyinguniaxialprestressandwaveguideeffectsondynamicelastographyestimatesforacylindricalrod
AT nammarilara quantifyinguniaxialprestressandwaveguideeffectsondynamicelastographyestimatesforacylindricalrod
AT lunaaime quantifyinguniaxialprestressandwaveguideeffectsondynamicelastographyestimatesforacylindricalrod
AT crutisonjoseph quantifyinguniaxialprestressandwaveguideeffectsondynamicelastographyestimatesforacylindricalrod
AT klattdieter quantifyinguniaxialprestressandwaveguideeffectsondynamicelastographyestimatesforacylindricalrod
AT roystonthomasj quantifyinguniaxialprestressandwaveguideeffectsondynamicelastographyestimatesforacylindricalrod