Lorentz force induced shear waves for magnetic resonance elastography applications

Abstract Quantitative mechanical properties of biological tissues can be mapped using the shear wave elastography technique. This technology has demonstrated a great potential in various organs but shows a limit due to wave attenuation in biological tissues. An option to overcome the inherent loss i...

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Autores principales:	Guillaume Flé, Guillaume Gilbert, Pol Grasland-Mongrain, Guy Cloutier
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/492b14eef4e5482d93060c51c1a4a030
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spelling	oai:doaj.org-article:492b14eef4e5482d93060c51c1a4a0302021-12-02T16:04:22ZLorentz force induced shear waves for magnetic resonance elastography applications10.1038/s41598-021-91895-92045-2322https://doaj.org/article/492b14eef4e5482d93060c51c1a4a0302021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-91895-9https://doaj.org/toc/2045-2322Abstract Quantitative mechanical properties of biological tissues can be mapped using the shear wave elastography technique. This technology has demonstrated a great potential in various organs but shows a limit due to wave attenuation in biological tissues. An option to overcome the inherent loss in shear wave magnitude along the propagation pathway may be to stimulate tissues closer to regions of interest using alternative motion generation techniques. The present study investigated the feasibility of generating shear waves by applying a Lorentz force directly to tissue mimicking samples for magnetic resonance elastography applications. This was done by combining an electrical current with the strong magnetic field of a clinical MRI scanner. The Local Frequency Estimation method was used to assess the real value of the shear modulus of tested phantoms from Lorentz force induced motion. Finite elements modeling of reported experiments showed a consistent behavior but featured wavelengths larger than measured ones. Results suggest the feasibility of a magnetic resonance elastography technique based on the Lorentz force to produce an shear wave source.Guillaume FléGuillaume GilbertPol Grasland-MongrainGuy CloutierNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Guillaume Flé Guillaume Gilbert Pol Grasland-Mongrain Guy Cloutier Lorentz force induced shear waves for magnetic resonance elastography applications
description	Abstract Quantitative mechanical properties of biological tissues can be mapped using the shear wave elastography technique. This technology has demonstrated a great potential in various organs but shows a limit due to wave attenuation in biological tissues. An option to overcome the inherent loss in shear wave magnitude along the propagation pathway may be to stimulate tissues closer to regions of interest using alternative motion generation techniques. The present study investigated the feasibility of generating shear waves by applying a Lorentz force directly to tissue mimicking samples for magnetic resonance elastography applications. This was done by combining an electrical current with the strong magnetic field of a clinical MRI scanner. The Local Frequency Estimation method was used to assess the real value of the shear modulus of tested phantoms from Lorentz force induced motion. Finite elements modeling of reported experiments showed a consistent behavior but featured wavelengths larger than measured ones. Results suggest the feasibility of a magnetic resonance elastography technique based on the Lorentz force to produce an shear wave source.
format	article
author	Guillaume Flé Guillaume Gilbert Pol Grasland-Mongrain Guy Cloutier
author_facet	Guillaume Flé Guillaume Gilbert Pol Grasland-Mongrain Guy Cloutier
author_sort	Guillaume Flé
title	Lorentz force induced shear waves for magnetic resonance elastography applications
title_short	Lorentz force induced shear waves for magnetic resonance elastography applications
title_full	Lorentz force induced shear waves for magnetic resonance elastography applications
title_fullStr	Lorentz force induced shear waves for magnetic resonance elastography applications
title_full_unstemmed	Lorentz force induced shear waves for magnetic resonance elastography applications
title_sort	lorentz force induced shear waves for magnetic resonance elastography applications
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/492b14eef4e5482d93060c51c1a4a030
work_keys_str_mv	AT guillaumefle lorentzforceinducedshearwavesformagneticresonanceelastographyapplications AT guillaumegilbert lorentzforceinducedshearwavesformagneticresonanceelastographyapplications AT polgraslandmongrain lorentzforceinducedshearwavesformagneticresonanceelastographyapplications AT guycloutier lorentzforceinducedshearwavesformagneticresonanceelastographyapplications
_version_	1718385204138082304

Lorentz force induced shear waves for magnetic resonance elastography applications

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