title: Imaging of shear waves induced by Lorentz force in soft tissues.
abstract: This study presents the first observation of elastic shear waves generated in soft solids using a dynamic electromagnetic field. The first and second experiments of this study showed that Lorentz force can induce a displacement in a soft phantom and that this displacement was detectable by an ultrasound scanner using speckle-tracking algorithms. For a 100 mT magnetic field and a 10 ms, 100 mA peak-to-peak electrical burst, the displacement reached a magnitude of 1 μm. In the third experiment, we showed that Lorentz force can induce shear waves in a phantom. A physical model using electromagnetic and elasticity equations was proposed. Computer simulations were in good agreement with experimental results. The shear waves induced by Lorentz force were used in the last experiment to estimate the elasticity of a swine liver sample.
authors.affiliation: Inserm, U1032, LabTau, Lyon F-69003, France and Université de Lyon, Lyon F-69003, France.
authors.forename: P
authors.initials: P
authors.lastname: Grasland-Mongrain
authors.affiliation: Inserm, U1032, LabTau, Lyon F-69003, France and Université de Lyon, Lyon F-69003, France.
authors.forename: R
authors.initials: R
authors.lastname: Souchon
authors.affiliation: Inserm, U1032, LabTau, Lyon F-69003, France and Université de Lyon, Lyon F-69003, France.
authors.forename: F
authors.initials: F
authors.lastname: Cartellier
authors.affiliation: Inserm, U1032, LabTau, Lyon F-69003, France and Université de Lyon, Lyon F-69003, France.
authors.forename: A
authors.initials: A
authors.lastname: Zorgani
authors.affiliation: Inserm, U1032, LabTau, Lyon F-69003, France and Université de Lyon, Lyon F-69003, France.
authors.forename: J Y
authors.initials: JY
authors.lastname: Chapelon
authors.affiliation: Inserm, U1032, LabTau, Lyon F-69003, France and Université de Lyon, Lyon F-69003, France.
authors.forename: C
authors.initials: C
authors.lastname: Lafon
authors.affiliation: Inserm, U1032, LabTau, Lyon F-69003, France and Université de Lyon, Lyon F-69003, France.
authors.forename: S
authors.initials: S
authors.lastname: Catheline
mesh_terms: D000818:Animals; D003198:Computer Simulation; D004548:Elasticity; D008099:Liver / Q000737:chemistry; D060526:Magnetic Fields; D008962:Models, Theoretical; D019047:Phantoms, Imaging; D033081:Shear Strength; D013552:Swine; D014465:Ultrasonics / Q000295:instrumentation / Q000379:methods*