title: Modeling of transient wave propagation in a heterogeneous solid layer coupled with fluid: application to long bones.
abstract: The aim of this work is to evaluate the effects of the heterogeneity and anisotropy of material properties of cortical bone on its ultrasonic response obtained by using axial transmission method. The heterogeneity and anisotropy of material properties are introduced by using a parametric probabilistic model. The geometrical configuration of the tested sample is described by a tri-layer medium composed of a heterogeneous and anisotropic solid layer sandwiched between two acoustic fluid layers of which one of these layers is excited by an acoustic linear source. The numerical results focus on studying of an interest quantity, called velocity of the first arriving signal, showing that it strongly depends on the dispersion induced by statistical fluctuations of stochastic elasticity field.
authors.affiliation: Université Paris-Est, Laboratoire Modélisation et Simulation Multi Echelle, MSME Unité Mixte de Recherche 8208 CNRS, 61 Avenue du Général de Gaulle, 94010 Créteil Cedex, France.
authors.forename: Salah
authors.initials: S
authors.lastname: Naili
authors.affiliation: Université Paris-Est, Laboratoire Modélisation et Simulation Multi Echelle, MSME Unité Mixte de Recherche 8208 CNRS, 61 Avenue du Général de Gaulle, 94010 Créteil Cedex, France.
authors.forename: Vu-Hieu
authors.initials: VH
authors.lastname: Nguyen
authors.affiliation: Université Paris-Est, Laboratoire Modélisation et Simulation Multi Echelle, MSME Unité Mixte de Recherche 8208 CNRS, 61 Avenue du Général de Gaulle, 94010 Créteil Cedex, France.
authors.forename: Mai-Ba
authors.initials: MB
authors.lastname: Vu
authors.affiliation: Université Paris-Est, Laboratoire Modélisation et Simulation Multi Echelle, MSME Unité Mixte de Recherche 8208 CNRS, 5 Boulevard Descartes, 77454 Marne la Vallée, France.
authors.forename: Christophe
authors.initials: C
authors.lastname: Desceliers
authors.affiliation: Université Paris-Est, Laboratoire Modélisation et Simulation Multi Echelle, MSME Unité Mixte de Recherche 8208 CNRS, 5 Boulevard Descartes, 77454 Marne la Vallée, France.
authors.forename: Christian
authors.initials: C
authors.lastname: Soize
mesh_terms: D000818:Animals; D016880:Anisotropy; D001842:Bone and Bones / Q000000981:diagnostic imaging*; D003198:Computer Simulation; D004548:Elasticity; D006801:Humans; D015233:Models, Statistical; D009038:Motion; D009716:Numerical Analysis, Computer-Assisted; D013016:Sound; D013269:Stochastic Processes; D013997:Time Factors; D014465:Ultrasonics / Q000379:methods*; D014463:Ultrasonography