Wide Band Quantitative Imaging of High Contrast Objects by a Canonical Approximation

Loïc Le Marrec , Chrysoula Tsogka (1) , Philippe Lasaygues (1) , Thierry Scotti (1)

1 LMA - Laboratoire de Mécanique et d'Acoustique [Marseille]

We consider the inverse scattering problem for three dimensional cylindrical objects which are infinite in the axial direction. Our aim being to achieve quantitative ultrasound imaging of high contrast objects, we focus at first on the simplified problem of reconstructing quantitatively the physical parameters (velocity, density) and the shape of a section of the cylinder perpendicular to its axis. We present in this paper a reconstruction method based on an approximation of the geometry by a canonical circular cylinder according to ICBA (Intercepting Canonical Body Approximation)[1] applied in a large frequency range[2]. More precisely, we propose a modification of the ICBA method which takes into account the acquisition protocol and show that the inverse problem can be solved in two steps by reconstructing first the shape of the object and then its physical parameters. Numerical results show the feasibility of this approach.

Domaines: Acoustique [physics.class-ph]; Acoustique [physics.class-ph]

Loïc Le Marrec, Chrysoula Tsogka, Philippe Lasaygues, Thierry Scotti. Wide Band Quantitative Imaging of High Contrast Objects by a Canonical Approximation. WCU, Sep 2003, Paris, France. pp.625-628. ⟨hal-00088888⟩