Quantitative non-linear ultrasonic imaging of targets with significant acoustic impedance contrast--An experimental study

Régine Guillermin 1, * Philippe Lasaygues 1 Guy Rabau 2 Jean-Pierre Lefebvre 1
* Auteur correspondant
1 O&I - Ondes et Imagerie
LMA - Laboratoire de Mécanique et d'Acoustique [Marseille]
2 Sons
LMA - Laboratoire de Mécanique et d'Acoustique [Marseille]
Abstract : This study deals with the reconstruction, from ultrasonic measured data, of the sound speed profile of a penetrable two-dimensional target of arbitrary cross-section embedded in an infinite medium. Green's theorem is used to obtain a domain integral representation of the acoustical scattered field, and a discrete formulation of the inverse problem is obtained using a moment method. An iterative non-linear algorithm minimizing the discrepancy between the measured and computed scattered fields is used to reconstruct the sound speed profile in the region of interest. The minimization process is performed using a conjugated-gradient method. An experimental study with significant acoustical impedance contrast targets immersed in water was performed. Images of the sound speed profile obtained by inversion of experimental data are presented.
Type de document :
Article dans une revue
Journal of the Acoustical Society of America, Acoustical Society of America, 2013, 134 (2), pp.1001-1010. <10.1121/1.4812778>
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https://hal.archives-ouvertes.fr/hal-00850870
Contributeur : Régine Guillermin <>
Soumis le : vendredi 9 août 2013 - 11:54:13
Dernière modification le : mercredi 18 janvier 2017 - 01:02:25

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Régine Guillermin, Philippe Lasaygues, Guy Rabau, Jean-Pierre Lefebvre. Quantitative non-linear ultrasonic imaging of targets with significant acoustic impedance contrast--An experimental study. Journal of the Acoustical Society of America, Acoustical Society of America, 2013, 134 (2), pp.1001-1010. <10.1121/1.4812778>. <hal-00850870>

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