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Article Dans Une Revue Journal of the Acoustical Society of America Année : 2013

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

Régine Guillermin
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Philippe Lasaygues
Guy Rabau
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Jean-Pierre Lefebvre
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Résumé

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.
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Dates et versions

hal-00850870 , version 1 (09-08-2013)

Identifiants

Citer

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, 2013, 134 (2), pp.1001-1010. ⟨10.1121/1.4812778⟩. ⟨hal-00850870⟩
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