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Conference Papers Year : 2012

Quantitative ultrasonic tomography of high acoustic impedance contrast targets

Régine Guillermin
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Philippe Lasaygues
Guy Rabau
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Abstract

This study is concerned whith the ultrasonic imagery of elastic materials like cylinders or tubes by a diffraction tomography technic. Green's representaton is used to obtain an integral representation of the 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 target area. The minimization process is performed using a conjugated-gradient method. An experimental study with elastic targets immersed in water was performed. Cylindrical targets of various cross-sections have been selected. Inversions of both numerical and experimental data are presented and compared.
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Dates and versions

hal-00811160 , version 1 (23-04-2012)

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  • HAL Id : hal-00811160 , version 1

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Régine Guillermin, Philippe Lasaygues, Guy Rabau. Quantitative ultrasonic tomography of high acoustic impedance contrast targets. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00811160⟩
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