Contribution à l'imagerie ultrasonore quantitative

Bernard Duchêne (1) , Dominique Lesselier (1) , Walid Tabbara (2)

1 L2S - Laboratoire des signaux et systèmes
2 DRE - Département de Recherche en Electromagnétisme ; EMG - Département Electromagnétisme - L2S

We first present an imaging technique based on the diffraction tomography approach . Experimental results on phantoms will be used to analyse this method at its various stages and illustrate its capabilities. The images is a map of the density of the sources induced in the object by the incident wave. This density is the product of the pressure field in the object by a simple function f (C, a) of the sound speed C and attenuation a in the object . We then present an iterative algorithm that isolate f (C, a) and allows the determination of C and a . This approach will be discussed through results obtained by numerical simulation .

Mots clés: ultrasound; imaging

Domaines: Acoustique [physics.class-ph]; Physique mathématique [math-ph]; Imagerie médicale

Bernard Duchêne, Dominique Lesselier, Walid Tabbara. Contribution à l'imagerie ultrasonore quantitative. Traitement du Signal, 1985, 2 (5 Sp), pp.473-477. ⟨hal-01262849⟩