Contribution à l'imagerie ultrasonore quantitative
Abstract
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 .