Title :
Acoustic tomography with refraction: a comparison of algorithms
Author :
Denis, F. ; Gimenez, G. ; Basset, O.
Author_Institution :
Lab. de Traitement du Signal et Ultrasons, CNRS, Inst. Nat. des Sci. Appliquees, Villeurbanne, France
Abstract :
Different reconstruction techniques for acoustic tomography with refraction were implemented and compared using simulated data, with stability and precision criteria. One of these algorithms, involving curved-ray reconstruction, exhibits a better behavior for refracting media and it provides a good improvement over the classical straight-ray images for objects of simple geometry even when the refractive index variation reaches 8-10%
Keywords :
acoustic imaging; biomedical ultrasonics; computerised tomography; ultrasonic refraction; US tomography; acoustic tomography; agar gel phantoms; algorithms; curved-ray reconstruction; reconstruction techniques; refraction; refractive index variation; Acoustic refraction; Convergence; Image reconstruction; Iterative algorithms; Linearity; Ray tracing; Reconstruction algorithms; Refractive index; Subspace constraints; Tomography;
Conference_Titel :
Ultrasonics Symposium, 1990. Proceedings., IEEE 1990
Conference_Location :
Honolulu, HI
DOI :
10.1109/ULTSYM.1990.171480
