Characterization of HIFU transducers designed for sonochemistry application: cavitation distribution and quantification.
Fiche publication
Date publication
février 2010
Auteurs
Membres identifiés du Cancéropôle Est :
Dr BAILLY Yannick
Tous les auteurs :
Hallez L, Touyeras F, Hihn JY, Klima J, Guey JL, Spajer M, Bailly Y
Lien Pubmed
Résumé
Acoustic field distribution was determined in HIFU sonoreactors as well as localization of cavitation activity by crossing different techniques: modeling, hydrophone measurements, laser tomography and SCL measurements. Particular care was taken with quantification of this last technique by pixels or photon counting. Cavitation bubbles generated by HIFU are mainly located on the outer layer of the propagation cone in the post-focal zone. Greatest acoustic activity is not located at the geometrical focal, but corresponds to a high concentration of bubbles zone. On the contrary, the main sonochemical activity shifts slightly toward the transducer, whereas quenching of inertial cavitation is observed directly at the focal. Finally, SCL thresholds have been determined.
Référence
Ultrasonics. 2010 Feb;50(2):310-7