Extensions of Nonlinear B/A parameter imaging methods for echo mode

F. Varray (1, 2) , Olivier Basset (1) , Piero Tortoli (2) , Christian Cachard (1)

1 Imagerie Ultrasonore
2 UniFI - Università degli Studi di Firenze = University of Florence = Université de Florence

This paper investigates nonlinear B/A parameter imaging in ultrasound echo mode. First, the B/A estimation methods which can be extended to echo mode are identified. The finite amplitude approaches are found to be excellent candidates to assess the nonlinear parameter because of their experimental simplicity, supported by a strong mathematical background. Second, three nonlinear coefficient measurement methods, thus far proposed for applications in homogeneous media, are extended to heterogeneous media. In particular, the simulations show that the extended comparative method (ECM) offers the best results when the probe diffraction effects are taken into consideration. The first experimental images obtained by applying the ECM for two different phantoms are also presented, showing the feasibility of B/A imaging.

Mots clés: nouvelle_equipe_3; imagerie_ultrasonore; Labex CELYA; reseau_international

Domaines: Acoustique [physics.class-ph]; Acoustique [physics.class-ph]

F. Varray, Olivier Basset, Piero Tortoli, Christian Cachard. Extensions of Nonlinear B/A parameter imaging methods for echo mode. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2011, 58 (6), pp.1232-1244. ⟨10.1109/TUFFC.2011.1933⟩. ⟨hal-00718057⟩