Title :
Effects of nonlinearity on propagation through the skull
Author :
Pinton, Gianmarco F. ; Aubry, Jean-Francois ; Tanter, Mickael ; Fink, Mathias
Author_Institution :
Lab. Ondes et Acoust., ESPCI ParisTech, Paris, France
Abstract :
As an ultrasound wave propagates nonlinearly energy is transferred to higher frequencies where it is more strongly attenuated. Compared to soft tissue the skull has a strongly heterogeneous material parameters. We characterize with experiments and establish a numerical method that can describe the effects of the skull on the nonlinear components of ultrasonic wave propagation for application to high intensity focused ultrasound (HIFU) therapy in the brain.
Keywords :
bone; brain; nonlinear acoustics; tumours; ultrasonic propagation; ultrasonic reflection; ultrasonic refraction; ultrasonic scattering; ultrasonic therapy; attenuation; brain; heterogeneous material parameters; high intensity focused ultrasound therapy; nonlinearity effects; numerical method; skull; ultrasound wave propagation; Acoustic propagation; Attenuation; Computed tomography; Finite difference methods; Frequency; Nonlinear acoustics; Nonlinear equations; Skull; UHF propagation; Ultrasonic imaging;
Conference_Titel :
Ultrasonics Symposium (IUS), 2009 IEEE International
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4389-5
Electronic_ISBN :
1948-5719
DOI :
10.1109/ULTSYM.2009.5441636
