The main aim of the work in this thesis is to exploit nonlinear tissues properties for improving
in medical ultrasound image quality. Ultrasound imaging techniques have been widely used …

The propagation of acoustic waves is a fundamentally non-linear process, and only waves
with infinitesimally small amplitudes may be described by linear expressions. In practice, all …

Nonlinear propagation of sound has been exploited in the last 15 years in medical
ultrasound imaging through tissue harmonic imaging (THI). THI creates an image by filtering …

Abstract Tissue Harmonic Imaging (THI) is an imaging modality that is currently deployed on
diagnostic ultrasound scanners. In THI the amplitude of the ultrasonic pulse that is used to …

Résumé Les agents de contraste sont de petites bulles qui répondent non linéairement
lorsqu'ils sont exposés à ultrasons. La réponse non-linéaire donne la possibilité d'images …

Résumé L'imagerie ultrasonore harmonique a d'abord été développé pour suivre les agents
de contraste formés de microbulles dans les années 90, en faisant l'hypothèse que la …

Tissue harmonic imaging is a new ultrasound imaging technique which uses the harmonic
components generated by non-linear acoustic propagation through human tissues to form …

Theory and simulations are presented indicating that imaging at the second-harmonic
frequency does not solve the problem of ultrasonic wave aberration. The non-linearity of …

Finite amplitude sound propagating in a medium undergoes distortion due to the nonlinear
properties of the medium. The nonlinear distortion produces harmonic (and subharmonic) …