Modélisation par une méthode pseudospectrale : différences-finies et fabrication de transducteurs ultrasonores pour l'imagerie médicale haute résolution

Content Provider	Semantic Scholar
Author	Filoux, Erwan
Copyright Year	2009
Abstract	High resolution ultrasonic imaging has become an essential tool to assist physicians for various medical diagnoses. This technique relies on the ability of piezoelectric transducers to generate a high frequency (HF) acoustic field into the scanned media. Such transducers are obtained using particular materials and fabrication processes.They are optimized through modeling of their electromechanical behaviour and acoustic radiation pattern, which usually requires the use of several models. A new algorithm has been developped and is presented in this report, which is based on the coupling of pseudospectral and finite-diffrence methods to simulate both the generation and the propagation of acoustic waves in the transducer and the surrounding media, using a single model. This hybrid algorithm has been used to simulate various transducers and the results were accordingly compared to theory and experiments. It has also been used to study the influence of various parameters on the performance of several single-element and array transducer devices.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.applis.univ-tours.fr/theses/2009/erwan.filoux_3049.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article