Electronic Journal Technical Acoustics ISSN 1819-2408

Hamid Behnam, Elham Mokhtar Tajvidi

Simulation of acoustic fields from 2D-array transducers with continuous wave excitation in homogeneous medium

language: English

received 29.05.2007, published 09.07.2007

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ABSTRACT

2D-Array transducers are used in real-time 3D ultrasound imaging. Appropriate design of the received and emitted beam pattern from 2D-Array transducers is the aim of simulation of the beam pattern. In most methods of the simulation of acoustic fields, the far-field approximation was applied in order to increase the speed of the calculation. In this paper a new method that without applying any approximation converts the two dimensional Rayleigh integral over the transducer surface to one dimensional integral expression is used. It has shown proper speed and good accuracy both in near-field and in far-field. So it will be useful in intravascular sonography or low depth imaging, where the desired tissue is very near to the transducer. Also it can be used for optimizing array parameters in designing stage and also for education and research purposes. Simulation results are shown for different parameter settings to evaluate the effects of every parameter on the field of 2-D arrays.

Keywords: ultrasound, ultrasound transducers, ultrasound imaging, simulation

11 pages, 8 figures

Сitation: Hamid Behnam, Elham Mokhtar Tajvidi. Simulation of acoustic fields from 2D-array transducers with continuous wave excitation in homogeneous medium. Electronic Journal “Technical Acoustics”, http://www.ejta.org, 2007, 14.

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		Hamid Behnam received his B.Sc. degree in Electrical Engineering in 1987 from Iran University of Science and Technology and his M.Sc. degree in Biomedical Engineering in 1993 from Sharif University of Technology, Tehran, Iran. He received his Ph.D. in applied Electronics in 1998 from Tokyo Institute of Technology, Tokyo, Japan. Currently, he is an Assistant Professor in electrical engineering department of Iran University of Science and Technology. His research interests include: Ultrasound in Medicine, Biomedical Signal and Image processing. e-mail: behnam(at)iust.ac.ir
		Elham Mokhtar Tajvidi received her B.Sc. degree in Biomedical Engineering in 1998 from Islamic Azad University and her M.Sc. degree in Biomedical Engineering in 2003 from Islamic Azad University, Science and Research Branch, Tehran, Iran. Now she is working at Janbazan Medical and Engineering Research Center (http://www.jmerc.ac.ir) and Parsakara company (http://www.parsakara.com).