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2008, 10

M. Malekzadeh Shafaroudi, H. Behnam

Ultrasound field simulation for array transducers based on impulse response calculation

language: English

received 14.09.2007, published 26.04.2008

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ABSTRACT

Array ultrasound transducers have very complicated structures and their field measurements consume a lot of time and cost; therefore using simulation programs is very helpful. In this paper a method for calculation of ultrasound field from continuous wave and pulse excitation for array transducers is presented. The method has been implemented as a simulator software. By defining array-transducer parameters such as elements dimensions, their distances and environment features, this software is capable of calculation of ultrasound pressure field and plotting the results in various methods. A special method (Ring Function) is used that computes field of arcs with the same distance on the transducer from the observation point for calculating of impulse response, and then considering the excitation function, with a simple convolution, pressure field can be calculated. Therefore it prevents repetitive and time-consuming calculation because after impulse response calculation the results can be used for any kind of excitation waveform. Also with some examples, the results of this software were compared with some available software such as Field II and Ultrasim.

Key words: ultrasound, ultrasound transducer, array transducer, ultrasound field, simulation.

13 pages, 12 figures

Сitation: M. Malekzadeh Shafaroudi, H. Behnam. Ultrasound field simulation for array transducers based on impulse response calculation. Electronic Journal “Technical Acoustics”, http://www.ejta.org, 2008, 10.

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Milad Malekzadeh Shafaroudi Milad Malekzadeh Shafaroudi received his B.Sc. degree in Biomedical Engineering in 2003 from Amirkabir University of Technology and his M.Sc. degree in Biomedical Engineering in 2007 from Iran University of Science and Technology, Tehran, Iran. Now he is working at a company named Persia Darman (Producer of Medical Engineering equipments, (http://www.persiadarman.com).

e-mail: milad.malekzadeh(at)gmail.com

 
 

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