Finite element and experimental study of impedance matching layer optimization

Mark R. Draheim; Wenwu Cao

doi:10.1117/12.271322

10 April 1997 Finite element and experimental study of impedance matching layer optimization

Mark R. Draheim, Wenwu Cao

Proceedings Volume 3037, Medical Imaging 1997: Ultrasonic Transducer Engineering; (1997) https://doi.org/10.1117/12.271322
Event: Medical Imaging 1997, 1997, Newport Beach, CA, United States

Abstract

An important part of ultrasonic transducer design is the optimization of the acoustic impedance matching layer. Since there is a large acoustic impedance mismatch between piezoceramic and human tissue the majority of the acoustic energy from the transducer would be reflected without the use of an intermediate matching layer. This matching layer can improve transducer performance; particularly the transit/receive sensitivity. We report here a study of the optimum matching layer thickens of a transducer using both experimental results and a finite element model. For reliable input parameters we have made a set of 0 - 3 alumina-epoxy composites and measured the material properties. The method used to make the composite is similar to that described by Grewe.

Citation Download Citation

Mark R. Draheim and Wenwu Cao "Finite element and experimental study of impedance matching layer optimization", Proc. SPIE 3037, Medical Imaging 1997: Ultrasonic Transducer Engineering, (10 April 1997); https://doi.org/10.1117/12.271322

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