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Proceedings Paper

Finite element and experimental study of impedance matching layer optimization
Author(s): Mark R. Draheim; Wenwu Cao
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Paper 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.

Paper Details

Date Published: 10 April 1997
PDF: 5 pages
Proc. SPIE 3037, Medical Imaging 1997: Ultrasonic Transducer Engineering, (10 April 1997); doi: 10.1117/12.271322
Show Author Affiliations
Mark R. Draheim, Whitaker Ctr. for Medical Ultrasonic Transducer Engineering/The Pennsylvania State Univ. (United States)
Wenwu Cao, Whitaker Ctr. for Medical Ultrasonic Transducer Engineering/The Pennsylvania State Univ. (United States)


Published in SPIE Proceedings Vol. 3037:
Medical Imaging 1997: Ultrasonic Transducer Engineering
K. Kirk Shung, Editor(s)

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