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Proceedings Paper

Design of ultrasonic transducers with improved lateral resolution for medical imaging
Author(s): Vivek Khanna; Robert X. Gao
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Paper Abstract

Ultrasonic transducers having curved radiating surfaces may offer a simple solution to maintaining good lateral resolution over the large depth of field required in medical imaging. In this paper the design considerations for such a transducer that consists of a cylindrical metal housing and an ultrasonic wave generating piezoceramic disc is presented. The mechanism of focusing the radiated ultrasonic wave is studied by changing the geometry of the front surface of the metal housing. The propagation of ultrasonic wave in the surrounding medium is analyzed using the impulse response approach for the near field region and Fraunhofer's approximation for the far field. In addition, modal analysis of the transducer structure is conducted using the finite element method. The results obtained show that the geometry of the transducer housing has significant effects on the radiation characteristics of the transducer.

Paper Details

Date Published: 10 April 1997
PDF: 10 pages
Proc. SPIE 3037, Medical Imaging 1997: Ultrasonic Transducer Engineering, (10 April 1997); doi: 10.1117/12.271335
Show Author Affiliations
Vivek Khanna, Univ. of Massachusetts/Amherst (United States)
Robert X. Gao, Univ. of Massachusetts/Amherst (United States)

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

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