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Proceedings Paper

Diffraction-free ultrasonic transducers for image processing
Author(s): Behrooz Kanani
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Paper Abstract

In many ultrasonic applications, such as ultrasonic imaging and signal processing, it is important that the transmitted pulse shape and ultrasonic beam profile remain consistent throughout the entire radiated field. The principles of diffraction strongly influence the ultrasonic beam profile and pulse shape and causes a considerable fluctuation in the near field region and a significant beam spreading in the far field region. In this work, different voltage distribution such as, logarithmic,linear and Gaussian across the transducer surface was investigated. The effect of a new electrode configuration based on a resistive taper on transducer performance was also discussed. Several transducers have been built to illustrate this design approach with good agreement between theory and experiment.

Paper Details

Date Published: 23 May 2003
PDF: 12 pages
Proc. SPIE 5035, Medical Imaging 2003: Ultrasonic Imaging and Signal Processing, (23 May 2003); doi: 10.1117/12.479882
Show Author Affiliations
Behrooz Kanani, B.K. Pulse Ltd. (United Kingdom)


Published in SPIE Proceedings Vol. 5035:
Medical Imaging 2003: Ultrasonic Imaging and Signal Processing
William F. Walker; Michael F. Insana, Editor(s)

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