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Proceedings Paper

Pulsed ultrasound field simulation and visualization
Author(s): Sidney Leeman; Andrew J. Healey; Ricardo G. Dantas; Eduardo Tavares Costa
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Paper Abstract

A new method for computing images of transient ultrasound fields from transducers of arbitrary shape is developed. For simplicity, only transducers with axial symmetry are considered here, but the extension to square and rectangular radiators is straightforward. The more general case may be treated by the same methods. The method is based on the use of the directivity spectrum -- which can be shown to be a generalization of the angular spectrum. It is ideally suited, however, for application to transient fields, and the formalism contains no evanescent waves. Images of pulses over extensive ranges from a variety of transducers are shown. In particular, it is shown that the transient field from a strongly-focused bowl transducer may be readily calculated, without the approximations that are necessary when using the traditional Tupholme-Stepanishen method. The simulation method is powerful and computationally efficient. It is considerably faster than methods used up to now, and may be applied to the computation of fields that are problematic for standard methods. The final output shown here is a high-quality 'snapshot' of the field, at various distances from the transducer face. Phase of the field is shown.

Paper Details

Date Published: 12 April 2000
PDF: 7 pages
Proc. SPIE 3982, Medical Imaging 2000: Ultrasonic Imaging and Signal Processing, (12 April 2000); doi: 10.1117/12.382218
Show Author Affiliations
Sidney Leeman, King's College London (United Kingdom)
Andrew J. Healey, Nycomed Imaging AS (Norway)
Ricardo G. Dantas, Univ. Estadual de Campinas (Brazil)
Eduardo Tavares Costa, Univ. Estadual de Campinas (Brazil)


Published in SPIE Proceedings Vol. 3982:
Medical Imaging 2000: Ultrasonic Imaging and Signal Processing
K. Kirk Shung; Michael F. Insana, Editor(s)

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