Pulsed ultrasound field simulation and visualization

Sidney Leeman; Andrew J. Healey; Ricardo G. Dantas; Eduardo Tavares Costa

doi:10.1117/12.382218

12 April 2000 Pulsed ultrasound field simulation and visualization

Sidney Leeman, Andrew J. Healey, Ricardo G. Dantas, Eduardo Tavares Costa

Proceedings Volume 3982, Medical Imaging 2000: Ultrasonic Imaging and Signal Processing; (2000) https://doi.org/10.1117/12.382218
Event: Medical Imaging 2000, 2000, San Diego, CA, United States

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.

Citation Download Citation

Sidney Leeman, Andrew J. Healey, Ricardo G. Dantas, and Eduardo Tavares Costa "Pulsed ultrasound field simulation and visualization", Proc. SPIE 3982, Medical Imaging 2000: Ultrasonic Imaging and Signal Processing, (12 April 2000); https://doi.org/10.1117/12.382218

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