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Proceedings Paper

Propagation and imaging of wideband three-dimensional ultrasound fields
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Paper Abstract

The development of an exact and practicable technique that allows the full time-space complexity of a wideband ultrasound field to be imaged, from a single set of local measurements, is presented. The method is an improvement over the angular spectrum technique, provides a novel approach towards eliminating evanescent waves, and also allows for more efficient computation of transient fields. The new representation of a field has simply propagating components that may be directly measured (via a specifically designed hydrophone) as the time-varying spatial projections of the field. Reconstruction of the transient field is performed by a technique that is a generalization of the Fourier slice theorem. The theory is vindicated by explicit demonstrations with measurements of the fields from typical ultrasound transducers. Visualization of the field is either as a three- dimensional pressure distribution at any temporal instant, or as the time-variation of the pressure over any plane orthogonal to the field propagation direction. This new method for ultrasound field measurement, prediction, and visualization is shown to be eminently practicable and represents a substantial improvement over conventional methods.

Paper Details

Date Published: 24 July 1998
PDF: 9 pages
Proc. SPIE 3336, Medical Imaging 1998: Physics of Medical Imaging, (24 July 1998); doi: 10.1117/12.317010
Show Author Affiliations
Sidney Leeman, King's College Hospital/London (United Kingdom)
Andrew J. Healey, King's College Hospital/London (Norway)

Published in SPIE Proceedings Vol. 3336:
Medical Imaging 1998: Physics of Medical Imaging
James T. Dobbins III; John M. Boone, Editor(s)

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