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Proceedings Paper

Attenuation-weighted pulse-echo imaging with ultrasound
Author(s): Sidney Leeman; Andrew J. Healey; Mark C. Betts; Leonard A. Ferrari
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Paper Abstract

Ultrasound pulses utilized for medical imaging and information-gathering appear to be coherently scattered from the many inhomogeneities within a tissue. The consequent interference effects complicate the spectral (Fourier) domain properties of the received signal: this is particularly troublesome when attempting to estimate tissue attenuation from backscattered data. A novel way to describe interference effects in (ultrasound) pulse-echo data is described. Recognition of their influence is achieved via analysis of the temporal phase of the pulse-echo signal, and correction of the artefact is achieved via novel signal processing techniques which rely on adjusting the locations of dominate zeros of the analytic continuation of short corrupted data segments (as pinpointed by the recognition procedure) into the complex frequency domain. Estimation of the mean frequency of a short pulse-echo data segment by the new method gives a reduction in variance by a factor of > 4 over existing Fourier methods. The technique finds application in an imaging technique which incorporates ultrasound attenuation information in conventional B-mode imaging.

Paper Details

Date Published: 8 May 1995
PDF: 8 pages
Proc. SPIE 2432, Medical Imaging 1995: Physics of Medical Imaging, (8 May 1995); doi: 10.1117/12.208338
Show Author Affiliations
Sidney Leeman, King's College London (United Kingdom)
Andrew J. Healey, King's College London (United Kingdom)
Mark C. Betts, King's College London (United Kingdom)
Leonard A. Ferrari, Univ. of California/Irvine (United States)

Published in SPIE Proceedings Vol. 2432:
Medical Imaging 1995: Physics of Medical Imaging
Richard L. Van Metter; Jacob Beutel, Editor(s)

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