DocumentCode :
2763018
Title :
Multi-frequency narrowband tissue characterization
Author :
Linssen, F.M.J. ; Hoeks, A.P.G.
Author_Institution :
Dept. of Biophys., Limburg Univ., Maastricht, Netherlands
fYear :
1990
fDate :
4-7 Dec 1990
Firstpage :
1363
Abstract :
Characterization of the tissue of a thin layer (e.g. an artery wall) can be achieved by comparison of the spectra of the reflections from the boundaries of the tissue layer. To avoid problems that arise from the use of short (broadband) pulses, the method proposed uses long and almost monochromatic pulses. The frequency dependence of the acoustic parameters can be obtained by using different central emission frequencies. A deconvolution algorithm is used to separate overlapping reflections from closely spaced tissue interfaces. A Wiener-inverse filter allows adequate recovery of the temporal resolution, and a deconvolution algorithm based on l1 deconvolution gives accurate estimates of the reflectivity values, even under noisy conditions
Keywords :
biomedical ultrasonics; ultrasonic reflection; Wiener-inverse filter; acoustic parameters; artery wall; central emission frequencies; deconvolution algorithm; multi-frequency narrowband tissue characterization; overlapping reflections; temporal resolution; Acoustic pulses; Acoustic reflection; Convolution; Deconvolution; Frequency domain analysis; Narrowband; Reflectivity; Shape; Ultrasonic transducers; Wiener filter;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Ultrasonics Symposium, 1990. Proceedings., IEEE 1990
Conference_Location :
Honolulu, HI
Type :
conf
DOI :
10.1109/ULTSYM.1990.171588
Filename :
171588
Link To Document :
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