Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Application of autoregressive methods to multigate spectral analysis
Autore:
Guidi, G; Corti, L; Tortoli, P;
Indirizzi:
Univ Florence, Dept Elect Engn, I-50139 Florence, Italy Univ Florence Florence Italy I-50139 Elect Engn, I-50139 Florence, Italy
Titolo Testata:
ULTRASOUND IN MEDICINE AND BIOLOGY
fascicolo: 4, volume: 26, anno: 2000,
pagine: 585 - 592
SICI:
0301-5629(200005)26:4<585:AOAMTM>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
MAXIMUM DOPPLER FREQUENCY; ULTRASOUND; SIGNAL; MODEL;
Keywords:
ultrasound Doppler; velocity profiles; flow profiles; multigate; specrtral analysis; FFT; autoregressive spectral estimation; Burg's method; spectral variance;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Guidi, G Univ Florence, Dept Elect Engn, Via S Marta 3, I-50139 Florence, Italy Univ Florence Via S Marta 3 Florence Italy I-50139 orence, Italy
Citazione:
G. Guidi et al., "Application of autoregressive methods to multigate spectral analysis", ULTRASOUN M, 26(4), 2000, pp. 585-592

Abstract

Multigate analysis is known to be capable of detecting accurate blood velocity profiles from human vessels. Experimental systems so far presented in the literature use time-domain frequency estimations and, more recently, the fast Fourier transform (FFT) for real-time analysis of Doppler signals from multiple range cells. This experimental study is aimed at evaluating theapplication of an autoregressive (AR) method (Burg algorithm) to multigateDoppler analysis. Both in vitro and in vivo results were collected with a commercial Duplex scanner coupled with a prototype multigate unit developedin our laboratory. The same multigate signals are, thus, processed according to both the FFT and the Burg algorithms. The related spectral and maximum frequency profiles are reported and statistically compared. AR, implemented with the Burg algorithm, is demonstrated to be a way to perform multigate spectral analysis with reduced spectral variance, suitable for maximum velocity profile extraction through a simple threshold. (C) 2000 World Federation for Ultrasound in Medicine & Biology.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/09/20 alle ore 05:54:01