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Titolo:
NORMALIZING FRACTIONAL MOVING BLOOD-VOLUME ESTIMATES WITH POWER DOPPLER US - DEFINING A STABLE INTRAVASCULAR POINT WITH THE CUMULATIVE POWER DISTRIBUTION FUNCTION
Autore:
RUBIN JM; BUDE RO; FOWLKES JB; SPRATT RS; CARSON PL; ADLER RS;
Indirizzi:
UNIV MICHIGAN HOSP,DEPT RADIOL,1500 E MED CTR DR ANN ARBOR MI 48109 DIASONICS SANTA CLARA CA 00000
Titolo Testata:
Radiology
fascicolo: 3, volume: 205, anno: 1997,
pagine: 757 - 765
SICI:
0033-8419(1997)205:3<757:NFMBEW>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
COLOR-FLOW; BREAST-TUMORS; SHEAR RATE; WAVE-FORM; QUANTIFICATION; ULTRASOUND; CANCER; ARTERY; ECHOGENICITY; VARIABILITY;
Keywords:
BLOOD, FLOW DYNAMICS; BLOOD VESSELS, US; ULTRASOUND (US), POWER DOPPLER STUDIES; ULTRASOUND (US), TECHNOLOGY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
43
Recensione:
Indirizzi per estratti:
Citazione:
J.M. Rubin et al., "NORMALIZING FRACTIONAL MOVING BLOOD-VOLUME ESTIMATES WITH POWER DOPPLER US - DEFINING A STABLE INTRAVASCULAR POINT WITH THE CUMULATIVE POWER DISTRIBUTION FUNCTION", Radiology, 205(3), 1997, pp. 757-765

Abstract

PURPOSE: To normalize the power Doppler ultrasound (US) signal to theexpected signal from 100% blood in the calculation of a fractional moving blood volume estimate. MATERIALS AND METHODS: To locate the signal from flowing blood with a consistent backscatter coefficient, the authors estimated the knee of the cumulative Doppler power distribution function. They used a now-tube phantom to test the use of this knee tolocate a radial position that would fall into a region of high sheer stress and minimal rouleaux formation. They also studied how well the method normalized fractional moving blood volume estimates of the right renal cortex in a volunteer when simulating different body habitus and in a group of six healthy volunteers to estimate variability. RESULTS: Over five flow velocities and over undersaturated to severely oversaturated receiver gains, the calculated now-tube area was a mean 89% /- 7 (+/- standard deviation) of a standard. In humans, the techniquenormalized the fractional moving blood volume estimates over an 8-dB receiver gain variation; the mean +/- standard deviation of fractionalmoving blood volume estimates for the six volunteers was 37.6% +/- 3.6. CONCLUSION: Vascularity estimates with power Doppler US are feasible with a normalization scheme based on the cumulative Doppler power distribution function.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 12:55:59