Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
ULTRASOUND BACKSCATTERING FROM NON-AGGREGATING AND AGGREGATING ERYTHROCYTES - A REVIEW
Autore:
CLOUTIER G; QIN Z;
Indirizzi:
CLIN RES INST MONTREAL,BIOMED ENGN LAB,110 PINE AVE W MONTREAL PQ H2W1R7 CANADA UNIV MONTREAL,DEPT MED MONTREAL PQ H3C 3J7 CANADA
Titolo Testata:
Biorheology
fascicolo: 6, volume: 34, anno: 1997,
pagine: 443 - 470
SICI:
0006-355X(1997)34:6<443:UBFNAA>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPONTANEOUS ECHO CONTRAST; MITRAL-VALVE DISEASE; RED-CELL AGGREGATION; SPONTANEOUS ECHOCARDIOGRAPHIC CONTRAST; LOW-FREQUENCY SCATTERING; FLOWING WHOLE-BLOOD; SMOKE-LIKE ECHO; SHEAR RATE; DOPPLER ULTRASOUND; PULSATILE FLOW;
Keywords:
ACOUSTIC BACKSCATTERING; BLOOD ECHOGENICITY; SPONTANEOUS ECHO CONTRAST; RED BLOOD CELL AGGREGATION; TURBULENCE; POWER DOPPLER ULTRASOUND;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
98
Recensione:
Indirizzi per estratti:
Citazione:
G. Cloutier e Z. Qin, "ULTRASOUND BACKSCATTERING FROM NON-AGGREGATING AND AGGREGATING ERYTHROCYTES - A REVIEW", Biorheology, 34(6), 1997, pp. 443-470

Abstract

The objective of the present paper is to provide a detailed review oftheoretical, experimental and clinical works aimed at understanding the scattering of ultrasound by red blood cells (RBC). The paper focuses on the role of biofluid mechanics and blood biorheology on the scattering mechanisms. The influence of RBC aggregation on the ultrasound backscattered power is specifically addressed. After a short introduction, the paper presents the theory of Rayleigh scattering and summarizes theoretical models on ultrasound backscattering by RBC. The particle, continuum and hybrid models are presented along with reported packing factors used to consider the orderliness in the spatial arrangement of RBC. Computer models of ultrasound backscattering by RBC are also presented in this section. In the second section, experimental factors affecting the ultrasound backscattered power from blood are presented. The influence of the volume of the scatterers, ultrasound frequency, hematocrit, orientation of the scatterers, flow turbulence, flow pulsatility, and concentration of fibrinogen and dextran is discussed. The third section focuses on the use of ultrasound to characterize RBC aggregation. Three aspects are reported: the shear rate dependence of thebackscattered power, the ''black hole'' phenomenon, and the kinetics of RBC rouleau formation. The fourth section reports in vivo observations of the ''smoke like'' echo in mitral valve disease, and blood echogenicity and backscattered power in veins and arteries. In the last section, new areas of research, clinical applications of ultrasound backscattering, and areas of potential future developments are presented. (C) 1998 Elsevier Science Ltd.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/09/20 alle ore 20:38:33