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Titolo:
DESTRUCTION OF CONTRAST MICROBUBBLES DURING ULTRASOUND IMAGING AT CONVENTIONAL POWER OUTPUT
Autore:
VILLARRAGA HR; FOLEY DA; AESCHBACHER BC; KLARICH KW; MULVAGH SL;
Indirizzi:
MAYO CLIN & MAYO FDN,DIV CARDIOVASC DIS,200 1ST ST SW ROCHESTER MN 55905 MAYO CLIN & MAYO FDN,DIV CARDIOVASC DIS ROCHESTER MN 55905 MAYO CLIN & MAYO FDN,DIV CARDIOVASC DIS & INTERNAL MED ROCHESTER MN 55905 UNIV HOSP BERN,INSELSPITAL CH-3010 BERN SWITZERLAND
Titolo Testata:
Journal of the American Society of Echocardiography
fascicolo: 8, volume: 10, anno: 1997,
pagine: 783 - 791
SICI:
0894-7317(1997)10:8<783:DOCMDU>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
SONICATED ALBUMIN; PRESSURE; AGENTS; MODEL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
14
Recensione:
Indirizzi per estratti:
Citazione:
H.R. Villarraga et al., "DESTRUCTION OF CONTRAST MICROBUBBLES DURING ULTRASOUND IMAGING AT CONVENTIONAL POWER OUTPUT", Journal of the American Society of Echocardiography, 10(8), 1997, pp. 783-791

Abstract

Inhomogeneous opacification of cardiac chambers has been frequently observed after intravenous administration of long-persisting echocardiographic contrast agents. We observed this phenomenon to be most pronounced at high acoustic powers with incomplete opacification of the leftventricular apex and left ventricular outflow tract. Reducing the acoustic energy to which the contrast was exposed by decreasing transmit power or intermittently suspending insonification resulted in homogenous opacification of the entire left ventricular cavity. We systematically examined the effect of varying insonification power on the persistence of three investigational ultrasound contrast agents in both in vitro and in vivo models. We found an inverse relationship between the insonifying power and the persistence of the contrast agents. Contrast intensity decay could be reduced either by decreasing exposure to ultrasound by minimizing the transmit power of the system or by intermittently suspending ultrasound generation (triggering). Minimization of ultrasound contrast exposure to ultrasound energy thus improves echocardiographic contrast duration and homogeneity.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/09/20 alle ore 17:05:30