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Titolo:
Enhancement of contrast echocardiography by image variability analysis
Autore:
Fetics, BJ; Wong, EY; Murabayashi, T; Nelson, GS; Cohen, MM; Rochitte, CE; Weiss, JL; Kass, DA; Nevo, E;
Indirizzi:
Johns Hopkins Univ Hosp, Dept Med, Div Cardiol, Baltimore, MD 21287 USA Johns Hopkins Univ Hosp Baltimore MD USA 21287 l, Baltimore, MD 21287 USA Robin Med Inc, Baltimore, MD 21203 USA Robin Med Inc Baltimore MD USA 21203 bin Med Inc, Baltimore, MD 21203 USA Robin Med Inc, Baltimore, MD 21203 USA Robin Med Inc Baltimore MD USA 21203 bin Med Inc, Baltimore, MD 21203 USA Johns Hopkins Med Inst, Dept Biomed Engn, Baltimore, MD 21287 USA Johns Hopkins Med Inst Baltimore MD USA 21287 gn, Baltimore, MD 21287 USA Johns Hopkins Med Inst, Dept Med, Div Cardiol, Baltimore, MD 21287 USA Johns Hopkins Med Inst Baltimore MD USA 21287 ol, Baltimore, MD 21287 USA Johns Hopkins Med Inst, Dept Biomed Engn, Baltimore, MD 21287 USA Johns Hopkins Med Inst Baltimore MD USA 21287 gn, Baltimore, MD 21287 USA
Titolo Testata:
IEEE TRANSACTIONS ON MEDICAL IMAGING
fascicolo: 11, volume: 20, anno: 2001,
pagine: 1123 - 1130
SICI:
0278-0062(200111)20:11<1123:EOCEBI>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
CORONARY-ARTERY DISEASE; III MULTICENTER TRIAL; STRESS-ECHOCARDIOGRAPHY; CLINICAL-APPLICATIONS; IMPLEMENTATION; OPACIFICATION; SPECKLE;
Keywords:
echocardiography; image processing; left ventricle; ultrasound contrast agent;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Engineering, Computing & Technology
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Nevo, E Johns Hopkins Univ Hosp, Dept Med, Div Cardiol, Baltimore, MD 21287 USA Johns Hopkins Univ Hosp Baltimore MD USA 21287 more, MD 21287 USA
Citazione:
B.J. Fetics et al., "Enhancement of contrast echocardiography by image variability analysis", IEEE MED IM, 20(11), 2001, pp. 1123-1130

Abstract

Background: Although there have been recent advances in echocardiography, many studies remain suboptimal due to poor image quality and unclear blood-myocardium border. We developed a novel image processing technique, cardiacvariability imaging (CVI), based on the variance of pixel intensity valuesduring passage of ultrasound microbubble contrast into the left ventricle chamber, with the aim of enhancing endocardial border delineation and imagequality. Methods and Results: CVI analysis was performed on simulated data to test and verify the mechanism of image enhancement. Then CVI analysis was applied to echocardiographic images obtained in two different clinical studies, and still images were interpreted by expert reviewers. In the first study (N= 15), using contrast agent EchoGen, the number of observable wall segments in end-diastolic images, for example, was significantly increased by CVI (4.93) as compared to precontrast (3.28) and contrast images (3.36), P < 0.001 for both comparisons to CVI. In the second study (N = 8), using contrast agent Optison, interobserver variability of manually traced end-diastolicvolumes was significantly decreased using CVI (22.3 ml) as compared to precontrast (63.4) and contrast images (49.0), P < 0.01 for both comparisons to CVI. Conclusion: CVI can substantially enhance endocardial border delineation and improve echocardiographic image quality and image interpretation.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/04/20 alle ore 17:56:44