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Titolo:
IMAGE-ENHANCEMENT BY NONCONTRAST HARMONIC ECHOCARDIOGRAPHY - PART I -QUALITATIVE ASSESSMENT OF ENDOCARDIAL VISUALIZATION
Autore:
MULVAGH SL; FOLEY DA; BELOHLAVEK M; SEWARD JB;
Indirizzi:
MAYO CLIN & MAYO FDN,DIV CARDIOVASC DIS,200 1ST ST SW ROCHESTER MN 55905 MAYO CLIN & MAYO FDN,DIV INTERNAL MED ROCHESTER MN 55905 MAYO CLIN & MAYO FDN,DEPT PHYSIOL & BIOPHYS ROCHESTER MN 55905
Titolo Testata:
Mayo Clinic proceedings
fascicolo: 11, volume: 73, anno: 1998,
pagine: 1062 - 1065
SICI:
0025-6196(1998)73:11<1062:IBNHE->2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
ULTRASOUND; FLOW;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
12
Recensione:
Indirizzi per estratti:
Citazione:
S.L. Mulvagh et al., "IMAGE-ENHANCEMENT BY NONCONTRAST HARMONIC ECHOCARDIOGRAPHY - PART I -QUALITATIVE ASSESSMENT OF ENDOCARDIAL VISUALIZATION", Mayo Clinic proceedings, 73(11), 1998, pp. 1062-1065

Abstract

Objective: To determine whether harmonic imaging-use of signals with frequencies twice that of the transmitted ultrasound to produce ultrasound images-can improve endocardial border definition in patients who have technically difficult echocardiograms, Methods: We studied 29 patients with technically difficult echocardiograms (nonvisualization of 2 or more endocardial segments in a 16-segment model). Apical long-axis, four-chamber, and two-chamber images were acquired during fundamental imaging (at 2.0 and 3.5 MHz) and second harmonic imaging (3,5-MHz receive mode) in random order. Images were digitally stored and subsequently reviewed blindly for endocardial segment score (0 = not visualized; 1 = adequate; or 2 = excellent) and overall ranking of image quality (1 [best] to 3 [worst]). Results: Mean endocardial segment score was significantly better (P<0.0001) for harmonic imaging (1.02 +/- 0.36)than for either fundamental mode (0.49 +/- 0.21 and 0.57 +/- 0.27 forthe 2,0- and 3.5-MHz images, respectively). The harmonic images were ranked as better (P<0.0001) than those of either fundamental mode: harmonic mean rank was 1.07 in comparison with 2.67 and 2.26 for the 2,0-and 3.5-MHz fundamental images, respectively. Conclusion: Noncontrastharmonic imaging appreciably enhances endocardial definition in patients with technically-difficult echocardiographic studies and significantly improves overall image quality.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/09/20 alle ore 17:52:37