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Titolo:
ARTIFACTS IN INTRAVASCULAR ULTRASOUND IMAGING - ANALYSES AND IMPLICATIONS
Autore:
FINET G; MAURINCOMME E; TABIB A; CROWLEY RJ; MAGNIN I; RORIZ R; BEAUNE J; AMIEL M;
Indirizzi:
SERV HEMODYNAM F-69394 LYON MONTCHAT FRANCE HOSP CIVILS LYON,HOP CARDIOVASC & PNEUMOL,DEPT HEMODYNAM LYON FRANCE HOSP CIVILS LYON,HOP CARDIOVASC & PNEUMOL,DEPT RADIOL LYON FRANCE CNRS,UNIT 1216 F-69373 LYON FRANCE BOSTON SCI CORP,DIV ULTRASOUND WATERTOWN MA 02172
Titolo Testata:
Ultrasound in medicine & biology
fascicolo: 7, volume: 19, anno: 1993,
pagine: 533 - 547
SICI:
0301-5629(1993)19:7<533:AIIUI->2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
HIGH-FREQUENCY ULTRASOUND; ARTERIAL-WALL; CATHETER; CORONARY; INVITRO; RECONSTRUCTION; BACKSCATTER;
Keywords:
ULTRASOUND; INTRAVASCULAR ULTRASOUND; ECHOCARDIOGRAPHY; ARTIFACTS; IMAGE PROCESSING; IN-VITRO VALIDATION; ULTRASONIC TISSUE EFFECTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
35
Recensione:
Indirizzi per estratti:
Citazione:
G. Finet et al., "ARTIFACTS IN INTRAVASCULAR ULTRASOUND IMAGING - ANALYSES AND IMPLICATIONS", Ultrasound in medicine & biology, 19(7), 1993, pp. 533-547

Abstract

The ability of an intravascular ultrasound catheter to give cross-sectional images of vessel walls and surrounding tissues, and the behavior of ultrasound in heterogeneous media, are at the origin of degradation of image quality. Qualitative and quantitative analyses of in vivo studies are then operator-dependent and are limited by artifacts. We investigated these limitations by an in vitro study on plexiglass phantoms and segments of fresh arteries. We used a 20 MHz transducer mounted on the tip of a 4.8 F catheter and an interventional ultrasound system. The ultrasound beam is reflected onto the rotating transducer at 600 rotations per minute (RPM), creating 360-degrees real-time images (10 images/second). We then observed, analyzed and interpreted the mostspecific reasons for image artifacts: geometric distortions, multipleechoes, the point spread function (PSF) of the imaging system, near-field effects, ''petal-shaped'' effect, and ultrasound speckle. Variouspractical implications have resulted from this study. Only a thoroughknowledge of how to avoid some of the most obvious pitfalls will enable the user to obtain maximum benefits from intravascular ultrasound imaging, and to appreciate its limitations.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 15:15:29