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Titolo:
COMPARISONS OF THE RAYLEIGH AND K-DISTRIBUTION MODELS USING IN-VIVO BREAST AND LIVER-TISSUE
Autore:
MOLTHEN RC; SHANKAR PM; REID JM; FORSBERG F; HALPERN EJ; PICCOLI CW; GOLDBERG BB;
Indirizzi:
DREXEL UNIV,DEPT ELECT & COMP ENGN,3141 CHESTNUT ST PHILADELPHIA PA 19104 DREXEL UNIV,DEPT ELECT & COMP ENGN PHILADELPHIA PA 19104 DREXEL UNIV,SCH BIOMED ENGN SCI & HLTH SYST PHILADELPHIA PA 19104 THOMAS JEFFERSON UNIV HOSP,DEPT RADIOL PHILADELPHIA PA 19107
Titolo Testata:
Ultrasound in medicine & biology
fascicolo: 1, volume: 24, anno: 1998,
pagine: 93 - 100
SICI:
0301-5629(1998)24:1<93:COTRAK>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
ULTRASONIC B-SCANS; STATISTICS; SIGNALS;
Keywords:
NONRAYLEIGH STATISTICS; K-DISTRIBUTION; ULTRASONIC SCATTERING; TISSUE CHARACTERIZATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
15
Recensione:
Indirizzi per estratti:
Citazione:
R.C. Molthen et al., "COMPARISONS OF THE RAYLEIGH AND K-DISTRIBUTION MODELS USING IN-VIVO BREAST AND LIVER-TISSUE", Ultrasound in medicine & biology, 24(1), 1998, pp. 93-100

Abstract

There is a strong interest in finding out which statistical model is the most appropriate for describing the envelope of the backscattered ultrasonic echoes from different types of tissues, The Rayleigh model is commonly employed, but this requires conditions, such as the presence of large number of randomly located scatterers with fairly uniform cross-sections, that are not always met. However, our research indicates that a model based on the K-distribution may provide a better fit to empirical data over a range of scattering conditions than the standard Rayleigh model, In this study, we looked at the K-distribution as adescriptor of the backscattered envelope of the breast and liver tissues (in vivo), By examining data from various tissue regions, a goodness-of-fit test (a least squares error method) was used to determine whether a Rayleigh or K-distribution model is more appropriate, From a large group of patients and volunteer scans (a total of 72 subjects), the fit between the K-distribution and the data is shown to have a muchsmaller error than the Rayleigh model. (C) 1998 World Federation for Ultrasound in Medicine & Biology.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 12/07/20 alle ore 06:08:20