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Titolo:
USING PHASE INFORMATION IN ULTRASONIC BACKSCATTER FOR IN-VIVO LIVER ANALYSIS
Autore:
MOLTHEN RC; NARAYANAN VM; SHANKAR PM; REID JM; GENIS V; FORSBERG F; HALPERN EJ; 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,INST BIOMED ENGN & SCI 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: 79 - 91
SICI:
0301-5629(1998)24:1<79:UPIIUB>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
NON-RAYLEIGH STATISTICS; TEXTURE; FREQUENCY; SIGNALS; SPECKLE; IMAGES;
Keywords:
TISSUE CHARACTERIZATION; ULTRASONIC IMAGING; HUMAN LIVER; NONUNIFORM PHASE CHARACTERISTICS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
30
Recensione:
Indirizzi per estratti:
Citazione:
R.C. Molthen et al., "USING PHASE INFORMATION IN ULTRASONIC BACKSCATTER FOR IN-VIVO LIVER ANALYSIS", Ultrasound in medicine & biology, 24(1), 1998, pp. 79-91

Abstract

In recent studies, it has been shown that information about scattererspacing tan be obtained from analyzing the phase of the ultrasound echo from various media. Such information proves to be useful when examining the ultrasonic backscatter from well-organized tissue, such as the liver. By quantifying the deviations in scatterer spacing and/or varying degrees of regularity, conclusions may be drawn about the underlying pathology of the tissue. This paper examines the physical basis ofhow the scatterer locations affect the phase of the data. Computer simulations were performed that mimic various scattering conditions and that display the effects of differing degrees of regularity, as well as increases in a diffuse random background scattering component. Results of studies on a phantom are also included to investigate and display the phase response under well-controlled scattering conditions. Finally, in vivo data taken from liver scans were analyzed. In this work, it was shown that the phase of the backscattered signal holds valuableinformation regarding the pathological state of liver tissue. It is suggested that this simple examination of the phase can be refined intoa technique to be used as a method to consistently detect the onset of pathological change. (C) 1998 World Federation for Ultrasound in Medicine & Biology.

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Documento generato il 08/07/20 alle ore 06:52:12