Properties of Acoustical Speckle in the Presence of Phase Aberration Part I: First Order Statistics:
作者： Gregg E. Trahey , Stephen W. Smith
DOI: 10.1177/016173468801000102
关键词: Focal point 、 Function (mathematics) 、 Speckle pattern 、 Measure (mathematics) 、 Second order statistics 、 Mathematics 、 Brightness 、 Optics 、 Speckle noise 、 Phase (waves)
摘要: The first order statistical properties of acoustical speckle patterns are studied as a function several types random and structured phase error. Such errors may arise from tissue velocity inhomogeneities or limitations in the imaging system. In this paper, we review theory describing speckle, describe computer model which predicts mean brightness presence aberrations, report experiments measure effect these aberrations on variance. We find that average is significantly reduced by even mild aberrations. include focal point errors, errors. Good agreement found between experiment simulation. then discuss implications results for through aberrating media, characterization compensation methods.
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