Journal ArticleDOI
Speckle in ultrasound B-mode scans
TLDR
In this paper, the reduction in speckle that can be obtained with a compound scan with maximum amplitude writing is computed and the condition for the independence of two amplitude values is derived.Abstract:
Ultrasound images obtained with a simple linear or sector scan show a granular appearance, called "speckle." This speckle is analyzed. The reduction in speckle that can be obtained with a compound scan with maximum amplitude writing is computed. The reduction in speckle is almost as large as can be obtained with averaging. It depends on the number of independent amplitude values that are measured. The condition for the independence of two amplitude values is derived, and thus a limit is given for the possible reduction in speckle.read more
Citations
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Journal ArticleDOI
Statistics of Speckle in Ultrasound B-Scans
TL;DR: In this article, the authors derived autocorrelation functions and power spectra derived from B-scans of a scattering phantom containing many scatterers per resolution cell, leading naturally to the definition of the average speckle spot or cell sue, and this inturn is comparable to the resolution cell.
Journal ArticleDOI
Ultrasound image segmentation: a survey
J.A. Noble,Djamal Boukerroui +1 more
TL;DR: This paper reviews ultrasound segmentation methods, in a broad sense, focusing on techniques developed for medical B-mode ultrasound images, and presents a classification of methodology in terms of use of prior information.
Journal ArticleDOI
An adaptive weighted median filter for speckle suppression in medical ultrasonic images
TL;DR: In this article, the adaptive weighted median filter (AWMF) is proposed for reducing speckle noise in medical ultrasonic images. But it is not suitable for image segmentation.
Journal ArticleDOI
Controlled Attenuation Parameter (CAP): A Novel VCTE™ Guided Ultrasonic Attenuation Measurement for the Evaluation of Hepatic Steatosis: Preliminary Study and Validation in a Cohort of Patients with Chronic Liver Disease from Various Causes
Magali Sasso,Michel Beaugrand,Victor de Ledinghen,Catherine Douvin,Patrick Marcellin,Raoul Poupon,Laurent Sandrin,Véronique Miette +7 more
TL;DR: Results show that CAP can efficiently separate several steatosis grades and suggest that CAP is a noninvasive, immediate, objective and efficient method to detect and quantify Steatosis.
Journal ArticleDOI
A least-squares strain estimator for elastography
Faouzi Kallel,Jonathan Ophir +1 more
TL;DR: It is demonstrated that the LSQSE results in an increase of the elastographic sensitivity (smallest strain that could be detected), thereby increasing the strain dynamic range and reducing the strain contrast and spatial resolution.
References
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Statistical properties of laser sparkle patterns
TL;DR: In this article, the first order statistics of the observed electric-field strength, the observed light intensity, and observed light phase are examined, and the autocorrelation functions of the complex field and intensity processes are investigated, and that of the electric field is found to be proportional to the Fourier transform of the light intensity distribution incident on the scattering surface.
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TL;DR: The aim of this book is to clarify the role of noise in the development of linear and nonlinear systems and to provide a procedure forormalising the noise generated by these systems.
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An Introduction to Statistical Communication Theory
TL;DR: This IEEE Classic Reissue provides at an advanced level, a uniquely fundamental exposition of the applications of Statistical Communication Theory to a vast spectrum of important physical problems.
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Laser speckle and related phenomena
TL;DR: Dainty et al. as mentioned in this paper described statistical properties of laser speckle patterns and proposed a method to reduce the number of sparseness of the laser beam in Partially Coherent Light (PCL).
Book ChapterDOI
Statistical Properties of Laser Speckle Patterns
TL;DR: In this article, the first-order statistics of the complex amplitude, intensity and phase of speckle are derived for a free-space propagation geometry and for an imaging geometry.