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Ultrasonic Methods for Measurement of Small Motion and Deformation of Biological Tissues for Assessment of Viscoelasticity

Ultrasonic Methods for Measurement of Small Motion and Deformation of Biological Tissues for Assessment of Viscoelasticity

By Hideyuki Hasegawa, Hiroshi Kanai

In this monograph, an accurate ultrasonic method for measurement of small motion and deformation of biological tissue is described. In the displacement estimation based on the phase change of echoes, the displacement estimates are biased when the center frequency of the RF echo changes. Such an apparent change in the center frequency could be caused by the interference of echoes from scatterers. To reduce the influence of the center frequency variation on the estimation of motion and deformation,
an error correcting function, which does not require the assumption that the center frequency distributions in 2 different frames are the same, was introduced. As a result, the proposed method provides better strain estimates in comparison with conventional phase-sensitive correlation methods.
This monograph also shows examples of applications of this method to measurement of small motion and deformation of biological tissues. This method can be applied to measurement of elasticity of dynamic tissues,
such as the artery. Also, elastic properties of static tissues can be also measured by combining with actuation using the acoustic radiation force.

Product Details

  • Ultrasonic Methods for Measurement of Small Motion and Deformation of Biological Tissues for Assessment of Viscoelasticity
  • ISBN-13: 9780791860311
  • Publisher: Momentum Press, LLC
  • Publication date: 5/1/2014
  • Pages: 56

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Table of Contents
Series Editors’ Preface iii
Abstract vii
I. Introduction 1
II. Principles 5
II-A Measurement of small motion and deformation of tissues
by ultrasound 5
II-B Non-invasive vascular elastography: An application of
measurement of small motion and deformation 14
II-C Actuation of tissue using acoustic radiation force for
measurement of mechanical properties 15
II-D Experimental setup 17
III. Experimental results 20
III-A Evaluation of accuracy of the ultrasonic motion estimator
and method for estimation of arterial wall elasticity 20
III-B Measurement of elasticity of the arterial wall 23
III-C Measurement of small motion of an object induced by
acoustic radiation force 26

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