Shear wave viscoelasticity imaging method and system

Abstract

The invention provides a shear wave viscoelasticity imaging method and system. The method includes the steps that a CT value of tissue is obtained; according to a tissue mark, body model CT value and body model density value relation information corresponding to the tissue mark is obtained; a tissue density value corresponding to the CT value of the tissue is determined; shear waves are stimulated inside the tissue, ultrasonic waves are generated in the tissue through an ultrasonic transducer, and an ultrasonic wave return signal is received; according to the ultrasonic wave return signal, a propagation characteristic parameter of the shear waves in the tissue is obtained, and according to the propagation characteristic parameter and the tissue density value, the viscoelasticity parameter of the tissue is obtained; according to the viscoelasticity parameter, a shear wave viscoelasticity image of the tissue is formed. In this way, the effect of viscoelasticity parameter detection is improved, and more reliable references are provided for pathology judgment on the tissue by a doctor according to the shear wave viscoelasticity image of the tissue.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic medical treatment, and in particular relates to a shear wave viscoelastic imaging method and system. Background technique [0002] Shear wave viscoelastic imaging is a technique for measuring and imaging the viscoelastic parameters of tissues through shear wave detection. [0003] According to the elastic modulus E and the shear wave propagation velocity V in the viscoelastic tissue in the prior art s The relationship between the elastic modulus of the viscoelastic tissue: Among them, ρ is the tissue density, and then the elastic information of the viscoelastic tissue is obtained. However, there is a drawback in the prior art: since the tissue density value is not easy to obtain, the prior art sets a fixed density value for the viscoelastic tissue (for example, the density value of the liver is 1010kg / m 3 ), but there are differences in the tissue density of different individuals (such as f...

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Problems solved by technology

[0004] In order to solve at least one of the problems mentioned in the background technology, the present invention provides a shear wave viscoelastic imaging method and system. By obtaining the actual density value of individual tissues, tissue viscoelastic parameters with more accurate measurement results can be obtained, which overcomes the current There are technical defects in obtaining tissue viscoelastic parameters through tissue fixed density values, and the accuracy is not high, so as to improve the effect of viscoelastic parameter detection and provide more reliable pathological judgment for tissues based on tissue shear wave viscoelastic images. reference

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