An elastography method and system

By identifying characteristic directions in ultrasound images, exciting shear waves, and combining longitudinal wave reflection echoes, the problem of inaccurate measurement of the elasticity of non-uniform and anisotropic tissues in existing technologies has been solved, enabling more objective elasticity imaging and assessment.

CN114869329BActive Publication Date: 2025-12-23TSINGHUA UNIVERSITY
2 Cites 0 Cited by

Patent Information

Application Number
CN202210481421.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-05-05
Publication Date
2025-12-23
Estimated Expiration
2042-05-05

AI Technical Summary

Technical Problem

Existing ultrasound elastography techniques struggle to accurately measure elasticity in non-uniform, anisotropic, and complex tissues, especially blood vessels, muscles, and small organs, making it impossible to establish a direct relationship between shear wave velocity and tissue elasticity through simple shear wave velocity.

Method used

By determining the characteristic orientation of the tissue in the ultrasound image, shear waves are excited to propagate along the extension direction of the tissue under test and at a preset angle. Combined with the longitudinal wave reflection echo, the shear wave velocity and dispersion curve are fitted to calculate the tissue elastic characteristics. Imaging is performed using a cross-shaped or two-dimensional array probe.

Benefits of technology

Shear wave elastography was achieved in non-uniform, anisotropic and complex tissue structures, obtaining more objective tissue mechanical parameters, which is suitable for elastic assessment of blood vessels and complex structures.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The application belongs to the technical field of ultrasonic imaging, and relates to an elastic imaging method and system, which comprises the following steps: obtaining a characteristic direction of tissue from an ultrasonic image; respectively exciting shear waves propagating along a direction extending along a to-be-detected tissue and a direction forming a preset angle with the to-be-detected tissue according to the characteristic direction; exciting a longitudinal wave into the to-be-detected tissue through an ultrasonic probe, and generating a reflection echo after the longitudinal wave reaches the tissue; obtaining a shear wave velocity and a shear wave dispersion curve according to the reflection echo; fitting a shear wave velocity and a tissue elasticity equation, and calculating a tissue elasticity characteristic according to the shear wave velocity and the shear wave dispersion curve. The shear wave elastic imaging under the conditions of non-uniformity, anisotropy, complex structure and viscoelasticity can be realized, and more objective tissue mechanical parameters can be obtained.
Need to check novelty before this filing date? Find Prior Art