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Elastic analysis method of vascular wall based on finite element deformation theory

A technique for elastic analysis, vessel wall, applied in catheters, instruments, display devices, etc., which can solve problems such as difficulty in defining search conditions

Inactive Publication Date: 2011-06-08
BEIJING UNIV OF TECH
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Problems solved by technology

Independent pixels have only grayscale features, and it is difficult to define search conditions when searching for matching points on the template image

Method used

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  • Elastic analysis method of vascular wall based on finite element deformation theory
  • Elastic analysis method of vascular wall based on finite element deformation theory
  • Elastic analysis method of vascular wall based on finite element deformation theory

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Embodiment Construction

[0043] A kind of blood vessel wall elasticity analysis method based on finite element deformation theory of the present invention, it basically lies in the following points:

[0044] According to the statistical analysis of the characteristics of the intravascular ultrasound image, the intima and intima points of the vessel wall are marked. When marking points, it is necessary to select two images of the same position and different pressures in the same cardiac cycle, which are respectively defined as the original image and the template image;

[0045] Use the template matching algorithm to search for the point position on the template image that matches the marked point in the original image;

[0046] A calculation method of triangular strain based on line segment microelement strain is proposed, and the vessel wall is divided into several triangular microelements;

[0047] The calculated results are marked on the original image by color filling to display the vessel wall el...

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Abstract

A method for analyzing the elasticity of vessel walls based on finite element deformation theory belongs to the medical image analysis field. The elasticity of the vessel wall is analyzed by calculating strain characteristic values of the vessel wall in an IVUS image under pressure. An ultrasound transducer hovers in a certain position of a blood vessel lumen for acquiring images of a plurality of cardiac cycles; and the images are input into a computer for processing. The method comprises that: a template matching method is used for searching out matching points of marking points in an original image in a template image; the vessel wall is divided into a plurality of layers according to the organization characters of the vessel wall; a method for calculating the elasticity of the vessel walls based on finite element partition is provided; the vessel walls are divided into a plurality of conjoined triangles according to the characteristics of triangle infinite element strain; with a view to the interaction of the triangles in deformation, factors of influence are also added into the calculation of the strain value. The limitations existing in the existing method for analyzing the elasticity of the vessel walls are changed. The characteristics of pathological changes of the vessel walls are exactly portrayed, thus creating conditions for the analyzing of pathological changes.

Description

technical field [0001] The present invention relates to the field of computerized medical image analysis, in particular to a method for analyzing the elasticity of blood vessel walls based on finite element deformation theory. By processing and analyzing the blood vessel wall in an intravascular ultrasound (IVUS) image, the relative elasticity of the blood vessel wall can be determined. For the analysis and early prediction of vascular wall lesions. Background technique [0002] Intravascular Ultrasound (IVUS) imaging is a new diagnostic method that has been clinically used in the diagnosis of vascular lesions in recent years. Pathological components, such as calcification, fibrous tissue, lipid core and plaque rupture, ex vivo, etc. figure 1 . It is easier to detect early vascular lesions than coronary angiography, which can only provide long-axis images of arteries. At present, IVUS is being more and more widely used to evaluate the characteristics and degree of coronar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B8/12G09F19/00
Inventor 汪友生随晓谛陈建新
Owner BEIJING UNIV OF TECH
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