Method of noninvasive high-precision vessel wall elastography

An elastography, vascular wall technology, applied in ultrasonic/sonic/infrasound image/data processing, medical science, ultrasonic/sonic/infrasonic Permian technology, etc. Parameters such as longitudinal section of vessel wall

Inactive Publication Date: 2014-09-24
XI AN JIAOTONG UNIV
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Problems solved by technology

These strain parameters can only describe the deformation in a specific direction, and the results cannot accurately describe the elastic properties of the vessel wall under actual noisy conditions
[0006] To sum up, the ultrasound data of B-ultrasound imaging in the longitudinal section of the vessel wall has its advantages in processing, but there is still a lack of effective mechanical parameters to effectively describe the mechanical properties of the longitudinal section of the vessel wall

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  • Method of noninvasive high-precision vessel wall elastography
  • Method of noninvasive high-precision vessel wall elastography
  • Method of noninvasive high-precision vessel wall elastography

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specific Embodiment

[0112] The subjects were supine, and an ultrasound device with a synchronous ECG monitor was used to collect B-mode imaging data of the carotid artery wall in the stable diastolic period. Figure 5 It is an ultrasound image displayed with ECG synchronization.

[0113] Figure 6a1 to Figure 6a2 In order to select two adjacent frames of B-ultrasound carotid artery wall images for off-line data processing and analysis, the optical flow field algorithm is first used to calculate Figure 6a1 The displacement estimation of blood vessels and surrounding tissues in the two frames of images and a2, the displacement field is as follows Figure 6b As shown, the FIR two-dimensional difference filter is used to filter the displacement field. Finally, according to the proposed method, the VonMises strain projection parameters can be obtained and imaged. Figure 6c It is the result of superimposing the Von Mises strain projection parameters on the original B-mode image, which clearly sho...

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Abstract

The invention discloses a method of noninvasive high-precision vessel wall elastography. The method comprises the following steps: acquiring the radio-frequency data or video data of B-mode ultrasonic imaging of a vessel wall longitudinal section; making an off-line analysis on the acquired radio-frequency data or video data to obtain the displacement field of each frame of radio-frequency data or video data; filtering the displacement fields of the radio-frequency data or video data with an FIR two-dimensional difference filter to obtaining strain components on the longitudinal section, including a strain component Epsilonxx in the axial direction of a ultrasonic emission beam, a lateral strain component Epsilonzz and a shearing strain component Epsilonxz; giving a Von Mises strain projection parameter ZetaVM-longiProj and a calculation formula thereof, and imaging the Von Mises strain projection parameter ZetaVM-longiProj to achieve noninvasive high-precision vessel wall elastography. Precise and quantitative vessel wall elastography can be achieved through the method, and the result is superior to those of the conventional other vessel wall strain imaging methods.

Description

【Technical field】 [0001] The invention relates to a method for imaging blood vessel walls, in particular to a method for non-invasive and high-precision elastic imaging of blood vessel walls. 【Background technique】 [0002] Ultrasound elastography of vessel wall has become a hot topic in international research in recent years because of its non-invasiveness. Ultrasonic strain parameter imaging of the vessel wall has mainly gone through three stages of development: 1) the first proposed one-dimensional strain, mainly imaging the axial strain parameters along the direction of the ultrasound beam; Parametric imaging (such as axial strain, transverse strain, and shear strain) describes the strain characteristics of the vessel wall along the direction of the sound beam and perpendicular to the direction of the sound beam; Each component of the strain tensor below (such as radial strain, circumferential strain and shear strain) describes its radial, circumferential and shear defo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B8/08A61B5/0402
Inventor 张红梅阮骊韬张青哲郭佑民万明习单宝文
Owner XI AN JIAOTONG UNIV
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