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A Fast Speckle Tracking Method for 3D Echocardiography with Sub-pixel Accuracy

An echocardiography, sub-pixel technology, applied in the field of medical ultrasound image processing, can solve the problems of difficult myocardial tissue movement tracking, demanding image quality, poor clinical practicability, etc., achieve good adaptive characteristics and robustness, and avoid propagation with cumulative effect

Active Publication Date: 2022-02-11
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The optical flow based speckle tracking method (Optical flow based speckletracking) can achieve high-precision myocardial tissue motion tracking, but it has strict requirements on image quality and poor clinical practicability
The block matching based speckle tracking method (Block matching based speckle tracking) has good clinical practicability and is the mainstream method in the field of 3D STE imaging technology, but the traditional block matching method is difficult to achieve high-precision myocardial tissue motion tracking
In addition, the computational processing efficiency and clinical application performance of previous methods such as adaptive characteristics and robustness are generally not good.

Method used

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  • A Fast Speckle Tracking Method for 3D Echocardiography with Sub-pixel Accuracy
  • A Fast Speckle Tracking Method for 3D Echocardiography with Sub-pixel Accuracy
  • A Fast Speckle Tracking Method for 3D Echocardiography with Sub-pixel Accuracy

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Experimental program
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Effect test

Embodiment 1

[0051] A method for 3D echocardiography speckle tracking. In this embodiment, the ultrasound examination room of the Cardiology Department of a certain hospital is equipped with a domestic cardiac ultrasound diagnostic instrument and a computer workstation. The main function of the workstation is to realize the 3D STE imaging technology based on the method of the invention. That is, the method of the present invention is used to perform speckle tracking on 3D echocardiographic image data, to realize the velocity vector imaging, strain and strain rate imaging of myocardial tissue, and the measurement and analysis of motion parameters such as left ventricular torsional angular displacement, torsional moment, and torsional angular velocity. Imaging, etc. The clinician transfers the 3D echocardiographic image data collected by the ultrasonic diagnostic instrument to the workstation through a mobile storage medium such as a U disk, and assumes that the 3D echocardiographic sequence...

Embodiment 2

[0067] According to the method of a kind of 3D echocardiography speckle tracking described in embodiment 1, its difference is:

[0068] For reference block R j The pixel value is calibrated, as shown in formula (I):

[0069]

[0070] In formula (I), 02 ·(j-3) 2 , q=1-m-p.

Embodiment 3

[0072] According to the method of a kind of 3D echocardiography speckle tracking described in embodiment 1, its difference is:

[0073] by As a reference block, perform block matching calculation with 1 / 16 sub-pixel precision, the implementation process is as follows:

[0074] S41) in I j up to r j-2 (x j-2 ,y j-2 ,z j-2 ) point as the center of the search area to perform the first cubic spline interpolation, so that three equally spaced interior points between two adjacent nodes are interpolated to obtain a search area S11 with 1 / 4 sub-pixel precision;

[0075] S42) Use the full search algorithm and the SAD (Sum of absolute differences) matching criterion, and use the SAD iterative calculation early termination strategy, perform a match in the search area S11, record the point corresponding to the minimum SAD value as a 1 / 4 sub-pixel accuracy Tracking point R11;

[0076] S43) Take the primary 1 / 4 sub-pixel precision tracking point R11 as the center point, and perform ...

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Abstract

The present invention relates to a fast three-dimensional echocardiography speckle tracking method with sub-pixel precision, comprising: selecting tracking points by an operator, and setting initial parameters such as block size and search area size; After calibration with the pixel value of the reference block, block matching tracking with 1 / 16 sub-pixel precision is performed; the coordinates of even-numbered frame tracking points are obtained through spline interpolation calculation, and the myocardial tissue region of interest is automatically marked by the computer on the 3D echocardiography sequence images. The invention realizes a high-precision fast 3D echocardiogram speckle tracking method, and the method has good self-adaptive characteristics and robustness. The method of the invention is applicable to the 3D STE imaging technology aiming at realizing the accurate evaluation of cardiac function and quantitative diagnosis and treatment. The 2D variant of the method of the present invention is a fast 2D echocardiographic speckle tracking method with sub-pixel accuracy.

Description

technical field [0001] The invention relates to a three-dimensional (3D) echocardiogram speckle tracking method, in particular to a fast 3D echocardiogram speckle tracking method with sub-pixel precision, belonging to the technical field of medical ultrasonic image processing, and aims to realize accurate evaluation of cardiac function 3D STE imaging technology (3D Speckle Tracking Echocardiography) for quantitative diagnosis and treatment. Background technique [0002] Heart failure is the final stage in the development of cardiovascular diseases such as coronary heart disease, hypertension, congenital heart disease, valvular heart disease, and cardiomyopathy. The greatest challenge facing the cardiovascular community in the 21st century. For high-risk groups prone to heart failure, early quantitative evaluation of cardiac function, early identification of cardiac systolic and diastolic dysfunction and effective intervention are conducive to preventing and delaying the occ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B8/08A61B8/00
CPCA61B8/0883A61B8/483A61B8/52
Inventor 孙丰荣周晓彤刘莹莹边栋邢跃林
Owner SHANDONG UNIV