Endocardium point-to-point insertion dynamic surface reconstruction method for use in cardiac mapping system

A heart mapping and point-by-point insertion technology, which is applied in applications, 3D modeling, and telemetry patient monitoring, can solve the problems of low reconstruction efficiency, inconvenient doctors, and affecting focus point positioning, and achieve the effect of rapid positioning

Active Publication Date: 2018-12-07
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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Problems solved by technology

However, this reconstruction strategy does not conform to the catheter sampling process, the reconstruction efficiency is low, and it is inconvenient for doctors to intuitively feel the local variation range of cardiac reconstruction, which affects the location of the lesion.

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  • Endocardium point-to-point insertion dynamic surface reconstruction method for use in cardiac mapping system

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Embodiment Construction

[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0025] combine figure 1 , the endocardial point-by-point insertion dynamic surface reconstruction method proposed by the present invention comprises the following steps:

[0026] A1: Select four affine independent sampling points to initialize as a tetrahedral grid;

[0027] In the initial stage of cardiac mapping, the doctor first collects four affine independent points through the catheter, and then constructs a Delaunay subdivision structure containing infinite points through these four affine independent points, and combines the four points Initialized as a tetrahedral mesh.

[0028] A2: Ins...

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Abstract

The invention discloses an endocardium point-in-point insertion dynamic surface reconstruction method for use in a cardiac mapping system, comprising: A1: a catheter collects four affine independent points, and is initialized into a tetrahedral mesh by the above four affine independent points; A2: new sampling points are inserted, and a set of surface triangular patches that need to be replaced ina currently reconstructed surface mesh is calculated according to the newly inserted sampling points; A3: a Delaunay triangulation structure is updated, and also the current surface mesh structure isalso updated; A4: the currently reconstructed surface mesh is optimized by using local expansion and engraving; and A5: isolated points already in the Delaunay triangulation structure but not in thesurface mesh are inserted to improve the quality of the surface mesh. The above surface reconstruction method is more suitable for the sampling point step of the catheter in the operation, and is morefriendly to the doctor to grasp the current sampling situation, so as to significantly improve the reconstruction efficiency of the endometrial surface of the cardiac mapping system, and to better improve services of the lesion location and lesion analysis for the doctor.

Description

technical field [0001] The invention relates to the fields of computer graphics and computational geometry, in particular to a point-by-point endocardial insertion dynamic surface reconstruction method used in a cardiac mapping system. Background technique [0002] In recent years, catheter ablation has been clinically proven to be a relatively efficient and safe method to prevent AF recurrence and, in some cases, to cure AF. Therefore, it is of great significance to develop efficient and cheap catheter radiofrequency ablation equipment. [0003] For catheter ablation, the doctor first needs to insert the catheter into the patient's body from the humeral artery, and move it to the aortic valve to enter the ventricle, and then the doctor operates the catheter to start collecting the point cloud on the endocardial surface, and displays it on the display terminal Endocardial surface reconstructed from point cloud. At the same time, based on the reconstructed three-dimensional...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/30G06T5/00G06T5/30A61B5/00
CPCA61B5/0044G06T5/008G06T5/30G06T17/30G06T2207/30048G06T2207/10028
Inventor 吴剑付饶
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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