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Three-dimensional heart magnetic source positioning method, system and server

A positioning method and positioning system technology, applied in the field of biomedical signal analysis, can solve problems such as low algorithm efficiency, many algorithm iterations, and large positioning errors, and achieve the effect of reducing positioning errors, reducing iterations, and improving algorithm efficiency

Inactive Publication Date: 2017-06-30
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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Problems solved by technology

[0006] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a three-dimensional magnetocardiographic source location method, system and server based on full tensor magnetocardiogram data, which is used to solve the problem of algorithm iteration in the center magnetic source location algorithm of the prior art. Many times, low algorithm efficiency, and large positioning errors

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  • Three-dimensional heart magnetic source positioning method, system and server
  • Three-dimensional heart magnetic source positioning method, system and server
  • Three-dimensional heart magnetic source positioning method, system and server

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Embodiment 1

[0034] This embodiment provides a three-dimensional cardiomagnetic source positioning method, the three-dimensional cardiomagnetic source positioning method includes the following steps:

[0035] After the full tensor magnetocardiograph is used to measure in the specified area above the human chest, the uniform field component data of one or more measurement points and the first-order gradient tensor data corresponding to the uniform field component data are obtained, and the original The magnetic field gradient field value of the measuring point;

[0036] According to the pre-established three-dimensional prior array, reconstruct the cardiomagnetic source, and calculate the fitted measurement point magnetic field gradient field value;

[0037] Using the error function used to screen the optimal solution of the magnetocentric source, select the magnetic magneto source corresponding to the smallest value of the error function.

[0038] The method for locating a three-dimension...

Embodiment 2

[0062] This embodiment provides a three-dimensional cardiomagnetic source positioning system 1, please refer to figure 2 , which is a schematic diagram showing the principle structure of a three-dimensional cardiomagnetic source positioning system in an embodiment. Such as figure 2 As shown, the three-dimensional magnetocardiographic source positioning system 1 includes: a data acquisition module 11 , a processing module 12 , a calculation module 13 , and a screening module 14 .

[0063] The data acquisition module 11 is used to obtain the uniform field component data of one measurement point or multiple measurement points and the first-order gradient corresponding to the uniform field component data after the full tensor magnetocardiograph is used to measure in the specified area above the human chest cavity Tensor data, and at the same time obtain the original measurement point magnetic field gradient field value. In this embodiment, the uniform field component data of t...

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Abstract

The invention provides three-dimensional heart magnetic source positioning method, system and server. The three-dimensional magnetic source positioning method comprises the following steps: after measurement in an appointed region above a human chest through a full-tensor magnetocardiography, acquiring homogeneous field component data of one or more measuring points and first order gradient tensor data corresponding to the homogeneous field component data; according to a three-dimensional prior array established in advance, reestablishing a heart magnetic source, and calculating a fit measuring point magnetic field gradient field value; and screening the heart magnetic source corresponding to a minimum value of an error function by utilizing the error function, used for screening an optimal solution, of the heart magnetic source. The three-dimensional heart magnetic source positioning method, system and server have higher resolution to a space discrete distribution source and a time domain overlapping source based on three-dimensional full-tensor magnetocardiogram data; and meanwhile, a three-dimensional prior array optimization algorithm is established, so that the iteration number of the algorithm and the positioning errors are reduced, and the algorithm efficiency is improved.

Description

technical field [0001] The invention belongs to the field of biomedical signal analysis, and relates to a positioning method and system, in particular to a three-dimensional cardiomagnetic source positioning method, system and server. Background technique [0002] Magnetocardiography is a new heart monitoring method based on SQUID system, which has the characteristics of non-invasive, non-radiation and high sensitivity. Clinical studies have shown that magnetocardiography is superior to other monitoring methods such as electrocardiography in the early diagnosis of arrhythmia and myocardial ischemia, and has great application prospects. [0003] Magnetocardiogram source localization is an important method for analyzing magnetocardiogram data. It equates a large number of microcurrent collections generated by electrical activity of cardiac cells into limited current source activities, and uses reconstruction algorithms to calculate the position, direction and Amplitude, , inf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/04
CPCA61B5/7235A61B5/243
Inventor 陶蓉张树林张朝祥
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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