Magnetocardiogram generating method and system

Abstract

The invention provides a magnetocardiogram generating method and system applied to a magnetocardiography. The magnetocardiogram generating method comprises the steps that firstly, the data in one cycle of each channel is intercepted, one point is selected from the intercepted data, the data of each channel at the point is get out, and then the position coordinates corresponding to the channels on the upper chest are calculated; secondly, the data of all the channels at the point correspond to the coordinates; thirdly, the two-dimensional magnetocardiogram data which are well arranged according to positions is subjected to two-dimensional interpolation; fourthly, the two-dimensional data obtained after interpolation is subjected to color table query; fifthly, a magnetocardiogram is drawn. The magnetocardiogram generated by using the method is clear in image and uniform in color distribution, and positive and negative dipoles can be clearly seen in the T wave band. Besides, if the magnetocardiograms from the S band to the T band of the QRS wave at different points are drawn according to a set step length, spatio-temporal evolution process of the heart activity current can be seen, and a doctor can diagnose whether a patient suffers from a heart disease or not according to the number of the dipoles of the magnetocardiogram and the evolution direction of the heart activity current.

Description

technical field [0001] The invention belongs to the field of biomedical signal analysis, and in particular relates to a magnetocardiogram generation method and system applied to a magnetocardiography instrument. Background technique [0002] Electrocardiograph (ECG) is formed by the periodic polarization and depolarization process of cardiomyocytes. However, since the ECG signal is transmitted through human tissues, the signal loss is relatively large, and the conduction of magnetic signals is not affected by tissues such as muscles. So magnetocardiogram (magnetocardiogram, MCG) has become a hotspot in recent research. [0003] The magnetocardiogram uses a multi-channel magnetocardiograph to measure the magnetic field strength in different areas above the human heart, and displays the measured magnetic field values ​​in different colors according to their positions. Studies have shown that magnetocardiography has obvious advantages in the diagnosis and risk classification o...

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Problems solved by technology

Chinese Patent Document No. CN1552285A Publication (Announcement) Day 2004.12.08 discloses a kind of electrocardiogram and its analysis method, but this method only draws the cardiomagnetic signals measured at the same time in different positions on the same coordinate axis , cannot reflect the magnetic field distribution

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