Determination method of extreme point of magnetocardiogram measurement area
A measurement method and a technique for measuring areas, which can be used in diagnostic recording/measurement, medical science, diagnosis, etc., can solve problems such as unfavorable clinical application, missing cardiomagnetic information, and no practical significance of signal acquisition results, and achieve the effect of promoting clinical application
Inactive Publication Date: 2010-01-20
PEKING UNIV
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Problems solved by technology
The size, position, and grid division of the coverage area selected by this method have a great impact on the effective information content and related analysis of the magnetocardiogram obtained at last, and due to the individual differences in the position of the human heart in the chest cavity Larger, often irrational
If a conservative large-area coverage method is adopted, it is very easy to cause the signal near the boundary point to be too small, and the signal acquisition results have no practical significance. magnetic information is missing
Therefore, the method of determining multi-point measurement points based on human anatomy is very unfavorable for practical work, especially for clinical applications
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[0029] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
[0030] Take the position and signal amplitude of the extremum point in the chest magnetic measurement area as an example:
[0031] 1) Establish a plane Cartesian coordinate system in the magnetic field of the chest.
[0032] 2) if Figure 4 As shown: in the planar Cartesian coordinate system adopted by the embodiment of the present invention, the y-axis direction is roughly the direction of the human torso, and the x-axis direction is the direction perpendicular to the y-axis.
[0033] 3) if Figure 4 Shown: first determine the three measurement grid points (M1, M2, M3) in the coordinates of the human chest measurement plane. Among them, the position of the measurement point M1 can be located at the left or right side of the middle clavicle line (vertical line passing through the middle point of the clavicle) and the fifth intercostal space, ...
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The invention discloses an extreme point measuring method of a magnetocardiogram measuring region, which comprises the following steps: firstly establishing a coordinate system in the magnetocardiogram measuring region in chest front or back of human bodies, selecting three measuring points in a same straight line in the coordinate system, respectively carrying out magnetocardiogram signal measurement, obtaining an extreme value through the interpolation of magnetocardiogram signal values of the measuring points, and determining a coordinate point that is corresponding to the extreme value; taking the coordinate point as a benchmark, selecting another two measuring points in a straight line that is vertical to the above straight line, measuring the magnetocardiogram signals, and carrying out the interpolation of the magnetocardiogram signal values of the three points in the vertical line, and last obtaining the magnetocardiogram signal value of the extreme point in the magnetocardiogram measuring region, which has corresponding coordinate point that is in the extreme point position of the magnetocardiogram measuring region. The extreme point measuring method of the magnetocardiogram measuring region can be utilized for accurately measuring the position of the signal extreme point in a selected magnetocardiogram measuring region and giving the magnetocardiogram signal amplitude of the extreme point, and is convenient for obtaining valuable magnetocardiogram information.
Description
technical field [0001] The invention relates to a heart magnetic field signal measurement technology, in particular to a method for determining the extreme point of a heart magnetic measurement area. Background technique [0002] Electrocardiogram signals can contain more abundant information than conventional ECG signals. The diagnosis of heart diseases by measuring the magnetic field of the human heart is a brand-new heart disease diagnosis technology developed in recent years. The diagnosis is more sensitive, has the advantages of non-contact and non-invasive, and is expected to be used as an important technical means for clinical diagnosis of heart diseases in the near future. [0003] In the process of measuring the cardiac magnetic field, in order to obtain sufficient information on the distribution of the cardiac magnetic field, conduct research on cardiac physics based on magnetic field and perform clinical diagnosis of heart diseases, it is necessary to conduct mult...
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IPC IPC(8): A61B5/05
Inventor 王勋李中达魏星斌焦洁青佟玲高吉王为蒋密高铭马平戴远东聂瑞娟王福仁
Owner PEKING UNIV