A magnetocardiometric measurement and magnetocardiogram generation system based on a serf atomic magnetometer

Abstract

The present invention relates to a kind of magnetic measurement and magnetocardiogram generation system based on SERF (Spin-Exchange Relaxation-Free, no spin exchange relaxation) atomic magnetometer, the system mainly includes: magnetic shielding barrel (room), SERF Atomic magnetometer, data acquisition module and magnetocardiogram generation module. The magnetic shielding barrel (room) is used to shield the earth's magnetic field and provide a zero-magnetic environment for the SERF atomic magnetometer. The SERF atomic magnetometer can measure the cardiomagnetic signal normal to the chest surface, and the signal collected by the data acquisition module is processed by signal processing. Afterwards, the isomagnetic field diagram and current density diagram are drawn. Compared with the magnetic system using the superconducting quantum interferometer, the system proposed by the present invention has lower operation and maintenance costs, and can realize high-sensitivity and convenient close-fitting magnetic measurement and magnetocardiogram generation.

Description

technical field [0001] The invention relates to the field of biomedical instruments, in particular to a system that uses a SERF (Spin-ExchangeRelaxation-Free, no spin exchange relaxation) atomic magnetometer to measure magnetism and generate a magnetocardiogram. Background technique [0002] Magnetocardiography is of great value in clinical applications, such as the diagnosis of arrhythmia, myocardial ischemia, and monitoring of patients with coronary heart disease before and after treatment. etc. have more prominent advantages. [0003] At present, the magnetocardiograph systems used in the medical field are all SQUID (superconducting quantum interferometer) systems, and the sensitivity of the low-temperature SQUID system can reach 10fT. However, when the SQUID system works in a low temperature environment, it needs to be filled with liquid helium in the Dewar bottle for cooling. The liquid helium will continue to evaporate during use, so it needs to be continuously replen...

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Problems solved by technology

However, when the SQUID system works in a low temperature environment, it needs to be filled with liquid helium in the Dewar bottle for cooling. The liquid helium will continue to evaporate during use, so it needs to be continuously replenished with liquid helium, and the price of liquid helium is expensive. Therefore, the operation and maintenance cost of the SQUID system is relatively high.

At the same time, the SQUID system is bulky and inconvenient to operate, and due to its fixed structure, when measuring different individuals, it cannot be well attached to the surface of the chest cavity to achieve shorter distance measurements

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