Magnetometer and magnetocardiograph system for magnetocardiograph based on diamond nitrogen-vacancy center

Abstract

The invention relates to a rectangular hyper-fluorescence-collecting-efficiency magnetometer and magnetocardiograph system for magnetocardiograph based on diamond nitrogen-vacancy center. The magnetometer consists of a magnetic shielding room, a nonmagnetic bed, a magnetocardiograph array probe, a triaxial displacement platform, a high speed data acquiring card, a fiber laser source, a microwave source and a computer, wherein the magnetocardiograph array probe consists of a nonmagnetic housing, a stepping motor, a porous rotary fiber coupling device, a fiber bundle beam, a specially made photodetector (PD), a filter, a loop antenna and a specially made diamond.The rectangular hyper-fluorescence-collecting-efficiency magnetometer has the characteristics of being low in maintenance cost, high in sensitivity and high in adjustability, and is a new-generation high-precision high-efficiency low-cost magnetocardiogram instrument system.

Description

technical field [0001] The invention relates to the field of biomedical instruments, in particular to a magnetometer and a cardiomagnetic measurement system based on a diamond NV color center for cardiomagnetic measurement. Background technique [0002] Magnetocardiography is of great significance in clinical diagnosis. It is widely used in the diagnosis of arrhythmia, myocardial ischemia in coronary heart disease, hypertensive left ventricular hypertrophy, and monitoring of fetal myocardial hypertrophy. It has outstanding advantages in general survey, interventional diagnosis and treatment effect evaluation, and positioning of bypass pathways in WPWP syndrome. [0003] For the magnetocardiograph system SQUID (superconducting quantum interferometer) system currently used in the medical field, although the sensitivity of the low-temperature SQUID system can reach 10fT and the accuracy is sufficient to measure the magnetism, its disadvantage is that the SQUID system must be op...

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Problems solved by technology

[0003] For the magnetocardiograph system SQUID (superconducting quantum interferometer) system currently used in the medical field, although the sensitivity of the low-temperature SQUID system can reach 10fT and the accuracy is sufficient to measure the magnetism, its disadvantage is that the SQUID system must be operated in an ultra-low temperature environment. to work

The cooling method used at the present stage is to use a Dewar bottle to fill liquid helium for cooling, because liquid helium will continue to volatilize with use, so expensive liquid helium must be continuously replenished, which makes the operation and maintenance cost of the SQUID system higher

And due to the low temperature environment and the relatively fixed structure of the SQUID system, it cannot be close to the skin to measure the magnetic field of the heart

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