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Wearable magnetoencephalography instrument environmental noise suppression system and method

A technology of environmental noise and magnetoencephalography, applied in the field of magnetoencephalogram detection, can solve problems such as environmental noise interference, achieve the effects of suppressing environmental noise, simple structure, and improving the signal-to-noise ratio of magnetic brain signals

Pending Publication Date: 2021-12-10
JIHUA LAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on this, the application provides a wearable magnetoencephalograph environmental noise suppression system and method to solve the problem that a wearable magnetoencephalograph based on a small atomic magnetometer is susceptible to environmental noise interference, and to ensure the hardware structure of the small atomic magnetometer and brain On the basis of constant magnetic signal amplitude, environmental noise suppression can be realized, and the signal-to-noise ratio of MEG can be effectively improved

Method used

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  • Wearable magnetoencephalography instrument environmental noise suppression system and method
  • Wearable magnetoencephalography instrument environmental noise suppression system and method
  • Wearable magnetoencephalography instrument environmental noise suppression system and method

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Embodiment 1

[0045]The application provides a system for suppressing environmental noise of a wearable magnetoencephalograph, which includes a magnetically shielded room 1. The subject wears a magnetically encephalograph cap 2 and places it in the magnetically shielded room 1. A slot array is set, an atomic magnetometer detection sensor array 3 is set in the slot array, and an atomic magnetometer reference sensor array 4 is set above the subject's head,

[0046] The signals detected by the atomic magnetometer detection sensor array 3 and the atomic magnetometer reference sensor array 4 pass through the atomic magnetometer electronic system 7 outside the magnetic shielding room 1, and output to the sensor control acquisition and processing system 8, Carry out environmental noise removal and related processing of magnetic brain data.

[0047] The magnetic shielding room 1 also includes an audiovisual stimulator module 9 for producing various sensory stimuli. The audiovisual stimulator module...

Embodiment 2

[0054] A method for suppressing environmental noise of a wearable magnetoencephalograph, which can also be called a virtual synthetic gradient denoising method, comprising: the suppression of environmental noise for a wearable magnetoencephalograph is carried out in a magnetically shielded room 1, and the subject wears a magnetoencephalogram on the head The measurement cap 2 receives the auditory, visual or tactile stimuli generated by the audiovisual stimulator module 9, and is controlled by the stimulus module control system 10. The atomic magnetometer reference sensor array 4 is arranged above the subject's head, and the atomic magnetic force The signals of the reference sensor array 4 and the atomic magnetometer detection sensor array 3 arranged in the magnetic brain measurement cap 2 pass through the atomic magnetometer electronics system 7 outside the magnetic shielding room 1, and are output to the sensor for control, acquisition and processing. System 8, for removing en...

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Abstract

The invention belongs to the technical field of magnetoencephalography detection, and provides a wearable magnetoencephalography instrument environmental noise suppression system and method. The system comprises a magnetic shielding room, a magnetoencephalography measuring cap, an atomic magnetometer detection sensor array and an atomic magnetometer reference sensor array, wherein a testee wears the magnetoencephalography measuring cap on the head and is placed in the magnetic shielding room, the atomic magnetometer detection sensor array is arranged in the magnetoencephalography measuring cap, and the atomic magnetometer reference sensor array is arranged above the head of the testee. The system is simpler in structure, light and flexible. In addition, according to the wearable magnetoencephalography instrument environmental noise suppression method, gradient arrangement configuration does not need to be carried out on each atomic magnetometer detection sensor, on the basis that the configuration of the detection sensors on the original flexible measuring cap is kept unchanged, the intensity of magnetoencephalography signals can be kept not attenuated, the environmental noise of the shielding room can be effectively suppressed, and the signal-to-noise ratio of the magnetoencephalography signals is improved.

Description

technical field [0001] The present application relates to the technical field of magnetoencephalogram detection, in particular to a wearable magnetoencephalogram environmental noise suppression system and method. Background technique [0002] Magnetoencephalography (MEG) is a non-invasive, real-time neuroimaging technique that detects the magnetic field generated by the electrical activity of brain neurons. It plays an important role and has broad application prospects in brain science research and neurosurgery clinical diagnosis. The weak magnetic sensor used in the current commercial MEG is a superconducting quantum interference device (SuperconductorQuantum Interference Devices, SQUID). In recent years, a new type of quantum weak magnetic sensor - spin-exchange relaxation (SERF) atomic magnetometer (Optically-pumped magnetometer, OPM) has been developed rapidly, which can achieve the equivalent of SQUID without working in an ultra-low temperature environment. Detection s...

Claims

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Application Information

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IPC IPC(8): A61B5/246A61B5/00
CPCA61B5/246A61B5/6803A61B5/7207
Inventor 陈春巧胡涛张明康张欣常严冯晓宇杨晓冬
Owner JIHUA LAB
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