Quantum magnetoencephalography system and method based on magnetic shielding cylinder

Abstract

The invention discloses a quantum magnetoencephalography system and method based on a magnetic shielding cylinder. The system comprises a quantum detector and array system, an environmental magnetic field shielding system, a quantum detector control system, a data acquisition and analysis system, and a stimulation and feedback system, wherein the quantum detector and array system are bidirectionally connected with the quantum detector control system through signals; the quantum detector control system and the stimulation and feedback system are connected with the data acquisition and analysissystem through signals; and the quantum detector and array system is externally provided with the environmental magnetic field shielding system. The quantum magnetoencephalography system and method disclosed by the invention have the technical effects that the operating cost is low; a detection array can be flexibly changed for matching the contour of an individual head, so that the detection efficiency is increased; meanwhile, the system and device can be extended to high-efficiency signal detection of people at different ages; the extra loss of brain magnetic signals is avoided in the spatial distance, and the absolute signal strength is improved; and the magnetic shielding cylinder is used for replacing a shielded room necessary for traditional magnetoencephalography, so that the performance of magnetic shielding is significantly improved while the cost is saved.

Description

technical field [0001] The invention relates to the technical field of magnetoencephalography, specifically a quantum magnetoencephalogram system and method based on a magnetic shielding tube. Background technique [0002] Magnetoencephalography is a noninvasive brain functional imaging method that infers the activity of neurons inside the brain by measuring the magnetic field generated by neural currents outside the head. Magnetoencephalography has ultra-high temporal resolution and high spatial resolution, and plays an important role in the diagnosis of neurological and mental diseases and the research of cognitive neuroscience. [0003] The signal of the brain magnetic field is very weak, about 0.1-1pT outside the scalp. The current commercial magnetoencephalography uses a superconducting quantum interference device (SQUID) as the core device for magnetic field detection, but SQUID needs to work under superconducting conditions maintained by liquid helium, and at the sam...

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Problems solved by technology

[0006] 1. Existing commercial magnetoencephalograms use superconducting devices, which need to consume liquid helium and are costly

[0007] 2. The existing commercial magnetoencephalogram has a weak signal because the thickness of the Dewar tank limits the close contact between the detector and the scalp

[0008] 3. The current commercial magnetoencephalogram cannot match the contour of the individual head because the detection array is fixed on the inner layer of the Dewar, resulting in a further decrease in signal, especially for subjects with small heads such as children, the signal loss is serious, and special Buy another device for a small helmet for children

[0009] 4. The current cost of magnetoencephalography is too high, and an expensive shielding room needs to be built at the same time, which is expensive

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