Gradiometer configuration type brain magnetic measurement system based on SERF atom magnetometer

Abstract

The invention relates to a gradiometer configuration type magnetoencephalogram measurement system based on an SERF atom magnetometer. The gradiometer configuration type magnetoencephalogram measurement system comprises a magnetic shielding room, a brain magnetic measurement cap suitable for a gradiometer configuration mode, an SERF atom magnetometer gradiometer sensor array, an SERF atom magnetometer reference sensor array, a brain magnetic induction stimulation system and a data acquisition and processing system. Compared with a traditional SQUID (superconducting quantum interferometer) magnetoencephalogram measurement system which is high in price, high in operation cost, large in size and heavy in structure, the magnetoencephalogram measurement system based on the SERF atom magnetometeris flexible in structure, the operation cost can be ignored, and magnetoencephalogram measurement the same as that of the SQUID can be achieved. And secondly, compared with other brain magnetic systems which only use the SERF atom magnetometer to perform single-direction magnetic field measurement, the gradiometer configuration type magnetoencephalogram measurement system based on the SERF atom magnetometer can more effectively counteract the environmental magnetic field noise and improve the signal-to-noise ratio.

Description

technical field [0001] The invention relates to the field of biomedical instruments, in particular to a device system using an atomic magnetometer, such as a SERF (Spin-Exchange Relaxation-Free, no spin-exchange relaxation) atomic magnetometer, for gradient brain magnetic measurement. Background technique [0002] Because of its high time resolution and spatial resolution, magnetoencephalography has important application value in clinical and brain science research. The magnetoencephalography technology based on superconducting quantum interference device (SQUID) is mature, but its wide application is limited due to its high price, high maintenance and operation cost, and bulky structure. [0003] Nowadays, SERF magnetometers have been able to achieve the same sensitivity as SQUID devices, so MEG systems based on SERF magnetometers are gradually developing. The magnetoencephalography system based on SERF magnetometer can arrange SERF magnetometer in various positions of the...

AI Technical Summary

Problems solved by technology

[0005] The technical problem of the present invention is: aiming at the shortcomings of the existing SERF magnetometer-based magnetic brain measurement system, a gradiometer-configured magnetic brain measurement system based on SERF atomic magnetometer is provided. Compared with the SQUID magnetic brain measurement system, It can achieve the same magnetic field measurement as SQUID, and the operation and maintenance costs are low; compared with other magnetic field systems that only use SERF atomic magnetometers for single-directional magnetic field measurement, it can more effectively offset the environmental magnetic field noise and improve the signal-to-noise ratio

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