Recording brain activities in unshielded Earth's field with optically pumped atomic magnetometers

被引：155

作者：

Zhang, Rui ^{[1
,2
,3
,4
]}

Xiao, Wei ^{[1
,2
]}

Ding, Yudong ^{[1
,2
]}

Feng, Yulong ^{[1
,2
]}

Peng, Xiang ^{[1
,2
]}

Shen, Liang ^{[5
]}

Sun, Chenxi ^{[1
,2
]}

Wu, Teng ^{[1
,2
]}

Wu, Yulong ^{[1
,2
]}

Yang, Yucheng ^{[1
,2
]}

Zheng, Zhaoyu ^{[1
,2
]}

Zhang, Xiangzhi ^{[1
,2
]}

Chen, Jingbiao ^{[1
,2
]}

Guo, Hong ^{[1
,2
]}

机构：

[1] Peking Univ, Dept Elect, State Key Lab Adv Opt Commun Syst & Networks, Beijing 100871, Peoples R China

[2] Peking Univ, Ctr Quantum Informat Technol, Beijing 100871, Peoples R China

[3] Natl Univ Def Technol, Coll Liberal Arts & Sci, Changsha 410073, Hunan, Peoples R China

[4] Natl Univ Def Technol, Interdisciplinary Ctr Quantum Informat, Changsha 410073, Hunan, Peoples R China

[5] Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China

来源：

SCIENCE ADVANCES | 2020年 / 6卷 / 24期

基金：

中国国家自然科学基金;

关键词：

MAGNETIC-FIELDS; MAGNETOENCEPHALOGRAPHY; DISRUPTION; EPILEPSY; EEG;

D O I：

10.1126/sciadv.aba8792

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Understanding the relationship between brain activity and specific mental function is important for medical diagnosis of brain symptoms, such as epilepsy. Magnetoencephalography (MEG), which uses an array of high-sensitivity magnetometers to record magnetic field signals generated from neural currents occurring naturally in the brain, is a noninvasive method for locating the brain activities. The MEG is normally performed in a magnetically shielded room. Here, we introduce an unshielded MEG system based on optically pumped atomic magnetometers. We build an atomic magnetic gradiometer, together with feedback methods, to reduce the environment magnetic field noise. We successfully observe the alpha rhythm signals related to closed eyes and clear auditory evoked field signals in unshielded Earth's field. Combined with improvements in the miniaturization of the atomic magnetometer, our method is promising to realize a practical wearable and movable unshielded MEG system and bring new insights into medical diagnosis of brain symptoms.

引用

页数：8

共 47 条

[1] Magnetoencephalography of Epilepsy with a Microfabricated Atomic Magnetrode [J].