Multi-channel atomic magnetometer for magnetoencephalography: A configuration study

被引：132

作者：

Kim, Kiwoong ^{[1
]}

Begus, Samo ^{[2
]}

Xia, Hui ^{[3
]}

Lee, Seung-Kyun ^{[3
]}

Jazbinsek, Vojko ^{[4
]}

Trontelj, Zvonko ^{[4
]}

Romalis, Michael V. ^{[3
]}

机构：

[1] Korea Res Inst Stand & Sci, Taejon, South Korea

[2] Fac Elect Engn, Ljubljana, Slovenia

[3] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

[4] Inst Math Phys & Mech, Ljubljana, Slovenia

来源：

NEUROIMAGE | 2014年 / 89卷

关键词：

Atomic magnetometer; Auditory evoked field; Biomedical signal processing; Magnetoencephalography; MEG; SYSTEM;

D O I：

10.1016/j.neuroimage.2013.10.040

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

Atomic magnetometers are emerging as an alternative to SQUID magnetometers for detection of biological magnetic fields. They have been used to measure both the magnetocardiography (MCG) and magnetoencephalography (MEG) signals. One of the virtues of the atomic magnetometers is their ability to operate as a multi-channel detector while using many common elements. Here we study two configurations of such a multi-channel atomic magnetometer optimized for MEG detection. We describe measurements of auditory evoked fields (AEF) from a human brain as well as localization of dipolar phantoms and auditory evoked fields. A clear N100m peak in AEF was observed with a signal-to-noise ratio of higher than 10 after averaging of 250 stimuli. Currently the intrinsic magnetic noise level is 4 fIEz(-1/2) at 10 Hz. We compare the performance of the two systems in regards to current source localization and discuss future development of atomic MEG systems. (C) 2013 Elsevier Inc. All rights reserved.

引用

页码：143 / 151

页数：9

共 25 条

[1] Event-related beamforming: A robust method for presurgical functional mapping using MEG [J].