Magnetoencephalography with an atomic magnetometer

被引：358

作者：

Xia, H. ^{[1
]}

Baranga, A. Ben-Amar ^{[1
]}

Hoffman, D. ^{[1
]}

Romalis, M. V. ^{[1
]}

机构：

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

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 21期

基金：

美国国家卫生研究院;

关键词：

D O I：

10.1063/1.2392722

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The authors demonstrate detection and mapping of brain magnetic fields evoked by auditory stimulation with a noncryogenic magnetometer based on spin precession of potassium atoms in spin-exchange-relaxation-free regime. Optical readout using a photodiode array allows flexibility in detector placement while using common elements for most components of the multichannel system. Absence of a cryogenic dewar eliminates magnetic Johnson noise from radiation shields and allows the use of a compact magnetic shield with a high shielding factor. The magnetometer sensitivity is currently equal to 3.5 fT/Hz(1/2) at 10 Hz, similar to superconducting quantum interference device magnetoencephalography systems. (c) 2006 American Institute of Physics.

引用

页数：3

共 15 条

[1] Dynamical mapping of the human cardiomagnetic field with a room-temperature, laser-optical sensor [J].