Magnetoencephalography with an atomic magnetometer

H. Xia; A. Ben-Amar Baranga; D. Hoffman; M. V. Romalis

doi:10.1063/1.2392722

Magnetoencephalography with an atomic magnetometer

H. Xia
, A. Ben-Amar Baranga
, D. Hoffman
, M. V. Romalis

Princeton University

Research output: Contribution to journal › Article › peer-review

266 Scopus citations

Abstract

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 Hz12 at 10 Hz, similar to superconducting quantum interference device magnetoencephalography systems.

Original language	English (US)
Article number	211104
Journal	Applied Physics Letters
Volume	89
Issue number	21
DOIs	https://doi.org/10.1063/1.2392722
State	Published - 2006

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2392722

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title = "Magnetoencephalography with an atomic magnetometer",

abstract = "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 Hz12 at 10 Hz, similar to superconducting quantum interference device magnetoencephalography systems.",

author = "H. Xia and \{Ben-Amar Baranga\}, A. and D. Hoffman and Romalis, \{M. V.\}",

note = "Funding Information: The authors would like to thank V. van Wassenhove, J. Haxby, and K. Kim for useful discussions. This work was supported by the NIH.",

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language = "English (US)",

volume = "89",

journal = "Applied Physics Letters",

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publisher = "American Institute of Physics",

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T1 - Magnetoencephalography with an atomic magnetometer

AU - Xia, H.

AU - Ben-Amar Baranga, A.

AU - Hoffman, D.

AU - Romalis, M. V.

N1 - Funding Information: The authors would like to thank V. van Wassenhove, J. Haxby, and K. Kim for useful discussions. This work was supported by the NIH.

PY - 2006

Y1 - 2006

N2 - 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 Hz12 at 10 Hz, similar to superconducting quantum interference device magnetoencephalography systems.

AB - 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 Hz12 at 10 Hz, similar to superconducting quantum interference device magnetoencephalography systems.

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U2 - 10.1063/1.2392722

DO - 10.1063/1.2392722

M3 - Article

SN - 0003-6951

VL - 89

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 21

M1 - 211104

ER -

Magnetoencephalography with an atomic magnetometer

Abstract

ASJC Scopus subject areas

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