Detection of auditory evoked responses with atomic magnetometer

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

doi:10.1016/j.ics.2007.02.028

Detection of auditory evoked responses with atomic magnetometer

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

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

4 Scopus citations

Abstract

We demonstrate the first detection of brain magnetic fields evoked by auditory stimulation with a non-cryogenic optical magnetometer. We use a spin-exchange-relaxation-free (SERF) alkali-metal magnetometer and map magnetic fields using multi-channel photodiode arrays. This first-generation system has a magnetic noise level of 3.5 fT/Hz^1/2 at 10 Hz, similar to the state-of-the-art cryogenic systems. Absence of a cryogenic dewar eliminates magnetic Johnson noise and allows the use of compact magnetic shields with a high shielding factor.

Original language	English (US)
Pages (from-to)	627-630
Number of pages	4
Journal	International Congress Series
Volume	1300
DOIs	https://doi.org/10.1016/j.ics.2007.02.028
State	Published - Jun 2007

All Science Journal Classification (ASJC) codes

General Medicine

Keywords

Atomic magnetometer
Auditory evoked response
Magnetoencephalography
Spin-exchange-relaxation-free

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10.1016/j.ics.2007.02.028

Cite this

@article{5d139411f4d44ba3bc485d439f0cfe26,

title = "Detection of auditory evoked responses with atomic magnetometer",

abstract = "We demonstrate the first detection of brain magnetic fields evoked by auditory stimulation with a non-cryogenic optical magnetometer. We use a spin-exchange-relaxation-free (SERF) alkali-metal magnetometer and map magnetic fields using multi-channel photodiode arrays. This first-generation system has a magnetic noise level of 3.5 fT/Hz1/2 at 10 Hz, similar to the state-of-the-art cryogenic systems. Absence of a cryogenic dewar eliminates magnetic Johnson noise and allows the use of compact magnetic shields with a high shielding factor.",

keywords = "Atomic magnetometer, Auditory evoked response, Magnetoencephalography, Spin-exchange-relaxation-free",

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

note = "Funding Information: In conclusion, we have demonstrated the first detection of brain magnetic field by a non-cryogenic magnetometer. Future improvements include reduction of low frequency magnetic noise and wider spatial coverage with improved cell and oven design, as well as exploration of various configurations of pump and probe beams to measure different components of the magnetic field and different mapping geometries. The flexibility and low cost of optical mapping of brain magnetic fields should open new applications for functional brain imaging. We would like to thank V. van Wassenhove, J. Haxby, and K. Kim for useful discussions. This work was supported by the NIH. ",

year = "2007",

month = jun,

doi = "10.1016/j.ics.2007.02.028",

language = "English (US)",

volume = "1300",

pages = "627--630",

journal = "International Congress Series",

issn = "0531-5131",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Detection of auditory evoked responses with atomic magnetometer

AU - Xia, H.

AU - Ben-Amar Banranga, A.

AU - Hoffman, D.

AU - Romalis, M. V.

N1 - Funding Information: In conclusion, we have demonstrated the first detection of brain magnetic field by a non-cryogenic magnetometer. Future improvements include reduction of low frequency magnetic noise and wider spatial coverage with improved cell and oven design, as well as exploration of various configurations of pump and probe beams to measure different components of the magnetic field and different mapping geometries. The flexibility and low cost of optical mapping of brain magnetic fields should open new applications for functional brain imaging. We would like to thank V. van Wassenhove, J. Haxby, and K. Kim for useful discussions. This work was supported by the NIH.

PY - 2007/6

Y1 - 2007/6

N2 - We demonstrate the first detection of brain magnetic fields evoked by auditory stimulation with a non-cryogenic optical magnetometer. We use a spin-exchange-relaxation-free (SERF) alkali-metal magnetometer and map magnetic fields using multi-channel photodiode arrays. This first-generation system has a magnetic noise level of 3.5 fT/Hz1/2 at 10 Hz, similar to the state-of-the-art cryogenic systems. Absence of a cryogenic dewar eliminates magnetic Johnson noise and allows the use of compact magnetic shields with a high shielding factor.

AB - We demonstrate the first detection of brain magnetic fields evoked by auditory stimulation with a non-cryogenic optical magnetometer. We use a spin-exchange-relaxation-free (SERF) alkali-metal magnetometer and map magnetic fields using multi-channel photodiode arrays. This first-generation system has a magnetic noise level of 3.5 fT/Hz1/2 at 10 Hz, similar to the state-of-the-art cryogenic systems. Absence of a cryogenic dewar eliminates magnetic Johnson noise and allows the use of compact magnetic shields with a high shielding factor.

KW - Atomic magnetometer

KW - Auditory evoked response

KW - Magnetoencephalography

KW - Spin-exchange-relaxation-free

UR - https://www.scopus.com/pages/publications/34250005797

UR - https://www.scopus.com/pages/publications/34250005797#tab=citedBy

U2 - 10.1016/j.ics.2007.02.028

DO - 10.1016/j.ics.2007.02.028

M3 - Article

AN - SCOPUS:34250005797

SN - 0531-5131

VL - 1300

SP - 627

EP - 630

JO - International Congress Series

JF - International Congress Series

ER -

Detection of auditory evoked responses with atomic magnetometer

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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