@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 BV",
}