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  • Multi-channel atomic magnetometer for magnetoencephalography : a configuration study
    Kim, Kiwoong ...
    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 fTHz▫$^{-1/2}$▫ 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.
    Vir: NeuroImage. - ISSN 1053-8119 (Vol. 89, 1 Apr. 2014, str. 143-151)
    Vrsta gradiva - članek, sestavni del ; neleposlovje za odrasle
    Leto - 2014
    Jezik - angleški
    COBISS.SI-ID - 10306644

    Povezava(-e):

    http://dx.doi.org/10.1016/j.neuroimage.2013.10.040

vir: NeuroImage. - ISSN 1053-8119 (Vol. 89, 1 Apr. 2014, str. 143-151)
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