Author:
Alem Orang,Hughes K. Jeramy,Buard Isabelle,Cheung Teresa P.,Maydew Tyler,Griesshammer Andreas,Holloway Kendall,Park Aaron,Lechuga Vanessa,Coolidge Collin,Gerginov Marja,Quigg Erik,Seames Alexander,Kronberg Eugene,Teale Peter,Knappe Svenja
Abstract
Compact optically-pumped magnetometers (OPMs) are now commercially available with noise floors reaching 10 fT/Hz1/2. However, to be used effectively for magnetoencephalography (MEG), dense arrays of these sensors are required to operate as an integrated turn-key system. In this study, we present the HEDscan, a 128-sensor OPM MEG system by FieldLine Medical, and evaluate its sensor performance with regard to bandwidth, linearity, and crosstalk. We report results from cross-validation studies with conventional cryogenic MEG, the Magnes 3,600 WH Biomagnetometer by 4-D Neuroimaging. Our results show high signal amplitudes captured by the OPM-MEG system during a standard auditory paradigm, where short tones at 1000 Hz were presented to the left ear of six healthy adult volunteers. We validate these findings through an event-related beamformer analysis, which is in line with existing literature results.
Cited by
7 articles.
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