51. An integrated full-head OPM-MEG system based on 128 zero-field sensors.
- Author
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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, and Knappe, Svenja
- Subjects
DETECTORS ,SENSOR arrays ,MAGNETOENCEPHALOGRAPHY ,MAGNETOMETERS ,SYSTEM integration - 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. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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