[Movable Array of Magnetoencephalography With Optically Pumped Magnetometers Effectively Captures Primary Auditory-Evoked Response Signals in Healthy Populations at Low Altitudes].

When the distance between the detector and the scalp is 5 mm, the SNR value is the highest, resulting in high sensitivity and high signal strength. On the other hand, even when the distance between the detector and the scalp reaches 15 mm, the SNR of the OPM-MEG is still higher than 16 dB, which meets the clinical signal acquisition requirements. Furthermore, the auditory stimulus source reconstruction results were generally consistent. Changing the scalp-to-detector distance does not affect the applicability of the source localization results, validating the device's effectiveness in signal acquisition.