Thermal Analysis of Wearable OPM-MEG Array System for Auditory Evoked Experiments

Magnetoencephalography with optically pumped magnetometers (OPM-MEG): the next generation of functional neuroimaging

“…However, as systems move towards higher numbers of sensors, a greater amount of heat will be dissipated, with the potential to become uncomfortable for the participant. Future OPM-MEG systems may then require active cooling (e.g., cold air or water forced through the helmet [59]). In this context, a new generation of OPMs based on paramagnetic resonance of helium-4, which do not require either heating or cooling, shows promise [60][61][62].…”

A 90‐channel triaxial magnetoencephalography system using optically pumped magnetometers

“…Future OPM‐MEG systems may then require active cooling within the OPM helmet. 59 Finally, although our magnetic field compensation approach successfully provided a low‐field environment, the location of the nulled volume was at the center of the room and around 0.5 × 0.5 × 0.5 m 3 in volume. This means that while head movements can be carried out with minimal effect on sensor operation, larger movements (e.g., a participant walking) remain prohibited.…”

“…However, as systems move toward higher numbers of sensors, greater amounts of heat will dissipate with the potential to become uncomfortable for the participant. Future OPM‐MEG systems may then require active cooling within the OPM helmet 59 . Finally, although our magnetic field compensation approach successfully provided a low‐field environment, the location of the nulled volume was at the center of the room and around 0.5 × 0.5 × 0.5 m 3 in volume.…”