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Benchmarking for On-Scalp MEG Sensors

M. S. Xie ; J. F. Schneiderman ; Maxim Chukharkin (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; Alexey Kalabukhov (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; B. Riaz ; D. Lundqvist ; S. Whitmarsh ; M. Hamalainen ; V. Jousmaki ; R. Oostenveld ; Dag Winkler (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik)
Ieee Transactions on Biomedical Engineering (0018-9294). Vol. 64 (2017), 6, p. 1270-1276.
[Artikel, refereegranskad vetenskaplig]

Objective: We present a benchmarking protocol for quantitatively comparing emerging on-scalp magnetoencephalography (MEG) sensor technologies to their counterparts in state-of-the-art MEG systems. Methods: As a means of validation, we compare a high-critical-temperature superconducting quantum interference device (high T-c SQUID) with the low-T-c SQUIDs of an Elekta Neuromag TRIUX system in MEG recordings of auditory and somatosensory evoked fields (SEFs) on one human subject. Results: We measure the expected signal gain for the auditory-evoked fields (deeper sources) and notice some unfamiliar features in the on-scalp sensor-based recordings of SEFs (shallower sources). Conclusion: The experimental results serve as a proof of principle for the benchmarking protocol. This approach is straightforward, general to various on-scalp MEG sensors, and convenient to use on human subjects. The unexpected features in the SEFs suggest on-scalp MEG sensors may reveal information about neuromagnetic sources that is otherwise difficult to extract from state-of-the-art MEG recordings. Significance: As the first systematically established on-scalp MEG benchmarking protocol, magnetic sensor developers can employ this method to prove the utility of their technology in MEG recordings. Further exploration of the SEFs with on-scalp MEG sensors may reveal unique information about their sources.

Nyckelord: Auditory and somatosensory evoked fields (AEF and SEF), benchmark, high-temperature, system, dipole, brain, Engineering



Denna post skapades 2017-07-13.
CPL Pubid: 250678

 

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