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Non-Invasive Functional-Brain-Imaging with an OPM-based Magnetoencephalography System

Journal Article · · PLoS ONE
 [1];  [2];  [2];  [2];  [3];  [4];  [5];  [6];  [2]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); DOE/OSTI
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  3. Candoo Systems Inc., Coquitlam, BC (Canada)
  4. StimScience, Inc., Berkeley, CA (United States)
  5. Univ. of Washington, Seattle, WA (United States)
  6. The Mind Research Network and Lovelace Biomedical and Environmental Research Inst., Albuquerque, NM (United States)

A non-invasive functional-brain-imaging system based on optically-pumped-magnetometers (OPM) is presented. The OPM-based magnetoencephalography (MEG) system features 20 OPM channels conforming to the subject’s scalp. We have conducted two MEG experiments on three subjects: assessment of somatosensory evoked magnetic field (SEF) and auditory evoked magnetic field (AEF) using our OPM-based MEG system and a commercial MEG system based on superconducting quantum interference devices (SQUIDs). We cross validated the robustness of our system by calculating the distance between the location of the equivalent current dipole (ECD) yielded by our OPM-based MEG system and the ECD location calculated by the commercial SQUID-based MEG system. We achieved sub-centimeter accuracy for both SEF and AEF responses in all three subjects. Due to the proximity (12 mm) of the OPM channels to the scalp, it is anticipated that future OPM-based MEG systems will offer enhanced spatial resolution as they will capture finer spatial features compared to traditional MEG systems employing SQUIDs.

Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division
Grant/Contract Number:
NA0003525
OSTI ID:
1628983
Journal Information:
PLoS ONE, Journal Name: PLoS ONE Journal Issue: 1 Vol. 15; ISSN 1932-6203
Publisher:
Public Library of ScienceCopyright Statement
Country of Publication:
United States
Language:
English

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