A bi-planar coil system for nulling background magnetic fields in scalp mounted magnetoencephalography.

NeuroImage
Niall HolmesR Bowtell

Abstract

Small, commercially-available Optically Pumped Magnetometers (OPMs) can be used to construct a wearable Magnetoencephalography (MEG) system that allows large head movements to be made during recording. The small dynamic range of these sensors however means that movement in the residual static magnetic field found inside typical Magnetically Shielded Rooms (MSRs) can saturate the sensor outputs, rendering the data unusable. This problem can be ameliorated by using a set of electromagnetic coils to attenuate the spatially-varying remnant field. Here, an array of bi-planar coils, which produce an open and accessible scanning environment, was designed and constructed. The coils were designed using a harmonic minimisation method previously used for gradient coil design in Magnetic Resonance Imaging (MRI). Six coils were constructed to null Bx, By and Bz as well as the three dominant field gradients dBx/dz, dBy/dz and dBz/dz. The coils produce homogeneous (within ±5%) fields or field gradients over a volume of 40 × 40 × 40 cm3. This volume is sufficient to contain an array of OPMs, mounted in a 3D-printed scanner-cast, during basic and natural movements. Automated control of the coils using reference sensor measurements allows reduct...Continue Reading

References

Aug 1, 1992·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·J W CarlsonM Weideman
Jan 1, 1993·Magnetic Resonance Imaging·R Turner
Jan 5, 1999·IEEE Transactions on Medical Imaging·H Liu, C L Truwit
Jul 26, 2003·Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society·Gregory L Barkley, Christoph Baumgartner
Sep 26, 2006·Nature Neuroscience·Martin I Sereno, Ruey-Song Huang
Jul 29, 2009·NeuroImage·Matthew J BrookesPeter G Morris
May 9, 2012·Biomedical Optics Express·T H SanderS Knappe
May 29, 2012·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Jukka NenonenSeppo Kähkönen
Oct 17, 2012·Proceedings of the National Academy of Sciences of the United States of America·Ruey-Song HuangMartin I Sereno
Aug 14, 2013·Physics in Medicine and Biology·Cort N JohnsonM Weisend
Feb 5, 2014·Current Opinion in Neurobiology·Martin I Sereno, Ruey-Song Huang
Jun 1, 2015·The Review of Scientific Instruments·Jake J Abbott
Nov 9, 2016·Current Biology : CB·Rory John Bufacchi, Gian Domenico Iannetti
Sep 25, 2015·NeuroImage. Clinical·Siân E RobsonPeter G Morris
Dec 23, 2016·NeuroImage·Joonas IivanainenLauri Parkkonen
Oct 17, 2017·Physics in Medicine and Biology·Amir BornaPeter D D Schwindt
Jul 1, 2018·NeuroImage·Eleanor L BarrattMatthew J Brookes

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Citations

Mar 1, 2020·Annals of Clinical and Translational Neurology·Umesh VivekanandaMatthew C Walker
Mar 15, 2020·Sensors·Dmitry MurzinValeria Rodionova
Nov 7, 2019·Nature Communications·Ryan M HillMatthew J Brookes
Apr 16, 2019·Network Neuroscience·Benjamin A E HuntMargot J Taylor
Jul 12, 2019·Human Brain Mapping·Leonardo Duque-MuñozGareth R Barnes
Jul 1, 2019·The Review of Scientific Instruments·Kaiyan HeJia-Hong Gao
Oct 16, 2020·NeuroImage·Tim M TierneyGareth R Barnes
Dec 12, 2020·Scientific Reports·Tim M TierneyGareth R Barnes
Feb 2, 2021·NeuroImage·Elena BotoMatthew J Brookes
Mar 22, 2021·NeuroImage·Paul de LangeMathieu Bourguignon
Aug 5, 2021·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Nobukazu Nakasato
Jul 31, 2021·Human Brain Mapping·Nikolay KoshevPetr Vetoshko
Aug 12, 2021·BMC Biology·Benjamin WittevrongelMatthew J Brookes
Aug 19, 2021·NeuroImage·James J BonaiutoSven Bestmann
Apr 20, 2020·NeuroImage·James J BonaiutoSven Bestmann
Sep 24, 2021·NeuroImage·Robert A SeymourEleanor A Maguire
Jun 8, 2019·NeuroImage·Gillian RobertsMatthew J Brookes
Jan 20, 2022·PloS One·Urban MarhlVojko Jazbinšek

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Software Mentioned

LabVIEW
OptiTrack
MATLAB
QuSpin

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