ArticleIEEE transactions on bio-medical engineering2022
Magnetic Field Mapping and Correction for Moving OP-MEG.
Article in IEEE transactions on bio-medical engineering, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.
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Who cites it
21 citing papers in PubMed, 53 citations in OpenAlex.
- OPM-MEG reveals dynamics of beta bursts underlying attentional processes in sensory cortex.Scientific reports · 2025Article
- Using Wearable MEG to Study the Neural Control of Human Stepping.Sensors (Basel, Switzerland) · 2025Article
- Determining sensor geometry and gain in a wearable MEG system.Imaging neuroscience (Cambridge, Mass.) · 2025Article
- Pushing the boundaries of MEG based on optically pumped magnetometers towards early human life.Imaging neuroscience (Cambridge, Mass.) · 2025Article
- Noise Reduction and Localization Accuracy in a Mobile Magnetoencephalography System.Sensors (Basel, Switzerland) · 2024Article
- Adaptive multipole models of optically pumped magnetometer data.Human brain mapping · 2024Article
- Simultaneous whole-head electrophysiological recordings using EEG and OPM-MEG.Imaging neuroscience (Cambridge, Mass.) · 2024Article
- Article
- Enabling ambulatory movement in wearable magnetoencephalography with matrix coil active magnetic shielding.NeuroImage · 2023Article
- Application of VCSEL in Bio-Sensing Atomic Magnetometers.Biosensors · 2022Review
- Cross-Axis Dynamic Field Compensation of Optically Pumped Magnetometer Arrays for MEG.NeuroImage · 2022Article
- Spin exchange optically pumped nuclear spin self compensation system for moving magnetoencephalography measurement.Biomedical optics express · 2022Article
- Wearable OPM-MEG: A changing landscape for epilepsy.Epilepsia · 2022Review
- Spherical harmonic based noise rejection and neuronal sampling with multi-axis OPMs.NeuroImage · 2022Article
- A lightweight magnetically shielded room with active shielding.Scientific reports · 2022Article
- Calibration and Localization of Optically Pumped Magnetometers Using Electromagnetic Coils.Sensors (Basel, Switzerland) · 2022Article
- Imaging somatosensory cortex responses measured by OPM-MEG: Variational free energy-based spatial smoothing estimation approach.iScience · 2022Article
- Interference suppression techniques for OPM-based MEG: Opportunities and challenges.NeuroImage · 2022Article
- Quantum enabled functional neuroimaging: the why and how of magnetoencephalography using optically pumped magnetometers.Contemporary physics · 2022Article
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Corrections and comments
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Authors and funding
17 authors at 4 institutions in 2 countries.
Funding
Abstract
backgroundOptically pumped magnetometers (OPMs) have made moving, wearable magnetoencephalography (MEG) possible. The OPMs typically used for MEG require a low background magnetic field to operate, which is achieved using both passive and active magnetic shielding. However, the background magnetic field is never truly zero Tesla, and so the field at each of the OPMs changes as the participant moves. This leads to position and orientation dependent changes in the measurements, which manifest as low frequency artefacts in MEG data.
objectiveWe model the spatial variation in the magnetic field and use the model to predict the movement artefact found in a dataset.
methodsWe demonstrate a method for modelling this field with a triaxial magnetometer, then show that we can use the same technique to predict the movement artefact in a real OPM-based MEG (OP-MEG) dataset.
resultsUsing an 86-channel OP-MEG system, we found that this modelling method maximally reduced the power spectral density of the data by 27.8 ± 0.6 dB at 0 Hz, when applied over 5 s non-overlapping windows.
conclusionThe magnetic field inside our state-of-the art magnetically shielded room can be well described by low-order spherical harmonic functions. We achieved a large reduction in movement noise when we applied this model to OP-MEG data. SIGNIFICANCE: Real-time implementation of this method could reduce passive shielding requirements for OP-MEG recording and allow the measurement of low-frequency brain activity during natural participant movement.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.