Projects per year
Abstract
Magnetoencephalography (MEG) based on optically pumped magnetometers (OPMs) has been hailed as the future of electrophysiological recordings from the human brain. In this work, we investigate how the dimensions of the sensing volume (the vapour cell) affect the performance of both a single OPM-MEG sensor and a multi-sensor OPM-MEG system. We consider a realistic noise model that accounts for background brain activity and residual noise. By using source reconstruction metrics such as localization accuracy and time-course reconstruction accuracy, we demonstrate that the best overall sensitivity and reconstruction accuracy are achieved with cells that are significantly longer and wider that those of the majority of current commercial OPM sensors. Our work provides useful tools to optimise the cell dimensions of OPM sensors in a wide range of environments.
Original language | English |
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Article number | 119747 |
Number of pages | 10 |
Journal | NeuroImage |
Volume | 264 |
Early online date | 18 Nov 2022 |
DOIs | |
Publication status | Published - 1 Dec 2022 |
Keywords
- optically pumped magnetometer
- sensing volume
- magnetoencephalography
- optimisation
- Source reconstruction
- Quantum sensors
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UK National Quantum Technology Hub in Sensing and Timing
Attallah, M., Jones, R., Metje, N., Constantinou, C., Roberts, C., Faramarzi, A., Singh, Y., Holynski, M., Bongs, K., Baker, C. & Antoniou, M.
Engineering & Physical Science Research Council
1/12/19 → 30/11/24
Project: Research Councils
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Phase coding in the visual system: neuronal processing coordinated by brain oscillations
1/11/17 → 1/11/23
Project: Research
Datasets
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Optimising the sensing volume of OPM sensors for MEG source reconstruction
Bezsudnova, Y. (Creator), Jensen, O. (Creator), Barontini, G. (Creator), Kowalczyk, A. (Creator) & Koponen, L. (Creator), University of Birmingham, 30 Nov 2022
DOI: https://www.sciencedirect.com/science/article/pii/S1053811922008680?via%3Dihub
Dataset