Magnetic field imaging with microfabricated optically-pumped magnetometers
Optics Express, 2017 A multichannel imaging system is presented, consisting of 25 microfabricated optically-pumped magnetometers. The sensor probes have a footprint of less than 1 cm2 and a sensitive volume of 1.5 mm × 1.5 mm × 1.5 mm and connect to a control unit through optical fibers of length 5 m.
Alem, Orang +8 more
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Detection of the 40 Hz auditory steady-state response with optically pumped magnetometers [PDF]
Scientific Reports, 2022 Magnetoencephalography (MEG) is a functional neuroimaging technique that noninvasively detects the brain magnetic field from neuronal activations. Conventional MEG measures brain signals using superconducting quantum interference devices (SQUIDs).
Kyung-min An +11 more
doaj +2 more sources
Non-invasive measurements of ictal and interictal epileptiform activity using optically pumped magnetometers [PDF]
Scientific Reports, 2023 Magneto- and electroencephalography (MEG/EEG) are important techniques for the diagnosis and pre-surgical evaluation of epilepsy. Yet, in current cryogen-based MEG systems the sensors are offset from the scalp, which limits the signal-to-noise ratio (SNR)
Arjan Hillebrand +11 more
doaj +2 more sources
Improved spatio-temporal measurements of visually evoked fields using optically-pumped magnetometers [PDF]
Scientific Reports, 2021 Recent developments in performance and practicality of optically-pumped magnetometers (OPMs) have enabled new capabilities in non-invasive brain function mapping through magnetoencephalography.
Aikaterini Gialopsou +11 more
doaj +2 more sources
Feasibility of magnetomyography with optically pumped magnetometers in a mobile magnetic shield [PDF]
Scientific ReportsWhile magnetomyography (MMG) using optically pumped magnetometers (OPMs) is a promising method for non-invasive investigation of the neuromuscular system, it has almost exclusively been performed in magnetically shielded rooms (MSRs) to date.
Simon Nordenström +6 more
doaj +2 more sources
Cross-Axis projection error in optically pumped magnetometers and its implication for magnetoencephalography systems [PDF]
NeuroImage, 2022 Optically pumped magnetometers (OPMs) developed for magnetoencephalography (MEG) typically operate in the spin-exchange-relaxation-free (SERF) regime and measure a magnetic field component perpendicular to the propagation axis of the optical-pumping ...
Amir Borna +6 more
doaj +2 more sources
Applied Sciences, 2020 This paper analyzes the noise sources in photoelectric detection circuits with several low-noise operational amplifiers cores. The fabricated circuits are low-noise pre-amplifiers that are used for optically pumped magnetometers. In the proposed circuits,
Leisong Liu +4 more
doaj +2 more sources
Feasibility study on on-board magnetoencephalography with optically pumped magnetometers
AIP AdvancesIn this study, the theoretical feasibility of utilizing optically pumped magnetometers for on-board magnetoencephalography measurements was explored.
Xinyu Cao +4 more
doaj +2 more sources
Simplified shielded MEG-MRI multimodal system with scalar-mode optically pumped magnetometers as MEG sensors [PDF]
Scientific ReportsMagnetoencephalography (MEG) conventionally operates within high-performance magnetic shields due to the extremely weak magnetic field signals from the measured objects and the narrow dynamic range of the magnetic sensors employed for detection.
Yosuke Ito +5 more
doaj +2 more sources
Concurrent spinal and brain imaging with optically pumped magnetometers [PDF]
Journal of Neuroscience MethodsThe spinal cord and its interactions with the brain are fundamental for movement control and somatosensation. However, brain and spinal electrophysiology in humans have largely been treated as distinct enterprises, in part due to the relative inaccessibility of the spinal cord.
Mardell, Lydia C +7 more
openaire +4 more sources