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
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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
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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
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High Sample Rate Optically Pumped Helium Magnetometer [PDF]
Journal of Optoelectronical Nanostructures, 2019 Optically pumped helium magnetometers are important instruments whichhave many applications in military, mass spectroscopy and space applications. In thispaper, the working principles of helium magnetometers have been explained.
Abdorreza Asrar +2 more
doaj +1 more source
Using optically pumped magnetometers to replicate task-related responses in next generation magnetoencephalography [PDF]
Scientific ReportsOptically pumped magnetometers (OPMs) offer a new wearable means to measure magnetoencephalography (MEG) signals, with many advantages compared to conventional systems.
Kristina Safar +7 more
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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
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Floquet description of optically pumped magnetometers [PDF]
Physical Review A, 2021 We present theoretical description of Voigt and Faraday effect based optically pumped magnetometers using the Floquet expansion. Our analysis describes the spin-operator dynamics of the first, $\hat{F}(t)$, and second, $\hat{F}^2(t)$, order moments and takes into account of different pumping profiles and decoherence effects.
Hans Marin Florez, Tadas Pyragius
openaire +2 more sources
A 90-channel triaxial magnetoencephalography system using optically pumped magnetometers. [PDF]
Ann N Y Acad Sci, 2022 Rea M +10 more
europepmc +2 more sources
Noninvasive Magnetic-Marking-Based Flow Metering with Optically Pumped Magnetometers
Applied Sciences, 2022 We present a noninvasive procedure that measures the flow velocity of a fluid by using polarized hydrogen nuclei in the fluid. The measurement procedure is based on a time-of-flight method where magnetic information is applied on the fluid with a ...
Leonhard Schmieder +3 more
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Ferrite Shield to Enhance the Performance of Optically Pumped Magnetometers for Fetal Magnetocardiography. [PDF]
J Clin Med, 2023 Tardelli GP +4 more
europepmc +2 more sources