Practical real-time MEG-based neural interfacing with optically pumped magnetometers [PDF]
BMC Biology, 2021 Background Brain-computer interfaces decode intentions directly from the human brain with the aim to restore lost functionality, control external devices or augment daily experiences.
Benjamin Wittevrongel +9 more
doaj +2 more sources
Calibration and Localization of Optically Pumped Magnetometers Using Electromagnetic Coils [PDF]
Sensors, 2022 In this paper, we propose a method to estimate the position, orientation, and gain of a magnetic field sensor using a set of (large) electromagnetic coils.
Joonas Iivanainen +8 more
doaj +2 more sources
Bias Calibration of Optically Pumped Magnetometers Based on Variable Sensitivity [PDF]
SensorsOptically pumped magnetometers (OPMs) functioning in the spin-exchange relaxation-free (SERF) regime have emerged as attractive options for measuring weak magnetic fields, owing to their portability and remarkable sensitivity.
Jieya Chen +4 more
doaj +2 more sources
Multi-Parameter Optimization of Rubidium Laser Optically Pumped Magnetometers with Geomagnetic Field Intensity [PDF]
Sensors, 2023 Rubidium laser optically pumped magnetometers (OPMs) are widely used magnetic sensors based on the Zeeman effect, laser pumping, and magnetic resonance principles. They measure the magnetic field by measuring the magnetic resonance signal passing through
Kun Xu +9 more
doaj +2 more sources
A customized bed based stand alone array of optically pumped magnetometers for fetal magnetocardiography measurements [PDF]
Scientific ReportsFetal magnetocardiography (fMCG) is a non-invasive technique that measures the magnetic fields associated with fetal heart electrical activity outside of the maternal abdomen.
Diana Escalona-Vargas +4 more
doaj +2 more sources
Measuring the cortical tracking of speech with optically-pumped magnetometers
NeuroImage, 2021 During continuous speech listening, brain activity tracks speech rhythmicity at frequencies matching with the repetition rate of phrases (0.2–1.5 Hz), words (2–4 Hz) and syllables (4–8 Hz).
Paul de Lange +8 more
doaj +3 more sources
Distributed network of optically pumped magnetometers for space weather monitoring [PDF]
Scientific ReportsSpatial variation in the intensity of magnetospheric and ionospheric fluctuations during solar storms creates ground-induced currents, of importance in both infrastructure engineering and geophysical science.
Marcin S. Mrozowski +8 more
doaj +2 more sources
Facial magnetomyography using an array of optically pumped magnetometers. [PDF]
Clin Neurophysiol PractMeasuring facial muscle activity is crucial in the diagnosis of facial palsy. This study investigated whether contactless Magnetomyography (MMG) using optically pumped magnetometers (OPM) is feasible for visualizing facial muscle activity.An anatomically shaped mask featuring eleven OPM was arranged on one side of the face of five healthy subjects. MMG
von Fraunberg J +10 more
europepmc +3 more sources
Contactless measurements of retinal activity using optically pumped magnetometers
NeuroImage, 2021 Optically pumped magnetometers (OPMs) have been adopted for the measurement of brain activity. Without the need to be cooled to cryogenic temperatures, an array of these sensors can be placed more flexibly, which allows for the recording of neuronal ...
Britta U. Westner +4 more
doaj +5 more sources
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