Results 31 to 40 of about 90,554 (217)

Tri-axial rubidium and helium optically pumped magnetometers for on-scalp magnetoencephalography recording of interictal epileptiform discharges: a case study. [PDF]

Front Neurosci, 2023
Cryogenic magnetoencephalography (MEG) enhances the presurgical assessment of refractory focal epilepsy (RFE). Optically pumped magnetometers (OPMs) are cryogen-free sensors that enable on-scalp MEG recordings. Here, we investigate the application of tri-
Feys O, Corvilain P, Labyt E, Mahmoudzadeh M, Routier L, Sculier C, Holmes N, Brookes M, Goldman S, Romain R, Mitryukovskiy S, Palacios-Laloy A, Schwartz D, Betrouni N, Derambure P, Wallois F, Wens V, De Tiège X.   +17 more
europepmc   +2 more sources

Magnetoencephalography with optically pumped magnetometers (OPM-MEG): the next generation of functional neuroimaging. [PDF]

Trends Neurosci, 2022
Brookes MJ, Leggett J, Rea M, Hill RM, Holmes N, Boto E, Bowtell R.   +6 more
europepmc   +2 more sources

A Novel Adaptive Independent Component Analysis Method for Multi-Channel Optically Pumped Magnetometers' Magnetocardiography Signals. [PDF]

Biosensors (Basel)
With the gradual maturation of optically pumped magnetometer (OPM) technology, the use of OPMs to acquire weak magnetocardiography (MCG) signals has started to gain widespread application.
Liang S, Qi J, He J, Jia Y, Wang A, Zhao T, Wei C, Jiao H, Feng L, Cheng H.   +9 more
europepmc   +2 more sources

Modelling optically pumped magnetometer interference in MEG as a spatially homogeneous magnetic field

NeuroImage, 2021
Here we propose that much of the magnetic interference observed when using optically pumped magnetometers for MEG experiments can be modeled as a spatially homogeneous magnetic field.
Tim M. Tierney, Nicholas Alexander, Stephanie Mellor, Niall Holmes, Robert Seymour, George C. O'Neill, Eleanor A. Maguire, Gareth R. Barnes   +7 more
doaj   +1 more source

High Sensitivity Optically Pumped Quantum Magnetometer [PDF]

The Scientific World Journal, 2013
Quantum magnetometers based on optical pumping can achieve sensitivity as high as what SQUID‐based devices can attain. In this paper, we discuss the principle of operation and the optimal design of an optically pumped quantum magnetometer. The ultimate intrinsic sensitivity is calculated showing that optimal performance of the magnetometer is attained ...
Tiporlini, Valentina, Alameh, Kamal
openaire   +4 more sources

Optically pumped magnetometers reveal fasciculations non-invasively

Clinical Neurophysiology, 2021
This proof-of-principle-study evaluated the extent to which spontaneous activity (SA) of the muscle can be detected via non-invasive magnetomyography (MMG) with optically pumped magnetometers (OPM).Five patients, who together exhibited all forms of SA (fibrillations, positive sharp waves, fasciculations, myotonic discharges, complex-repetitive ...
Justus Marquetand, Thomas Middelmann, Juergen Dax, Sangyeob Baek, Davide Sometti, Alexander Grimm, Holger Lerche, Pascal Martin, Cornelius Kronlage, Markus Siegel, Christoph Braun, Philip Broser   +11 more
openaire   +3 more sources

Demonstration of magnetically silent optically pumped magnetometers for the TUCAN electric dipole moment experiment. [PDF]

Eur Phys J C Part Fields
We report the performance of a magnetically silent optically pumped cesium magnetometer with a statistical sensitivity of 3.5 pT/Hz\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb ...
Klassen W, Ahmed S, Grehan KP, Hovde C, Madison KW, Mammei RR, Martin JW, McCrea M, Mohammadi T, Momose T, Opsahl P, Ostapchuk DCM.   +11 more
europepmc   +3 more sources

On-Scalp Optically Pumped Magnetometers versus Cryogenic Magnetoencephalography for Diagnostic Evaluation of Epilepsy in School-aged Children.

Radiology, 2022
Background Magnetoencephalography (MEG) is an established method used to detect and localize focal interictal epileptiform discharges (IEDs). Current MEG systems house hundreds of cryogenic sensors in a rigid, one-size-fits-all helmet, which results in ...
O. Feys, P. Corvilain, A. Aeby, C. Sculier, N. Holmes, M. Brookes, S. Goldman, V. Wens, X. De Tiège   +8 more
semanticscholar   +1 more source

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, Elena Boto, Niall Holmes, Ryan M. Hill, Richard Bowtell, Vincent Wens, Xavier De Tiège, Matthew J. Brookes, Mathieu Bourguignon   +8 more
doaj   +1 more source

Software program development of a high-precision magnetometer system for human-occupied vehicles [PDF]

Geoscientific Instrumentation, Methods and Data Systems
Cesium optically pumped magnetometers are widely used in geophysical exploration, environmental monitoring, and scientific research for magnetic field measurements.
Q. Zhang, Q. Zhang, K. Zhou, M. Deng, L. Huang, C. Li, Q. Zhang   +6 more
doaj   +1 more source