Results 41 to 50 of about 96,284 (164)

Investigating the Coherence Between Motor Cortex During Rhythmic Finger Tapping Using OPM-MEG

Photonics
Optically pumped magnetometer OPM-MEG has the potential to replace the traditional low-temperature superconducting quantum interference device SQUID-MEG.
Hao Lu, Yong Li, Yang Gao, Ying Liu, Xiaolin Ning   +4 more
doaj   +2 more sources

Investigating the effects of calibration errors on the spatial resolution of OPM-MEG beamformer imaging

NeuroImage
The use of optically pumped magnetometers (OPMs) has provided a feasible, moveable and wearable alternative to superconducting detectors for magnetoencephalography (MEG) measurements. Recently, the widely used beamformer imaging technique has greatly improved spatial accuracy of MEG in the field of source reconstruction of neuroimaging.
Shengjie Qi, Xinda Song, Le Jia, Zhaoxin Duan, Yan Dai 0016, Jing Zhang 0090, Xiaolin Ning   +6 more
openaire   +4 more sources

Measuring functional connectivity with wearable MEG

NeuroImage, 2021
Optically-pumped magnetometers (OPMs) offer the potential for a step change in magnetoencephalography (MEG) enabling wearable systems that provide improved data quality, accommodate any subject group, allow data capture during movement and potentially ...
Elena Boto, Ryan M. Hill, Molly Rea, Niall Holmes, Zelekha A. Seedat, James Leggett, Vishal Shah, James Osborne, Richard Bowtell, Matthew J. Brookes   +9 more
doaj   +1 more source

Triaxial detection of the neuromagnetic field using optically-pumped magnetometry: feasibility and application in children

NeuroImage, 2022
Optically-pumped magnetometers (OPMs) are an established alternative to superconducting sensors for magnetoencephalography (MEG), offering significant advantages including flexibility to accommodate any head size, uniform coverage, free movement during ...
Elena Boto, Vishal Shah, Ryan M. Hill, Natalie Rhodes, James Osborne, Cody Doyle, Niall Holmes, Molly Rea, James Leggett, Richard Bowtell, Matthew J. Brookes   +10 more
doaj   +1 more source

Cross-Axis projection error in optically pumped magnetometers and its implication for magnetoencephalography systems

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, Joonas Iivanainen, Tony R. Carter, Jim McKay, Samu Taulu, Julia Stephen, Peter D.D. Schwindt   +6 more
doaj   +1 more source

Experimental setup of the SQUID and OPM-MEG systems.

, 2022
(A) Schematic representation of a SQUID-MEG system with a gradiometer array inside a liquid helium Dewar. (B) Dual-axis magnetometers produced by the company QuSpin, and an exemplary CAD model of one sensor holder.
Urban Marhl (11973237), Anna Jodko-Władzińska (11973240), Tilmann Sander (798601), Vojko Jazbinšek (11973243), Rüdiger Brühl (8809013)   +4 more
core   +1 more source

MEG-MRI co-registration.

, 2020
(a) SEF and (b) AEF experiments. The circles pertain to the location of OPM channels. For each MEG experiment the OPM array covers the cortex of interest.
Tony R. Carter (8357562), Samu Taulu (8357577), Peter D. D. Schwindt (8357583), Amir Borna (8357559), Anthony P. Colombo (8357565), Michael Weisend (8357574), Jim McKay (8357571), Yuan-Yu Jau (8357568), Julia M. Stephen (8357580)   +8 more
core   +1 more source

Sensor array design of optically pumped magnetometers for accurately estimating source currents

NeuroImage, 2023
An optically pumped magnetometer (OPM) is a new generation of magnetoencephalography (MEG) devices that is small, light, and works at room temperature. Due to these characteristics, OPMs enable flexible and wearable MEG systems.
Yusuke Takeda, Tomohiro Gomi, Ryu Umebayashi, Sadamu Tomita, Keita Suzuki, Nobuo Hiroe, Jiro Saikawa, Tatsuya Munaka, Okito Yamashita   +8 more
doaj   +1 more source

Performance Analysis of Optically Pumped ⁴He Magnetometers vs. Conventional SQUIDs: From Adult to Infant Head Models

Sensors, 2022
Optically pumped magnetometers (OPMs) are new, room-temperature alternatives to superconducting quantum interference devices (SQUIDs) for measuring the brain’s magnetic fields.
Saeed Zahran, Mahdi Mahmoudzadeh, Fabrice Wallois, Nacim Betrouni, Philippe Derambure, Matthieu Le Prado, Agustin Palacios-Laloy, Etienne Labyt   +7 more
doaj   +1 more source

OPM-MEG reveals dynamics of beta bursts underlying attentional processes in sensory cortex. [PDF]

Sci Rep
Human brain electrophysiology is dominated by rhythmic activity—neural oscillations—which play an important role in coordinating brain function. In the somatosensory cortices, the dominant oscillations occur in the beta (13–30 Hz) band and are thought to
Rivero GR, Tanner Z, Rier L, Hill RM, Shah V, Rea M, Doyle C, Osborne J, Bobela D, Morris PG, Mullinger KJ, Boto E, Holmes N, Brookes MJ.   +13 more
europepmc   +2 more sources