Results 41 to 50 of about 816 (174)

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

An Iterative Implementation of the Signal Space Separation Method for Magnetoencephalography Systems with Low Channel Counts [PDF]

, 2023
The signal space separation (SSS) method is routinely employed in the analysis of multichannel magnetic field recordings (such as magnetoencephalography (MEG) data).
Bowtell, Richard, Brookes, Matthew J, Holmes, Niall, Taulu, Samu   +3 more
core   +2 more sources

An integration of autonomic computing with multicore systems for performance optimization in Industrial Internet of Things

IET Communications, EarlyView., 2022
Abstract The goal of this work is to investigate how the self‐awareness characteristic of autonomic computing, paired with existing performance optimization rules, may be used in applications to minimise multi‐core processor performance concerns. The suggested self‐awareness technique can assist applications in self‐execution while also assisting other
Surendra Kumar Shukla, Bhaskar Pant, Wattana Viriyasitavat, Devvret Verma, Sandeep Kautish, Gaurav Dhiman, Amandeep Kaur, Kannan Srihari, Sachi Nandan Mohanty   +8 more
wiley   +1 more source

Interference suppression techniques for OPM-based MEG: Opportunities and challenges

NeuroImage, 2022
One of the primary technical challenges facing magnetoencephalography (MEG) is that the magnitude of neuromagnetic fields is several orders of magnitude lower than interfering signals.
Robert A. Seymour, Nicholas Alexander, Stephanie Mellor, George C. O'Neill, Tim M. Tierney, Gareth R. Barnes, Eleanor A. Maguire   +6 more
doaj   +1 more source

Simultaneous whole-head electrophysiological recordings using EEG and OPM-MEG. [PDF]

Imaging Neurosci (Camb)
Abstract Electroencephalography (EEG) and magnetoencephalography (MEG) non-invasively measure human brain electrophysiology. They differ in nature; MEG offers better performance while EEG (a wearable platform) is more practical. They are also complementary, with studies showing that concurrent MEG/EEG provides advantages over either ...
Seedat ZA, Pier KS, Holmes N, Rea M, Al-Hilaly L, Tierney TM, Embury CM, Pardington R, Mullinger KJ, Cross JH, Boto E, Brookes MJ.   +11 more
europepmc   +3 more sources

Measuring the cortical tracking of speech with optically-pumped magnetometers [PDF]

, 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).
Boto, Elena, Bourguignon, Mathieu, Bowtell, Richard, Brookes, Matthew J., de Lange, Paul, De Tiège, Xavier, Hill, Ryan M., Holmes, Niall, Wens, Vincent   +8 more
core   +2 more sources

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

Simultaneous whole-head electrophysiological recordings using EEG and OPM-MEG

, 2023
ABSTRACTElectroencephalography (EEG) and magnetoencephalography (MEG) non-invasively measure human brain electrophysiology. They differ in nature; MEG offers better performance (higher spatial precision) whilst EEG (a wearable platform) is more practical. They are also complementary, with studies showing that concurrent MEG/EEG provides advantages over
Seedat ZA, Pier KS, Holmes N, Rea M, Al-Hilaly L, Tierney TM, Pardington R, Mullinger KJ, Cross JH, Boto E, Brookes MJ.   +10 more
europepmc   +2 more sources

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

Spatial and Frequency Specific Artifact Reduction in Optically Pumped Magnetometer Recordings

Journal of Integrative Neuroscience, 2022
Background: Magnetoencephalography (MEG) based on optically pumped magnetometers (OPMs) opens up new opportunities for brain research. However, OPM recordings are associated with artifacts.
Jing Xiang, Han Tong, Yang Jiang, Maria E. Barnes-Davis   +3 more
doaj   +1 more source