Results 11 to 20 of about 2,829 (158)
Modulation of Visual Contrast Perception Associated With Dorsal Attention Network Connectivity Assessed by Magnetoencephalography. [PDF]
Hum Brain MappMagnetoencephalography was used to identify the impact of spatial attention on primary visual cortical responses to stimuli of varying contrast levels. Enhancement of the maximal response of the visual cortex to high contrast stimuli was associated with synchronous communication between the dorsal attention network and visual cortex within the alpha ...
Sklar AL +8 more
europepmc +2 more sources
Improved measurement surface for MEG using magnetic-dipole sources and a spherical-multipole expansion [PDF]
Advances in Radio Science, 2012 The multipole representation of Magnetoencephalography (MEG) signals is known as a useful tool for distinguishing between magnetic fields arising from the brain and external disturbances. In this contribution we extend this concept and show that a closed
F. Argin, H. Ahrens, L. Klinkenbusch
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Choice of Magnetometers and Gradiometers after Signal Space Separation
Sensors, 2017 Background: Modern Elekta Neuromag MEG devices include 102 sensor triplets containing one magnetometer and two planar gradiometers. The first processing step is often a signal space separation (SSS), which provides a powerful noise reduction.
Pilar Garcés +3 more
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OPM Gradiometer for Magnetorelaxometry
, 2022 Magnetic nanoparticle (MNP) applications in biomedicine require the MNPs characterization, quantification, and spatial distribution determination. These are tasks that can be performed by magnetorelaxometry (MRX). Until recently, SQUIDs were the most commonly used sensors to detect MRX signals.
Prospero, A. +2 more
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A unified view on beamformers for M/EEG source reconstruction
NeuroImage, 2022 Beamforming is a popular method for functional source reconstruction using magnetoencephalography (MEG) and electroencephalography (EEG) data. Beamformers, which were first proposed for MEG more than two decades ago, have since been applied in hundreds ...
Britta U. Westner +6 more
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IEEE Transactions on Applied Superconductivity, 2006 We present methods to compute the imbalance in a gradiometer of arbitrary shape due to imperfections in its geometry, eddy currents induced in the radio-frequency interference shield, and screening currents induced in the modules of the superconducting quantum interference devices (SQUIDs). As an example, the methods are applied to evaluate the maximum
Uzunbajakau, S.A. +3 more
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Towards constraining parity-violations in gravity with satellite gradiometry
Physics Letters B, 2019 Parity violation in gravity, if existed, could have important implications, and it is meaningful to search and test the possible observational effects.
Peng Xu, Zhi Wang, Li-E Qiang
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European Physical Journal C: Particles and Fields, 2018 With continuous advances in related technologies, precision tests of modern gravitational theories with orbiting gradiometers becomes feasible, which may naturally be incorporated into future satellite gravity missions.
Peng Xu, Li-E. Qiang
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STAGES OF DEVELOPMENT AND STATE OF ENGINEERING OF GRAVITY GRADIOMETERS FOR MOVING OBJECTS. (Review)
Приборы и методы измерений, 2016 The main steps of creating the gravity gradiometers for the measurement of inhomogineasly of gravitational fields on different mobile carriers, including in conditions of space, are considered on the basis of the analysis of the open literature. The role
I. Z. Gilavdary, N. N. Riznookaya
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New Matching Method for Accelerometers in Gravity Gradiometer
Sensors, 2017 The gravity gradiometer is widely used in mineral prospecting, including in the exploration of mineral, oil and gas deposits. The mismatch of accelerometers adversely affects the measuring precision of rotating accelerometer-based gravity gradiometers ...
Hongwei Wei, Meiping Wu, Juliang Cao
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