Results 101 to 110 of about 1,280 (179)
Noise Reduction and Localization Accuracy in a Mobile Magnetoencephalography System
SensorsMagnetoencephalography (MEG) non-invasively provides important information about human brain electrophysiology. The growing use of optically pumped magnetometers (OPM) for MEG, as opposed to fixed arrays of cryogenic sensors, has opened the door for ...
Timothy Bardouille +4 more
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Superconducting Quantum Magnetometers for Brain Investigations
SensorsThis review article aims to provide an overview of superconducting magnetic quantum sensors and their applications in the biomedical field, particularly in the neurological field.
Carmela Bonavolontà +3 more
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The application of optically pumped magnetometers (OPMs) to magnetoencephalography (MEG) has been actively studied in recent years. MEG is a non-invasive technique for measuring neural activity in the brain, and due to the recent helium shortage, OPM ...
伊藤, 陽介
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Modeling and Measuring of Light Shift in Optically Pumped Atomic Magnetometers
IEEE Photonics JournalThe light shift is a significant error source of optically pumped atomic magnetometers (OPAMs), requiring accurate calculation or measurement to assess its impact on the accuracy of OPAMs.
Yuntian Zou +6 more
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Stroboscopic microwave spectroscopy of Voigt-based optically pumped magnetometers
We present the results of stroboscopic microwave spectroscopy of a radio-frequency-dressed optically pumped magnetometer. The interaction between radio-frequency-dressed atoms and a synchronously pulsed microwave field followed by Voigt-effect-based ...
Pyragius, Tadas +2 more
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Adaptive multipole models of
Human Brain MappingAbstractMultipole expansions have been used extensively in the Magnetoencephalography (MEG) literature for mitigating environmental interference and modelling brain signal. However, their application to Optically Pumped Magnetometer (OPM) data is challenging due to the wide variety of existing OPM sensor and array designs. We therefore explore how such
Tim M. Tierney +4 more
openaire +3 more sources
An Excitation Circuit of the Cell in Optically Pumped Magnetometer
International Journal of Circuits, Systems and Signal Processing, 2020 Cell is the key component in an optically pumped magnetometer. It is necessary to light the cell before measurement and to maintain the illuminated state. The accuracy and stability of magnetic values from the instrument are closely related to the brightness and stability of the cell.
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Four-channel optically pumped magnetometer for a magnetoencephalography sensor array
Optics ExpressWe present a novel four-channel optically pumped magnetometer (OPM) for magnetoencephalography that utilizes a two-color pump/probe scheme on a single optical axis. We characterize its performance across 18 built sensor modules. The new sensor implements several improvements over our previously developed sensor including lower vapor-cell operating ...
Joonas Iivanainen +8 more
openaire +4 more sources
, 2011 Recently developed ultrasensitive optically pumped atomic magnetometers are promising for biomagnetic measurements such as magnetoencephalograms and magnetocardiograms.
Shuji Taue +2 more
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Source modelling in magnetoencephalography (MEG) infers the spatial origins of electrophysiological signals in the brain. Typically, this requires an anatomical MRI scan of the subject’s head, from which models of the magnetic fields generated by the ...
Hill, Ryan +4 more
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