Results 21 to 30 of about 3,275 (185)
Vector magnetocardiography using compact optically-pumped magnetometers
Heliyon, 2023 Optically pumped magnetometers can provide functionality for bio-magnetic field detection and mapping. This has attracted widespread attention from researchers in the biomedical science field. Magnetocardiography has been proven to be an effective method for examining heart disease.
Shengran Su +10 more
openaire +3 more sources
A High-Sensitivity Cesium Atomic Magnetometer Based on A Cesium Spectral Lamp
Applied Sciences, 2023 Based on a low-noise cesium spectral lamp, a high-sensitivity self-oscillating cesium atomic magnetometer with a wide operating temperature range has been developed, solving problems with existing sensors such as a limited operating temperature range and
Yuan-Tian Lu +7 more
doaj +1 more source
How to build a magnetometer with thermal atomic vapor: a tutorial
New Journal of Physics, 2023 This article is designed as a step-by-step guide to optically pumped magnetometers based on alkali atomic vapor cells. We begin with a general introduction to atomic magneto-optical response, as well as expected magnetometer performance merits and how ...
Anne Fabricant +2 more
doaj +1 more source
Sensors, 2023 The signal space separation (SSS) method is routinely employed in the analysis of multichannel magnetic field recordings (such as magnetoencephalography (MEG) data).
Niall Holmes +3 more
doaj +1 more source
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 +11 more
openaire +3 more sources
Moving Wearable Magnetoencephalography Measurement Study Based on Optically-pumped Magnetometer
Chinese Journal of Magnetic Resonance, 2022 Magnetoencephalography is a non-invasive technology for brain function imaging, which is of enormous value to brain science research and clinical application due to its ultra-high temporal and spatial trace resolution.
Chun-qiao CHEN +7 more
doaj +1 more source
AIP Advances, 2020 The optical light shift effect is an all-optical technique to create magnetic bias fields to determine the vector components of the magnetic field using a scalar optically pumped magnetometer.
Janet W. Lou, Geoffrey A. Cranch
doaj +1 more source
Biomagnetism: The First Sixty Years
Sensors, 2023 Biomagnetism is the measurement of the weak magnetic fields produced by nerves and muscle. The magnetic field of the heart—the magnetocardiogram (MCG)—is the largest biomagnetic signal generated by the body and was the first measured.
Bradley J. Roth
doaj +1 more source
VCSEL frequency stabilization for optically pumped magnetometers [PDF]
Chinese Optics Letters, 2021 Optically pumped magnetometers (OPMs) have developed rapidly in the bio-magnetic measurement field, which requires lasers with stable frequency and intensity for high sensitivity. Herein we stabilize a vertical-cavity surface-emitting laser (VCSEL) without any additional setup except for the parts of an OPM.
Yeguang Yan +5 more
openaire +1 more source
A sound card based multi-channel frequency measurement system [PDF]
, 2005 For physical processes which express themselves as a frequency, for example magnetic field measurements using optically-pumped alkali-vapor magnetometers, the precise extraction of the frequency from the noisy signal is a classical problem.
Bison, G. +3 more
core +2 more sources