A 20-Channel Magnetoencephalography System Based on Optically Pumped Magnetometers
| Autor: | Jim McKay, Michael P. Weisend, Amir Borna, Yuan-Yu Jau, Anthony P. Colombo, T. R. Carter, Peter D. D. Schwindt, Christopher W. Berry, Julia M. Stephen, Josh D Goldberg |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Adult
Male Physics - Instrumentation and Detectors Optical Phenomena Magnetometer Magnetometry FOS: Physical sciences 01 natural sciences Article law.invention 03 medical and health sciences 0302 clinical medicine Optics Data acquisition law 0103 physical sciences medicine Humans Radiology Nuclear Medicine and imaging 010302 applied physics Physics Radiological and Ultrasound Technology medicine.diagnostic_test business.industry Brain Magnetoencephalography Instrumentation and Detectors (physics.ins-det) Laser Physics - Medical Physics Magnetic field SQUID Optical phenomena Magnetic Fields Medical Physics (physics.med-ph) business 030217 neurology & neurosurgery Communication channel |
| Popis: | We describe a multichannel magnetoencephalography (MEG) system that uses optically pumped magnetometers (OPMs) to sense the magnetic fields of the human brain. The system consists of an array of 20 OPM channels conforming to the human subject’s head, a person-sized magnetic shield containing the array and the human subject, a laser system to drive the OPM array, and various control and data acquisitions systems. We conducted two MEG experiments: auditory evoked magnetic field (AEF) and somatosensory evoked magnetic field (SEF), on three healthy male subjects, using both our OPM array and a 306-channel Elekta-Neuromag superconducting quantum interference device (SQUID) MEG system. The described OPM array measures the tangential components of the magnetic field as opposed to the radial component measured by most SQUID-based MEG systems. Herein, we compare the results of the OPM- and SQUID-based MEG systems on the auditory and somatosensory data recorded in the same individuals on both systems. |
| Databáze: | OpenAIRE |
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