Multi-Channel SQUID System for MEG and Ultra-Low-Field MRI

A seven-channel system capable of performing both magnetoencephalography (MEG) and ultra-low-field magnetic resonance imaging (ULF MRI) is described. The system consists of seven second-order SQUID gradiometers with 37 mm diameter and 60 mm baseline, having magnetic field resolution of 1.2-2.8 fT/rt...

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Bibliographic Details
Published inarXiv.org
Main Authors Zotev, Vadim S, Matlachov, Andrei N, Volegov, Petr L, Sandin, Henrik J, Espy, Michelle A, Mosher, John C, Urbaitis, Algis V, Newman, Shaun G, Kraus, Robert H
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 29.11.2006
Subjects
Coils
Evoked response (psychophysiology)
Gradiometers
Magnetic measurement
Magnetic resonance imaging
Magnetoencephalography
NMR
Nuclear magnetic resonance
Superconducting quantum interference devices
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Summary:A seven-channel system capable of performing both magnetoencephalography (MEG) and ultra-low-field magnetic resonance imaging (ULF MRI) is described. The system consists of seven second-order SQUID gradiometers with 37 mm diameter and 60 mm baseline, having magnetic field resolution of 1.2-2.8 fT/rtHz. It also includes four sets of coils for 2-D Fourier imaging with pre-polarization. The system's MEG performance was demonstrated by measurements of auditory evoked response. The system was also used to obtain a multi-channel 2-D image of a whole human hand at the measurement field of 46 microtesla with 3 by 3 mm resolution.
ISSN:2331-8422
DOI:10.48550/arxiv.0611290