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

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

2006-11-29

arxiv.org/abs/physics/0611290v1

IEEETrans.Appl.Supercond.17:839-842,2007

Physics

Medical Physics

To appear in Proceedings of 2006 Applied Superconductivity Conference

Scientific paper

10.1109/TASC.2007.898198

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.

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