A CRYOCOOLED 61-CHANNEL MEG SYSTEM

Authors
YOSHIDA T SATA K YOSHII K KANG YM SUZUKI A
Citation
T. Yoshida et al., A CRYOCOOLED 61-CHANNEL MEG SYSTEM, Applied superconductivity, 5(7-12), 1997, pp. 385-392
Citations number
5
Journal title
Applied superconductivity → ACNP
ISSN journal
09641807
Volume
5
Issue
7-12
Year of publication
1997
Pages
385 - 392
Database
ISI
SICI code
0964-1807(1997)5:7-12<385:AC6MS>2.0.ZU;2-M
Abstract
An LTS-SQUID-based MEG system cooled by a GM/JT cryocooler was manufac tured, and its clinical performance was estimated. The system consists of 61 axial gradiometer channels arranged on a spherical surface. The white noise level of the system was below 20 fT/Hz(1/2). The periodic noise induced by the cryocooler could be eliminated by using a digita l noise subtraction process. We measured the somatosensory evoked magn etic field of the human brain. (C) 1998 Elsevier Science Ltd. All righ ts reserved.