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Neuroscan is pleased to announce the patented MagLink
system for integrated EEG and ERP recordings inside the fMRI.
This second-generation system improves on the original Opti-Link
system by increasing the bandwidth and eliminated the pre-amplifier
and optical coupling. The passive MagLink system provides the
ability to record during the pulse sequence without compromising the
raw EEG data. MagLink in conjunction with Neuroscan
amplifiers has successfully recorded EEG data through the pulse
sequence in up to 4 Tesla MRI scanners. SCAN & TOOLBOX 2003 provide
powerful new features for on-line and off-line reduction and removal
of the ballistocardiogram and pulse sequence artifact while
retaining the integrity of the EEG. Post-processing tools allow
ERP's to be extracted which can then be subjected to source
localization and compared with the fMRI.
The patented** fMRI compatible electrode and electrode placement
technique employing a carbon fiber technology ensures that the
MagLink has negligable impact on MR signal quality, enabling the
simultaneous acquistion of uncompromised fMRI and EEG data.
The gradient artifact that is injected into the EEG data can be
reduced by a number of different strategies that are included in the
SCAN
software. Having a variety of data processing methods available
is critical to account for the different artifacts that are
encountered. The individual artifact signatures vary based on the
type of pulse sequence, magnet type and strength, the electrode
impedance, even the quality of the shim on a particular day.
Neuroscan"s correction methods can correct the EEG data under a
variety of parameters.
The complete MagLink system consists of MagLink
Cables, MagLink Caps, a Neuroscan amplifier and the
SCAN
software. This fully functional system has acquired EEG and fMRI
data successful in the following magnets:
GE Signa 1.5 Tesla
GE Signa 3.0 Tesla
Siemens 1.5 Tesla
Siemens 3.0 Tesla
Philips 1.5 Tesla
Varian 4.0 Tesla
- ** U.S.
Patent 6,708,051 B1: Filed 11/10/99, Issued: 16/03/04
- ** U.S.
Patent 5,445,162 C1: Filed 08/27/93, Issued: 08/29/95,
Recertification Issued 11/30/04
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