EEG and ERP recordings inside the fMRI:
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Overview
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.
Newsletters
Neuroscan News – Issue 2, can be viewed here
Specification
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
Benefits
The most recent development affecting gradient artifact reduction derives from the ability to synchronize the clocks between the amplifiers and the MRI Scanner. Clock synchronization improves the accuracy of gradient artifact reduction, simplifies the artifact reduction process and allows acquisition using standard sampling rates (e.g., 500 Hz), click HERE for more information about clock synchronization.View Maglink PDF Brochure here
Material
Scientific Publications with Neuroscan Equipment
In past years, we have attempted to maintain a list of publications in which Neuroscan equipment was used. The sheer number of publications has greatly surpassed our ability to keep the list current. As a convenient alternative, we are providing the following links to articles in which Neuroscan is mentioned. The searches were accomplished using Google Scholar, going back to 2006, using the indicated search words. The numbers in parentheses are the total “matches” that were returned at the time the search was created.
MRI/EEG Recordings
Neuroscan and Curry (117)
Neuroscan and “source reconstruction” (61)
Neuroscan and MRI (534)
