What is MEG?
A Magnetoencephalography (MEG) system is a device which measures the tiny
magnetic fields created by the electric current flowing within the neurons of
the brain. It can identify activity associated with various human functions in
real time, with millimeter spatial accuracy. The exquisite sensitivity of the
MEG sensors is achieved by utilizing the world's most sensitive detectors of
magnetic fields, SQUIDs (Superconducting Quantum Interference Devices).
The first MEG system using a shielded room was operated at the Francis Bitter
Magnetic Laboratory at MIT for many years. It was under the direction of group
leader David Cohen, the inventor of the field of magnetoencephalography.
Dr. Cohen first measured the magnetoencephalogram in 1968.
Today MEG is considered to be a revolutionary imaging technology that provides
unprecedented insight into the workings of the human brain through the
measurement of electromagnetic activity. It is completely non-invasive and
silent.
Clinically, it can be used to positively impact patient outcomes, providing
clinicians with the invaluable information they need to evaluate neurological
disorders and plan surgical treatments.
Our CTF MEG systems are the most technologically advanced instruments available
in the world today, offering MEG sensor arrays of up to 275 distinct sensor
channels with up to 128 simultaneous EEG sensors. Click here to learn
more.
Proprietary Noise
Cancellation Technology
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Ultra-sensitive
Detection Capability
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Patient Comfort
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Sophisticated
Digital Electronics
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Powerful, Flexible
Software
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Advanced
Visualization and Analysis
VSM's MEG software offers ease-of-use for clinically-oriented operation while
simultaneously retaining robust functionality, flexibility, and sophisticated
analytical tools for the most demanding research applications.
Control of the MEG system for tuning, calibration and acquisition is automated
through the advanced software systems. Data processing, including several types
of filtering, noise cancellation and baseline removal, is available in the
analysis package. Common functions such as data review, editing and averaging,
along with a variety of display types for examining data, are easily accessible
for complete flexibility.
Scripting and user definable setup files for the above tasks are available for
convenient and automated MEG/EEG data analysis. All analysis techniques allow
integration of MEG data with MRI to provide functional/anatomical brain images.
A number of data formats, including DICOM, are supported for data
import/export.
Synthetic Aperture Magnetometry (SAM), commercially exclusive to VSM, is one of
the most advanced forms of MEG data analysis available. SAM facilitates the
most complex studies of brain function, including:
- Probability current
density mapping.
- Time display of an
arbitrary number of virtual depth electrodes.
- Statistical
parametric mapping.
- Activity 'movies'
and differentiating between cognitive states.
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