Displaying raw MEG measurements with FreeSurfer

Sarah M. Rugheimer*, Qiang Liu, Robert J. Sclabassi, Mingui Sun

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contribution


    Magnetoencephalography (MEG) is a non-invasive technique of functional imaging which measures weak magnetic fields in the brain due to the currents generated from neural synapses. MEG systems contain a couple of hundred channels, making it difficult to visualize the raw measurements directly. As an alternative to rendering epileptic data, we demonstrate how MEG measurements can be mapped to a cortical surface by using a software package called FreeSurfer. We fuse MEG data with Magnetic Resonance Image (MRI) by plotting the MEG amplitude on top of the MRI images of gray matter surface. In addition to the surface, we render the MEG intensity in the convoluted regions, e.g. sulci, by computationally "inflating" the brain. These techniques are utilized for experimental study currently, and can be extended for diagnostic purposes in the future.

    Original languageEnglish
    Title of host publicationProceedings of the IEEE 32nd Annual Northeast Bioengineering Conference, 2006
    Number of pages2
    Publication statusPublished - 2006


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