Source Imaging, minimum numbers of channels

squadussquadus Los Angeles
edited December 2018 in Research
Hello,

I want to perform source imaging to analyze my brain waves and run source localization.

What is the best software + hardware set up to do this?

Comments

  • wjcroftwjcroft Mount Shasta, CA
    Generally this requires a large number of channels, evenly spread across the scalp. QEEG / Loreta neurofeedback uses the 19 channels of the 10-20 map. Research groups typically use more channels: 32, 64, even more. All of these setups require an EEG amplifier that supports the required number of channels, and a headset / cap system that matches.

    I don't have the exact formula off the top of my head, but as the channel count goes down, the spatial resolution drops quickly. Which is the number and size of 'voxels' volume-pixels that are produced by the localization. The 4 channels of the Ganglion will not be enough. Even 8 or 16 channels are way below the numbers normally used. Although 16 might be on the edge.

    Many EEG analysis systems can compute this. The most famous being *Loreta variations. MNE and NeuroPype support localization. Try a search,


    Regards,

    William

  • wjcroftwjcroft Mount Shasta, CA
    edited October 2018
    Section 2.4, Table 1 in this paper has a good summary of localization error distances for various numbers of channels, from 256 all the way down to 16.

    Clinical Neuroscience
    EEG source localization: Sensor density and head surface coverage



    image
  • squadussquadus Los Angeles
    This was very helpful. Thanks!
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