How can I get the source data after doing source estimation

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Hello,

Can I get the source data file (after doing the inverse problem on EEG)?

For example, how can I get the source data corresponding to EEG signal data (e.g. in numpy or mat format) on the epilepsy tutorial not only visualizing the source? https://neuroimage.usc.edu/brainstorm/Tutorials/Epilepsy#DatasetEpilepsy.License

Best regards,
Jaeun

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Hi Jaeun,

Do you mean the vertices X time matrix filled with the activation values at a vertex at a certain time point? In that case you can, after doing the source localization, export the data to matlab or a file like this (where Export as 4D matrix is arbitrarily selected) :

image
image544×797 45 KB

Kind regards,
Steven

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The files are available as .mat files in the brainstorm database, you can read these files in Matlab or Python.

The section "On the hard drive" of the introduction tutorial on source estimation explains how the data is stored and how to read it from a Matlab script:
https://neuroimage.usc.edu/brainstorm/Tutorials/SourceEstimation#On_the_hard_drive

If you want full time series instead of the optimized storage (imaging kernel), select the option "Full results":
https://neuroimage.usc.edu/brainstorm/Tutorials/SourceEstimation#Output_mode

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Thanks for your help!

Best regards,
Jaeun