[FieldTrip] Coherent Source Region Suppression - beamformer

[Schoffelen, J.M. (Jan Mathijs)]

Yes, this is implemented in FieldTrip, as per the following publication: https://doi.org/10.1016/j.neuroimage.2008.01.045

The method to use is ‘pcc’ in ft_sourceanalysis. Alternatively, you can handcraft your dipole specific forward models, to include both the ‘leadfield’ for the dipole of interest + the ‘leadfield’ of the to-be-suppressed region. This requires some creative post-processing of the results, but that’s straightforward.

Best wishes,
Jan-Mathijs




On 23 Sep 2020, at 11:26, ⁨נועה הכהן⁩ <⁨noa1hc at gmail.com<mailto:noa1hc at gmail.com>⁩> wrote:

Hello all,
I am working on high dense eeg data, with auditory stimuli. I tried to use dics beamformer in order to localize the gamma waves, but due to the spatial correlation in the signal, I didn't get optimal results (as I understand it..). I read about method that deal with this issue- by using weights for the coherent sources (Modified Beamformers for Coherent Source Region Suppression, Sarang S. Dalal<https://www.ncbi.nlm.nih.gov/pubmed/?term=Dalal%20SS%5BAuthor%5D&cauthor=true&cauthor_uid=16830939> ). Are there any applications of this (or similar) method in fieldtrip?
I will be glad to hear about this issue,
thanks, Noa
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