[Mne_analysis] Beamforming tSSS vs Raw Dataset

[Alexandre Gramfort]

Hi Jeff,

yes it makes sense to estimate the SSP / ICA On tSSS data and to apply them
to non tSSS data.
these are spatial projections.

FYI we are currently rewriting a lot the beamformer code in MNE and doing
extensive validation on tSSS data. We hope this work will be included in
the next release planned now early October.

Alex


On Thu, Sep 14, 2017 at 6:24 PM, Stout, Jeffrey <jstout at mcw.edu> wrote:

> Hi All,
>
>
>
> Our system is a 306 channel Elekta using the maxshield active shielding.
> What is the opinion of the group regarding beamforming on the raw
> unprocessed dataset versus the tSSS processed data.  I have heard that the
> higher rank of the unprocessed data (rank=306) produces better beamforming
> results than tSSS cleaned datasets (rank ~60).  This decision is slightly
> complicated because eyeblink/cardiac cleanup (ICA or SSP) and amplitude
> rejection may not be possible in the RAW datasets that are dominated by
> non-physiological noise.
>
>
>
> I also wanted to see if the SSP or ICA projectors can/cannot be created on
> the tSSS data and applied to the RAW data.  Would this be viable
> mathematically?
>
>
>
> Any input would be greatly appreciated.
>
>
>
> Thank you,
> Jeff Stout
>
>
>
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