[FieldTrip] Running the ICA method to remove EOG/ECG artifact on Neuromag(*.fif) data

[Alexandre Gramfort]

hi Candida,

you should be able to import your fif files into fieldtrip
but be careful when applying ICA on neuromag data as
channels have different types and you have signals
with 2 orders of magnitude difference between gradiometers
and magnetometers.

I am curious to know if fieldtrip handles this properly? and if so how.

Also can Fieldtrip write data back into fif files keeping intact
all the measurement info?

thanks

Alex
-- 
Alexandre Gramfort, PhD
alexandre.gramfort at inria.fr
INRIA Parietal Project Team, NeuroSpin CEA Saclay
Bat. 145, PC 156
91191 Gif-sur-Yvette, France
http://alexandre.gramfort.net

On Thu, Apr 12, 2012 at 7:21 PM, Candida Jane Maria Ustine
<candida at nmr.mgh.harvard.edu> wrote:
> Hello All,
>
> I have just started reading about fieldtrip and I am learning a lot of
> exciting things.
>
> I have MEG data using the neuromag system and I wanted to run the
> Independent Component Analysis on the .fif files to remove the EOG and ECG
> artifact from them. I see that the documentation provided in the
> website(http://fieldtrip.fcdonders.nl/example/use_independent_component_analysis_ica_to_remove_eog_artifacts)
> has resources to handle CTF datasets, and I was wondering if anyone has
> looked into the option of using the .fif files directly.
> Or is there a way to convert the *.fif files to the CTF format as there is
> an MNE utility to do the reverse mne_ctf2fif?
>
> Thanks much for your time and help!
>
> Best,
> Candida
>
>
>
> --
> Candida Jane Maria Ustine
> Martinos Center for Biomedical Imaging
> MGH
> Kuperberg Lab
>
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