I¹d note that you can run the group ICA on surface data in surface space
pretty easily using melodic, which would avoid the issue that Doug mentions.
Peace,
Matt.
From: <freesurfer-boun...@nmr.mgh.harvard.edu> on behalf of Douglas Greve
<gr...@nmr.mgh.harvard.edu>
Reply-To: Freesurfer support list <freesurfer@nmr.mgh.harvard.edu>
Date: Monday, October 9, 2017 at 7:20 PM
To: <freesurfer@nmr.mgh.harvard.edu>
Subject: Re: [Freesurfer] Transformation between spaces
How did you get your ICA analysis into MNI305 (or MNI152) space? You're ICA
intergroup comparisons will only be as good as that space -- how you get it
onto the surface from there is not so important. You can run recon-all on
the MNI152, sample the ICA maps onto the surface, then use the surface-based
registration to map it to fsaverage.
On 10/9/17 7:20 PM, Florence Campana wrote:
>
> Dear freesurfer experts,
>
>
>
> I ran a spatial ICA in volume and would like to visualize the components in
> surface in order to assess the overlap between the independent components and
> my ROI (defined on surface). However after reading this paper,
> https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2862732/, I am concerned with
> transformations between the MNI 305 space and the surface space without
> totally understanding the nature of the distortions unfortunately. Would you
> mind explaining it briefly to me and let me know whether you think that the
> transformation of the components from the MNI305 space to the surface will
> lead to distorted results in the case of our spatial overlap estimates? (in
> which case I can define the ROI in volume and conduct all the analyses in
> volume).
>
>
>
>
> Thank you very much,
>
> Florence Campana
>
>
>
>
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> Freesurfer mailing list
> freesur...@nmr.mgh.harvard.eduhttps://mail.nmr.mgh.harvard.edu/mailman/listinf
> o/freesurfer
>
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