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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