[FieldTrip] Interpolating atlas and comparing ROIs across subjects

[Parker]

Hello,


I want to compare a handful of ROIs between subjects, so I: 1) did my
source analysis on a subject-specific grid that was inverse-warped to a
template grid 2) used the AAL atlas to interpolate onto my sourcemodel to
have ROIs.


When I interpolated the atlas onto the source model of one of my subjects,
I was able to get a list of indices for the sources that are in my ROIs. I
planned to use those same indices to index sources for every subject, as I
assume those indices point to the same positions in the brain across
subjects.


I was wondering if it is recommended/custom to use that approach when
determining which sources to look in my ROIs, or rather, interpolating the
atlas for each subject individually to determine which sources to look at.


(The reason I ask is because when I index those sources on a different
subject, I notice generally the sources do appear in the same region of the
brain - but some sources, understandably, are in a slightly different
position (ex. Just outside of the headmodel).


Thanks and I appreciate the help
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