On 8/14/15 10:15 AM, chenhf_uestc wrote:
Dear freesurfer experts,
The freesurfer online manual stated that before group analysis, we
should*resample data* onto the*common space (fsaverage)*. I have three
questions here. First, Is the fsaverage file in the MNI space?
There is no such thing as "MNI Space". There is MNI152 and MNI305.
fsaverage is in MNI305
In some previous studies, they report significant clusters with MNI
coordinates. So, I would like to know whether this "common space" is
equal to MNI space.
No
Second, what does resample mean?
To convert the measurements in one space/grid to that of another space/grid.
Normalization--register the surf data to the fsaverage space?
That is one example.
In my experience, I just used resample to change the voxel size in the
volume data (e.g., before 1*1*1, after 3*3*3). The final question is
that the fsaverage file is generated from my data or just a prior
template?
which file? fsaverage is not generated from your data
doug
Thanks in advance.
Best,
Feng
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