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Dear FreeSurfer experts:
I use the 'qcache' command to get the file
'$SUBJECTS_DIR/subjectname/surf/?h.thickness.fwhm10.fsaverage.mgh'.
Now,I have known that cortical thickness in this file is in standard space.But
I don't understand why it is an average of 40 subjects.
Is it not CT measures an individual in standard space?
I can get cortical thickness in each vertice by reading this file in matlab.
And I know mean CT is computed by dividing sum CT of all ROI vertices by the
number of ROI vertices.
Is there any way I can get individual ROI in standard space if I want to
compute mean CT measures of each ROI?
or Can I use file '$SUBJECTS_DIR/fsaverage/label/?.annot' as atlas directly?
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