External Email - Use Caution Hello,
I am trying to understand some code I came across and am having trouble understanding the difference between the target surface in mri_surf2surf and the surface used as target for the registration. The code first uses freesurfer_registerXhem register the subject's right hemisphere to the left and register both hemispheres to fsaverage_sym, producing the registration file fsaverage_sym.sphere.reg. I then use the following command: mri_surf2surf --srcsubject $subj --hemi lh --trgsubject ico --trgicoorder 7 --surfreg fsaverage_sym.sphere.reg --srcsurfval temp.curv --src_type curv --trgsurfval tempN.curv --trg_type curv --mapmethod nnf --nsmooth-out 1 to resample the registered subject surface to ico7. To my understanding, ico7 is exactly the same as fsaverage, but fsaverage is not exactly the same as fsaverage_sym. So I find it strange that the code is using a registration file which is registered to one surface (fsaverage_sym) with a different target surface (fsaverage). I'm not sure which space the result will actually be in - fsaverage or fsaverage_sym? I'm obviously missing something basic here. Thanks very much for the help! Alon
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