If you have the col row and slice of a voxel, then mni305xyz = X*S*crs where crs = [col row slice 1]' X = matrix from subject/mri/transforms/talairach.xfm S = matrix from "mri_info --vox2ras orig.mgz" Note that these coordinates are for MNI305 space. doug

Tianyi Qian wrote:

Dear Freesurfer experts,

How can I transfer the coordinate in individual space into MNI space. I don't want to transfer the whole volume, I only need to transfer the coordinate of some points.

Thanks,