Hi

Can you please help me to recover RAS voxel coordinates (I need to use them in the  label file) from the talairach ones.

I think that the transformation I should use is the one in Talairach.xfm (T), but If I  copy one vertex coordinates P (MNI Tal) from tksurfer, apply the transformation: I don’t  have the coordinate of the same RAS vertex.

Ps:I tried to add 0 0 0 1 to the transform to make it 4x4, and 1 to the point to make it 4x1

Please correct me if the transformation and the displayed values in Tksurfer are not related to the Subject transformation in Talaraich space.

Thanks a lot  

Leila