Hi Roberta

we compute but do not apply the talairach transform, so all the volumes, surfaces, ROIs are in subject space, not talairach.

cheers Bruce On Mon, 13 Oct 2014, Roberta Santoro wrote:

Dear list,

I am new to Freesurfer and I have a doubt about the Talairach transformation. As far I understand, the Talairach transformation is applied to compute the surface representations. However, this seems to be a “hidden“ step, i.e. no volume is saved as Talairach transformed. Is this correct? Do the final surfaces (and parcellations) show the brain before or after Talairach transformation? I am asking this because I need to extract ROIs in the original space, i.e. before Talairach transform.

Thanks a lot for your help

Roberta