Hi Doug

Thanks for your reply. They are talairach coordinates as it is mentioned in that paper. How may I convert the talairach to RAS?

Thanks MOna

Zahra (Mona) Nasiriavanaki, M.D. Postdoctoral Research Fellow Department of Psychiatry Massachusetts General Hospital 149 13th Street, 149-2615 Boston, MA, USA, 02129

On Feb 26, 2021, at 8:48 AM, Douglas N. Greve <dgreve@mgh.harvard.edumailto:dgreve@mgh.harvard.edu> wrote:

Is the point truly talairach or is it mni152 or mni305. If 152 or 305, then this page will tell you how to do the conversion https://surfer.nmr.mgh.harvard.edu/fswiki/CoordinateSystems

On 2/24/2021 3:26 PM, Nasiriavanaki, Zahra wrote: Hi Freesurferers

I have some talairach coordinates on the cortical surface (extracted from a paper) and I need to see their location on my fmri maps.

I used "tksurfer> go to saved point “ to see the location of that coordinate on my map. However, that coordinate is in talairach. Should I convert it to RAS and then save it as a point in tmp folder? If so, could you please let me know how I should convert them from talairach to RAS?

Thanks MOna

Zahra (Mona) Nasiriavanaki, M.D. Postdoctoral Research Fellow Department of Psychiatry Massachusetts General Hospital 149 13th Street, 149-2615 Boston, MA, USA, 02129

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You can use this transform to go from talairach to mni305 http://www.mrc-cbu.cam.ac.uk/Imaging/mnispace.html You can then reverse case #2 here https://surfer.nmr.mgh.harvard.edu/fswiki/CoordinateSystems to go from MNI305 to individual RAS

On 2/26/2021 10:24 AM, Nasiriavanaki, Zahra wrote:

Hi Doug

Thanks for your reply. They are talairach coordinates as it is mentioned in that paper. How may I convert the talairach to RAS?

Thanks MOna

*Zahra (Mona) Nasiriavanaki, M.D.* Postdoctoral Research Fellow Department of Psychiatry Massachusetts General Hospital 149 13th Street, 149-2615 Boston, MA, USA, 02129

...

On Feb 26, 2021, at 8:48 AM, Douglas N. Greve <dgreve@mgh.harvard.edu mailto:dgreve@mgh.harvard.edu> wrote:

Is the point truly talairach or is it mni152 or mni305. If 152 or 305, then this page will tell you how to do the conversion https://surfer.nmr.mgh.harvard.edu/fswiki/CoordinateSystems

On 2/24/2021 3:26 PM, Nasiriavanaki, Zahra wrote:

...

Hi Freesurferers

I have some talairach coordinates on the cortical surface (extracted from a paper) and I need to see their location on my fmri maps.

I used "tksurfer> go to saved point “ to see the location of that coordinate on my map. However, that coordinate is in talairach. Should I convert it to RAS and then save it as a point in tmp folder? If so, could you please let me know how I should convert them from talairach to RAS?

Thanks MOna

*Zahra (Mona) Nasiriavanaki, M.D.* Postdoctoral Research Fellow Department of Psychiatry Massachusetts General Hospital 149 13th Street, 149-2615 Boston, MA, USA, 02129

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