External Email - Use Caution Dear Dr. Greve,
Thanks for your prompt response. That's good to know, and indeed I have seen this page. The confusion came because the MNI coordinate I know have an origin at anterior commisure, so the x value should range from neg 90 something, whereas Talairach coordinate x I have seen in Freeview was always positive. What is the exact difference between Talairach (MNI305) coordinates from FreeSurfer and MNI coordinates we see in FSL/SPM/MRIcron? Sincerely, 2020년 5월 4일 (월) 오후 3:07, Douglas N. Greve <dgr...@mgh.harvard.edu>님이 작성: > The "RAS" in that image refers to scanner RAS (not MNI coords). > The "Talarairach" is actually MNI305 (it is called this in version 7 to > avoid this kind of confusion). > > In case you have not seen it, here is a page that may answer more of your > questions. > > https://surfer.nmr.mgh.harvard.edu/fswiki/CoordinateSystems > > > > On 5/4/2020 3:48 PM, Hye Bin Yoo wrote: > > External Email - Use Caution > Dear Freesurfer Developers, > > How are you? We have been using Freesurfer Freeview for localizing > implanted electrodes for human brains, and the coordinate system of choice > was "Talairach". However, we are trying to utilize MNI152 coordinate system > for advanced analyses. How could we transform between the coordinate > systems between Talairach and MNI152 using Freesurfer commands? We do > realize there are formulae available, but we would like to make sure WHAT > coordinates Freeview is actually referring to. > > For your information, please find the attached picture. The red squares > are on RAS and Talairach, and we assume these correspond to MNI305 and > Talairach in MNI space, respectively. Is there an internal formulae we can > utilize to obtain the RAS values given Talairach coordinates only? > > Thank you very much for your help in advance! > > > _______________________________________________ > Freesurfer mailing > listfreesur...@nmr.mgh.harvard.eduhttps://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
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