Do you mean the matrix? You can get a freesurfer matrix with this: cd subject/mri tkregister2 --mov orig/001.mgz --s subject --regheader --reg reg.dat --noedit this will produce reg.dat which will be a text file with a registration matrix. Interpreting the matrix is another story. If you want to map to/from the native space, look at mri_vol2vol (which will use reg.dat). If you want to map to/from the surface, see mri_vol2surf. doug Frederick Klauschen wrote: Could you tell me the transformation vector that is used to convert a e.g.(181x217x181) array to a FS (256^3) array. I would like to backtransform from FS to native space.Thanks, Fred --- Doug Greve <[EMAIL PROTECTED]> wrote:Which way do you want to go? Convert FS volumes back into the native space or the other way around? To convert native space vols into FS, run something like: tkregister2 --s subjectname --mov mri/orig/001.mgz --regheader --reg reg.dat This will bring up both the conformed and nonconf volumes, and there should be an exact registration. Once you're confidient of that, you can add --noedit in which case it will simply produce reg.dat without bringing up the gui. Then you can run mri_vol2vol --mov anynativevolume --fstarg --o anynativevolume.inconformedspace.mgz The new volume will be in the conformed (orig.mgz) space. doug Goldman, Aaron (NIH/NIMH) [C] wrote:Hi, I have a few datasets I ran in freesurfer thatwere originally in181x217x181 format. As usual, these were convertedto 256^3 early in theprocess. Basically, I'd like to run some comparisonstats between thefreesurfer volumes and the same subjects run in acouple other programs(that are still 181x217x181), and was wonderingwhat the best way wouldbe to reobtain an exact overlay between the two. Thanks, -Aaron- _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.eduhttps://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer-- Douglas N. Greve, Ph.D. MGH-NMR Center [EMAIL PROTECTED] Phone Number: 617-724-2358 Fax: 617-726-7422 In order to help us help you, please follow the steps in: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.eduhttps://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer__________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- Douglas N. Greve, Ph.D. MGH-NMR Center [EMAIL PROTECTED] Phone Number: 617-724-2358 Fax: 617-726-7422 In order to help us help you, please follow the steps in: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting |
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