[Freesurfer] TrackVis Transforms

[Thomas Potrusil]

Dear FreeSurfers !!

I´m trying to bring a trackvis .trk file to freesurfer space but fail completely...

I tried to execute the code descibed on the following page:

https://surfer.nmr.mgh.harvard.edu/fswiki/FreeSurferTrackVisTransforms

and also read the detailes regarding trk-(header)-data described here:

http://www.trackvis.org/docs/?subsect=fileformat

... but without success !

Can you please provide me an example how to successfully use the following code on my command line:

 trk_verts_crs.xyz = trk_verts.xyz / (trkHeader.voxel_size[0], trkHeader.voxel_size[1], trkHeader.voxel_size[2])


 trk_verts_tkreg = CRS2XYZtkreg * trk_verts_crs

I´m very thankful for your help, thankx a lot,

Thomas

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