Dear expert.

Hi. I'm a newbie using Freesurfer software, and I want to transform the data of .trk file which is from Trackvis tool. (https://surfer.nmr.mgh.harvard.edu/fswiki/FreeSurferTrackVisTransforms)

As there is an information for transforming trk file into the space of Freesurfer surface, I read it several times but I couldn't implement it on Linux console. 

The problem is that I cannot understand how to 'load the trk data from a file' to use the header data such as voxel_size.

I also read TrackVis file format (at http://trackvis.org/docs/?subsect=fileformat), and read other mails sent from others, but couldn't solve the problem.

Could you give me a specific steps to solve this?

Many thanks

Jack.