It is written that the files are in MNI space ICBM 2009a, which has affine equal to
array([[ 1., 0., 0., -98.],
[ 0., 1., 0., -134.],
[ 0., 0., 1., -72.],
[ 0., 0., 0., 1.]])
However, all the trk files have affine equal to the identity matrix. Is there a reason why you stored in the header of the trk files the identity matrix? This for example prevents their correct visualization in TrackVis.
Another question: the file whole_brain_MNI.trk, besides having the same issue with the affine, has 144678 streamlines. Is it the same whole brain tractogram Yeh is referring to in their paper? In that paper they obtained a tractogram of 550000 streamlines. Or is it maybe the union of the 80 bundles?
Thank you a lot for your help,
best regards,
Giulia