copy tagset from one dataset to another

AFNI Message Board
1

I have MRIs that have fiducial points marked using the "edit tagset" plugin. I want to copy these points into another dataset that has the exact same geometry.

Why do I want to do this crazy thing? These are anatomical MRIs used for MEG experiments, and the fiducial points are the places where the MEG localization coils were placed during the MEG recording. I want to share the data to a public database, so I need to deface the MRIs. I used @afni_refacer_run, and it works great, but unfortunately the resulting dataset does not preserve the marked points. I want future users of the data to have the points marked already, since obviously we can't share the original MRI or the digital photographs of the face that we used to identify the fiducial points.

1 Like
2

Hi-

I believe there are 3 attributes that are created to store the fiducial tag information, which must be copied over to the header of the new dataset:

  • TAGSET_NUM
  • TAGSET_FLOATS
  • TAGSET_LABELS

3drefit can be used to copy attributes from one dset to another. Since this program overwrites the header, let's make a copy to edit (leaving the original preserved, in case of badness).

So, let's say you have a dataset that has the fiducial tag info in its header (called <dset_with_tag>), and the copied dataset whose header you want to enrich this with info (called <dset_to_get_new_info>). Then, the following should copy over the three attributes from the former to the latter, by specifying the keyword label of each attribute:

3drefit \
    -atrcopy <dset_with_tag> TAGSET_NUM \
    -atrcopy <dset_with_tag> TAGSET_FLOATS \
    -atrcopy <dset_with_tag> TAGSET_LABELS \
    <dset_to_get_new_info>

How does that seem to work?

--pt

1 Like
3

Yes, that worked perfectly. Thank you so much!

1 Like