Viewing 5 posts - 1 through 5 (of 5 total)
Viewing 5 posts - 1 through 5 (of 5 total)
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Hi everyone,
I used lead-dbs to do coregistration, normalization and brainshift correction. It has generated lots of files, but I don’t know what the gl- means, like glanat.nii, glpostop_ct.nii, and tp- like tp_rpostop_ct.nii, tp_glpostop_ct.nii and so on.
I didn’t find out them in the manual, is there anyone who knows meanings of them?
Thanks,
Hao
Hi Hao,
As you may already know from the images, ‘gl’ files are normalized image, ‘tp’ means ‘tone mapped’ image and ‘rpostop_ct.nii’ is coregistered image.
Best,
Ningfei
Hi Ningfei,
Thanks for your reply! I still have a question.
During process of coreg. and normalization the program generated a image called tp_glpostop_ct.nii, I wonder whether this should be tp_glRpostop_ct.nii? I see the manual says it first coreg. post-operative image to pre-operative image, and then coreg. to MNI space based the transformation parameters found when coreg. pre-operative to template. The tp_glpostop_ct.nii looks like be coregisterd from postop_ct to MNI space directly. Did I think correctly?
Best,
Hao
Hi Hao,
No, ‘glpostop_ct.nii’ is calculated based on ‘rpostop_ct.nii’. It’s a two-step normalization: ‘postop_ct.nii’ -> ‘rpostop_ct.nii’ (aligned with anat_t1.nii) -> ‘glpostop_ct.nii’ (nomalized to MNI space). Since it’s the normalization of ‘postop_ct.nii’ in the end, I think it make sense to use ‘glpostop_ct.nii’. See in your preference file (Lead-dbs menu -> Preferences -> Edit Preferences File). ‘prefs.ctnii_coregistered’ and ‘prefs.gctnii’ are defined there.
Best,
Ningfei
Thanks! It really helps me a lot!