On 2/3/2020 11:56 PM, Soo-Jong Kim wrote:
External Email - Use Caution
Thank you, Dr. Greve
I checked all about your comment.
I have questions more.
1. I found that volumes or counts in gtm.stats.dat are for native PET
space.
If co-registered PET onto corresponding MRI(i.e. MRI space) is
available using rbv.nii.gz from mri_gtmpvc,
Or if you recommend it by gtm.stats.dat, I can use gtm.stats.dat
--rescale (reference regions) for SUVR in PET space.
What do you prefer or recommend?
I'm not sure why you would use the ROI volume from the PET analysis at
all. Why not just use the data in the aseg.stats or the ?h.aparc.stats?
2. I used mri_vol2vol --mov rbv.nii.gz --targ original_PET.nii --o
test.nii --regheader
because rbv.nii.gz is in different space.
but when overlaid with them, registration is not correct. (WHY)
rbv.nii.gz is in different space, even not in T1.mgz space. (DKT space)
I just checked, and the RBV is in the anatomical space and so
--regheader is not appropriate. if you really want to map it back to the
pet space, you will need to supply a registration file, but there is
probably no reason to do this.
I just wanted to use the pv-corrected image for image processing.
and you also said, smoothing is required after PVC. (Surface or volume
based smoothing (resonable).
Best regards,
S
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