Why did you use --regheader in vol2vol? You will probably need to do a registration (mri_coreg). Did you check the mni152 reg?

On 2/26/19 10:01 AM, john Anderson wrote:

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Dear FS experts,

I would like to move PET image to MNI152. What is the correct command to do so. I tried

mri_vol2vol --mov PET.nii.gz --s subjID --targ $SUBJECTS_DIR/subjID/mri/orig.mga --regheader --o PET_T1.nii.gz

mni152reg --s subjID

then

mri_vol2vol --inv --targ PET_T1.nii.gz --mov $FSL_DIR/data/standard/MNI152_T1_2mm_brain.nii.gz --o PET_T1_2MNI153_2mm.nii.gz --interp nearest --reg $SUBJECTS_DIR/subjID/mri/transforms/reg.mni152.reg.dat

I still not happy with thresults. PET not perfectly moved to MNI.

please are the steps above correct? Can you kindly suggest any ideas to improve PET registration to MNI?

Thanks

John
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