[Freesurfer] Registration of DIR (Double Inversion Recovery) series

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Hi all,

I want to register DIR (Double Inversion Recovery) series to T1 series using Freesurfer. I used the command line similar to that used for FLAIR registration:

bbregister --s subject001 --mov dicom/subject001/20141003_MR/3_Sag_Space_DIR/2.25.97015757385982906453797720915266163627.dcm --lta subjects/subject001/mri/transforms/DirTest.auto.lta --init-coreg --T2

where the option --T2 is still used. Since in DIR series, gray matter is brighter than white matter, I use --T2 as the contrast argument.

I wan's able to check how precise the results are. I will take some time to do check that.

But anyone can tell me: Did I do it correctly? what is the better way or correct way to do the above-mentioned registration?

Thank you! Xiaojiang