Dear AFNI experts,
I extracted some masks of my interest from the DD_Desai_MPM (TT_desai_DD_MPM+tlrc) atlas, but my functional data were normalized to the MNI152_T1_2009c. Could anyone please let me know if there is a way that I can convert the mask in the mask from the TT space to the MNI152 or do I need to rerun the proc py using TT_152_2009c as a basis? Thank you in advance for your help!
Neither MNI nor Talairach space is not one specific space, but each corresponds to a kind of family of spaces. MNI has about a dozen popular variants. The Desai atlases were made using AFNI’s @auto_tlrc function by alignment to the TT_N27 space. Consequently, the atlas is the TT_N27 variant of Talairach space.
Consider the following options to transform data or coordinates between MNI and Talairach spaces :
- Affine, 2-piece affine and 12-piece affine transformations to go from generic Talairach to generic MNI.
- 12-piece affine to go from TT_N27 to MNI_N27, and MNI_N27 to TT_N27.
https://afni.nimh.nih.gov/afni/community/board/read.php?1,157350,157357#msg-157357 (same as in #1)
- Affine+nonlinear warp to go from TT_N27 to MNI_2009c
- Use FreeSurfer parcellations for MNI_2009c instead of Desai atlases. See aparc+aseg+REN_all.nii.gz in compressed file below.
Thank you so much for the instruction. I’ll try one of those.