Hi, all

 

I want to do probtrackx from a seed region in MNI space, but I wondered how to get the inverse transformation from MNI space to native diffusion space.

From diffusion to MNI space, I implemented following steps:

 

flirt -ref b3D -in nodif_brain -dof 7 -omat dti2str.mat
flirt -ref ${FSLDIR}/data/standard/MNI152_T1_2mm_brain -in b3D -omat affine_transf.mat
fnirt --in=b3D --aff=affine_transf.mat --cout=nonlinear_transf --config=T1_2_MNI152_2mm
applywarp --ref=${FSLDIR}/data/standard/MNI152_T1_2mm_brain --in=nodif_brain --warp=nonlinear_transf --premat=dti2str.mat --out=dti_MNI

 

PS: b3D is the betted T1 image, and nodif_brain is the betted b0 image.

 

However, when do probtrackx, it need to select a Seed to Diffusion Transform.

How to get a inverse transform of the above tranformations steps?

Thanks in advance!

 

Andy