If it is tractography, you would want to keep the data in the subject¹s
physical space (either diffusion or structural at the same resolution as
the diffusion). You can then use the --xfm and --invxfm flags to get
standard ROIs to the diffusion data and bring results back into standard
space.
Peace,
Matt.
On 11/18/17, 11:23 AM, "FSL - FMRIB's Software Library on behalf of Enes
Albay" <[log in to unmask] on behalf of [log in to unmask]> wrote:
>Hi,
>
>I want to make group analysis in diffusion data and I want to register my
>difusion data to same space but I could not figure out, how to register
>my raw HARDI diffusion data to standard space. For example, I think that
>first of all, for all subjects, I have to register b0 of each subject to
>T1 of each subject. After, register b0 in T1 to standard MNI space. At
>the end, apply same transformation pattern for all other diffusion
>direction images (there are 64 more direction other than b0). But I am
>not sure whether this is a correct solution or not. Are flirt and fnirt
>suitable for this process? And Is there anything that I have to do for
>bvecs and bvals?
>
>Thanks,
>
>Enes
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