Dear Gabor,
If you have a T1-weighted image too then just register the FLAIR to the T1 and then combine with the other transformations. If you don't have a T1-weighted image, and the grey-matter to white-matter contrast in the FLAIR is poor (which is common) then you won't be able to use BBR well and you'll have to try alternative registration methods, such as combining FUGUE and FLIRT (assuming you have fieldmaps, otherwise just FLIRT).
All the best,
Mark
On 15 Jan 2013, at 13:06, Gabor Perlaki <[log in to unmask]> wrote:
> Is there any fast method to overlay the fMRI activations onto FLAIR image? Do I need to change the files in *.feat/reg directory and run a rendered_highres commad, or is there any easier way?
>
> Thanks,
> Gabor
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