(Hope this is the correct place to post questions about dHCP data.)
I am looking at the diffusion data in dHCP. I found that the data documentation say “V. Diffusion data are aligned to high-resolution structural (T2-weighted) space using boundary-based registration8 , 9 on the average attenuation volume for the b=1000 s/mm2 shell (i.e. b1k/b0). This transformation is combined with a non-linear registration1 0 of the T2w volume to the 40 weeks template1 1 to allow transformations between diffusion and atlas spaces.”
I wonder if this means that the provided dMRI data is already in the T2w space, e.g. XX_desc-preproc_dwi.nii.gz and XX_desc-restore_T2w.nii.gz.
If this was correct, while for most subjects the DWI and T2w visually looking to be aligned well, some subjects are not, e.g. sub-CC00060XX03_ses-12501.
Otherwise, could you let me know if there are additional warping steps needed.