Fig. 6.

Registration accuracy using BBR. The fully pre-processed average attenuation profile volume for the b = 1000 s/mm² shell is registered to the high resolution T2-weighted volume in subject's native space (top row). When using BBR the tissue boundaries are better aligned to those extracted from the high-resolution volume, as shown by the two insets (red box). Red arrows point to areas where standard volumetric registration resulted in residual misalignments in the left hemisphere (bottom row). White/grey matter (green) and grey/csf boundaries (light blue) are overlaid on top of the attenuation profile transformed to the T2 anatomical space.