I have data from 2 studies: one single-shell, and the other multi-shell. I am trying to register and warping the FOD map from one study to the other study’s template to visually compare differences between these studies and to appreciate whether single-shell acquisitions are acceptable relative to multi-shell acquisitions. To do so, I have run mrregister with the wmfod from the single-shell study, the mask1 option, and the template from the multi-shell study. I also outputted the non-linear deformation fields with nl_warp. Then, I applied those transformation to create the FOD map in template space using mrtransform.
The mrregister step computed without error, but there is obviously a problem with my FODmap in template space overlaid on the wmfod_template. I think the problem comes from the mrregister step. I was wondering if it’s a problem that the 2 studies do not have the same voxel sizes? Plus, the single-shell study has anisotropic voxel size.
thank you for your help!