Thanks! I have yet another question...sorry!

I've converted the tracts to RAS mm with vox_to_ras, warped them to standard space with an affine matrix output by FSL's TBSS when I registered the FA map, and converted them back to voxel coordinates. When I opened my warped FA map and tracts in DSI studio though, they're not quite aligned--maybe off by a few voxels in each direction. When I opened the original FA map in mricron, it seems like the offset of the center voxel from the AC is approximately the same offset I see in DSI Studio.

Should I be taking account of this offset before I apply vox_to_ras and my other transformations? Or does DSI studio automatically set the center voxel to the AC when you import a Nifti? The center voxels are definitely different in mricron and DSI studio.