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Dear SPMers I'm running DARTEL for VBM for the first time and I'm a bit confused about the various steps and image types. I've worked through the tutorial just fine for a single group analysis, but I want to analysis two groups together by first warping individual patients and controls to two separate group templates, then warping the two group templates together. (Which I understand minimizes and confounds). I then want to apply the two warps in a single step, so I composed the flow fields using the Deformations tool. When I apply the resulting deformation to the c1 images (since that's what the tutorial does) the results are misaligned. Should I instead use the rc1 images when applying a deformation field based on two composed flow fields? If so, why does the tutorial go back to the original c1 images when applying the final warp? If it's to avoid a reslice step, then is there a way to get a deformation field to work on the original images like the flow fields do? Cheers Paul