ConcatenateDiffusionData[{{data₁,..,dataN},{grad₁,..,gradN},{bval,..,bvalN},{vox,..,voxN}}]

concatenates the diffusion data sets.

ConcatenateDiffusionData[{data₁,..,dataN},{grad₁,..,gradN},{bval,..,bvalN},{vox,..,voxN}]

concatenates the diffusion data sets.