> I want to use eddy distortion correction of dsi data. We acquired diffusion volumes in A>P phase encoding direction and an additional B0 in R>L. I tried to run Topup on the B0 volumes but got an error message saying "error in size-match along non-concatenated dimension".
That doesn’t sound like an error message I recognise from topup. Are you sure that doesn’t come from fslmerge (for example if you have a script that prepares the data for you that calls fslmerge)?
> Any help on this will be greatly appreciated.
> Thank you,