Small differences in affines and bvecs bewtween AP and PA scans crash qsiprep

[Steven]

Hi @romanbelenya, and welcome to neurostars!

Please see this thread which already addressed this: Different FOV errors - #2 by mattcieslak

@mattcieslak

Hi, it looks like there are different fields of view in your images. If the scanner re-shimmed between the two acquisitions then your distortion correction is going to be off. That’s why there’s a strict check here.

If you’re confident that there wasn’t a re-shimming between your acquisitions you can manually copy the affine from one of your images into the other (eg the affine from the dir-AP_dwi to the dir-PA_dwi).

I am not sure you want to be changing your bvec files though.

Best.
Steven