Hi AFNI experts,
I have some 7T fMRI data with short reversed PE scans that I would like to use for distortion correction. I was hoping I could get some opinions about the best way to go about this. I know 3dQwarp's -plusminus option can be used for this, but (from a novice perspective) this seems like a less sophisticated approach than something like FSL's topup, which uses information about phase encoding direction as input. However, I've been having difficulty getting topup to work well (I am continuing to troubleshoot this issue), and it would be simpler to do the correction in AFNI, as I plan to do the rest of my processing with it.
What are your thoughts, will -plusminus give me reasonable results, or is it worth the time troubleshooting the FSL approach?
Thanks!
Walker