I wanted to include fieldmap-based distortion correction in my preprocessing with fmriprep (this case). Unfortunately, according to the scanner technician there is no way whether the
j-, other than trying both out and see which one does better.
i did that, but in the fieldmap part of the report, there is no change between the
moving phases of the images. So, that makes it hard to tell which
PhaseEncodingDirection was the correct one and makes me also wonder whether the distortion correction actually worked. In case it matters, I also included the SyN correction, which seems to do its job.
Here the two reports.
_fmap corresponds to