Hello,
For some of our participants, we did not obtain the magnitude images of the field maps from the scanner. We have the phasediff images and are wondering if there is a way to back-calculate the magnitude image from the phasediff image.
I have seen from FSL’s FUGUE that one can use fslcomplex to obtain magnitude images, but from what I am reading (Chris Rordens Neuropsychology Lab :: Fieldmaps), that seems to only work with real/imaginary images.
Thanks,
Hannah