NAPLS3 Gradient Echo Phase Fieldmaps Help

[erickkim172]

Hello,
I am preprocessing NAPLS3 dataset, which has older gradient echo fieldmaps from GE scanners.
The resulting phase images have bands in them that may be related to improper unwrapping. This is the case for both the phase images output from dcm2niix and for phase images generated by using the real and imaginary images output from dcm2niix (fslcomplex -complex followed by fslcomplex -realphase). I aim to generate a phasediff image for downstream qunex starting with hcp_prefreesurfer.
Examples of the phase images are attached below from one subject in site 4. Any suggestions on how to fix this data and ultimately generate unwrapped phasediff images that are suitable for qunex hcp_prefreesurfer?

[effigies]

Hi @erickkim172, I don't immediately know what to make of this. I think posting on https://neurostars.org will attract more eyes.

[erickkim172]

I see, thanks for the reply!