Definitely raw dicoms. How are they planning to disseminate the information in the dicom header? I can see this (maybe?) working if you were also given the dicom header information along with the defaced nifti. I'm curious how things go.

Also, what are they doing with other types of scans (e.g. MRS)?

We talked about maybe exporting the info into json or something. I think that could be managed, but not optimal for sure.