Thank you all for your comments.
As for the MR images, I am not able to provide the original images without further processing. The data comes from clinical collaborators working on a confidential brain imaging project, with the data not yet published. I do not have their permission to share the data. Another concern is that, although the metadata is already anonymized, with these MR head datasets, it is possible to reconstruct the facial features, which can violate the GDPR !
Would pydicom or another tool be able to zero out the pixel data and save the files without any changes to the DICOM metadata? If so, then I can send such cleaned out data. If you have experience with this on pydicom or another library, let me know. I could try it myself in a couple of days, but I have no experience which tool can clean up the pixel data while keeping the meta data untouched. Any ideas? Thanks.