That sounds interesting! Do you have a way to de-identify and send the dicoms for us to take a look at? I'm on holiday this week but could take a look next week, if you're able to send them. Otherwise, all I can say is we haven't seen that or heard of anything similar, before. ADIR_nii2dicom has its source code provided, so if you're comfortable with code you could try to take a look as well. We've tried to make it as robust as we can, but there's a seemingly infinite number of unusual dicom quirks in the world. If you know of a different nii2dicom converter, that'd work too, but I'm also not aware of a robust alternative that attempts to preserve the unrelated tags, as ours does.

Chris Schwarz