Hello,
This is a known limitation of medInria 2.0.1. All image files imported, apart from Dicom, do not have patient name tags or other information and get filled with John Doe by default. We are working on an editing system for the database for the next release of medInria.
Until then, the only alternative would be for you to load the image rather than import and then save it to the database. In that case, the name of the patient will get the filename.
Hope that helps