In Germany the person who makes the x-ray is the owner of the right
("Leistungsschutzrecht" according ยง 72 Copyright Act) even the work is
made for hire.
The discussion is full of confusion of privacy rights and copyright.
The distribution of the x-rays may be restricted by the patient's
rights but if x-rays are copyrighted the patient isn't the owner of
the copyright and cannot distribute the x-rays of his body.
Klaus Graf
http://archivalia.tumblr.com/