If copyright dictates use and my private parts are between me and my physician, dentist, and anyone else I deem essential to disclose to then copyright should be to me. Access to my own material should be given upon payment of service, whether that be through my government provided insurance and co-payment or through personal private insurance, or rather through personal payment. Medical information is private unless chosen to be disclosed to someone else. The only other copyright involved might be on the methods used for getting the image, or the processes used in acquiring and processing the data (ie. digital code/programming). I don't see how a doctor or medical device supplier could claim ownership or proprietorship over my private data in this case. Unless bizarrely there is an agreement beforehand that this will be the case. I would think payment for services rendered would be sufficient to give ownership. An artist doesn't own a commissioned photograph anymore than the doctor owns an x-ray.