Can radiology technicians release results to patients?

Under law, RT's are allowed to show you imagery and to release copies of that imagery to you. They are not legally permitted to diagnose, so they obviously cannot release a diagnosis never made.

In the real world, RT's can and frequently do show you the images taken. Their job description does not include copying or dissemination of patient information outside the care facility, so procedurally, requests like that would need to be passed on in house and handled by other personnel.