I have sort of answered this question below.
Final interpretations must be performed by a radiologist residency trained in the USA, licensed in the state there are reading from, and credentialed for the facility and the insurance company.
Why? Well, I guess it's supposed to be to ensure quality. In general, it is probably good that every hospital in the USA has an independent credentialing process. You could debate the fact that doctors in the USA are better trained, but in fact that has overwhelmingly been my experience.
Cynically, I believe that the lawyers need someone to sue. Like I said, most doctors complain about malpractice, but not me. The trial lawyers can't sue doctors overseas, but they can sue me. So, in a sense they are my ally, they ensure that no one else ( except people they can sue ) can read the studies.
That being said, there are companies that take USA trained radiologists and station them overseas. Australia and Geneva are both popular. They take advantage of the time difference to read hospital cases that occur overnight, when I am home in bed. They usually provide a preliminary read, something like "no appendicitis." The next day I do a final read, look for mistakes in the preliminary read, and in general do a more thorough job. Sure, there's no appendicitis, but the preliminary read didn't mention the small tumor in your left kidney that kind of looks like a cyst, but isn't.
FYI - overseas reads by USA trained radiologists tend to be more expensive, not less.
Anyway, thanks for jquery.