[Noah930]

I don't know exactly how the billing shakes out (that's the crux of the 'need' for a 2nd study), but there are times when a doctor will have a trusted radiologist re-read a study. I don't know the ins and outs of how the 2nd radiologist bills for the reading, but tertiary care centers (like at a university) will have patients bring in their completed studies so that the university radiologists (who are specialists on that particular sub-field) can re-read them.