In general, the best known and most prestigious programs - and they don’t need to be named, we’re talking common sense (Stanford, Hopkins, etc) reliably produce top notch radiologists at the very least for the fact that they attract the best, top notch physician candidates. The kind of people with stellar CVs and a combination of self directed industriousness, self discipline, social adjustment and intellect.
The facilities are nice. The lecture series and teaching structure is nice and the research opportunities are nice. But having the cream of each med school class nationwide working together as residents is by far the biggest indicator of outcome.
After the rarified top of programs it becomes rapidly homogeneous and quality of produced radiologists tend to be similar. With the exception that County based systems tend to produce better independent radiologists ready for the real world more reliability than programs where most training is at private and high income clientele.