I posted similarly: drpauldorio.com/.../radiology-collaboration-enhances-patient-care

But the third main obstacle that you did not mention is that medical liability risks will continue to deter radiologists from getting too involved in "gatekeeping." The problem being, of course, is that the radiologist thinks that s/he knows less about the patient's clinical status than the physician making the imaging request. That thought is usually accurate. But the radiologist sells him/herself short who does not realize that s/he has a fund of knowledge about potential imaging findings. That fund of knowledge, of course, can assist our clinical colleagues and help to identify appropriate imaging studies. I believe we can do it. But it will take a sea change of the radiology masses before it becomes actual practice.