He should be able to call the radiology department and consult with a doctor who knows what all the tests do and what test is needed for this and that symptom or finding. And that's just what radiologists do or should do. Some continue to want to do that. But increasingly, PCPs are consulting with radiologists. There is a third side of radiology that has been underestimated and undervalued.
Radiologists are doctors first, then radiologists.
No one really thought about that when radiologists were sitting in dark rooms all day reading x-rays with little patient contact. But the field became increasingly complex and invasive. Radiologists began to administer dyes intravenously, stick catheters and balloons into arteries, and stick needles into all sorts of organs. So radiologists had to go find their old doctor bags and start interacting with patients face to face. The radiology department developed into an organization that provided competent image taking, interpretation, and consultation and at the same time protected the health and rights of patients.