Our overdiagnosis series continues with a look at radiology. The p Radiologists specialize in diagnosing and treating problems using medical imaging techniques, such as x-rays, CT and MRI scans, ultrasound and other forms of imaging. Dr. Saurabh Jha says his profession can be both the arsonist and the firefighter when it comes to overdiagnosis. And although radiologists can be at the center of overdiagnosis problems, he says his specialty has been slow to address the issues. He's on Twitter as @RogueRad.