Radiologists are medical doctors (MDs) or doctors of osteopathic medicine (DOs) who specialize in diagnosing and treating diseases and injuries using medical imaging techniques, such as x-rays, computed tomography (CT), magnetic resonance imaging (MRI), nuclear medicine, positron emission tomography (PET) and ultrasound. At YRMC, radiologists interpret the results of these studies and more, providing their expert diagnoses and recommendations to other physicians in order to help cure illness and heal injury.