A Radiologist is a physician who specializes in using medical imaging to diagnose and treat illnesses. They review various imaging tools, including ultrasounds, MRI, CT, and X-rays, to provide accurate interpretations and collaborate with other healthcare professionals to ensure optimal patient care. Radiologists are medical doctors that specialize in diagnosing and treating injuries and diseases using medical imaging (radiology) procedures (exams/tests) such as X-rays, computed tomography (CT), magnetic resonance imaging (MRI), nuclear medicine, positron emission tomography (PET) and ultrasound.