A roentgenologist is a medical professional specialized in radiology. There are several synonyms to describe this profession. First, radiologist is a common term used to describe a roentgenologist. They use imaging techniques like X-rays, CT scans, and MRIs to diagnose and treat medical conditions. Second, radiographer is another synonym that can be used, although this term is more specific to individuals who are trained to perform the actual imaging tests. Third, diagnostic imaging specialist is a broader term that can be used to describe medical professionals who work with radiology technology. Lastly, radiation therapist is another synonym that refers to healthcare professionals who administer radiation treatment to patients for cancer or other medical conditions.