A radiologist is a medical doctor who uses imaging tests, such as X‑rays, CT scans, and MRIs, to look inside the body and help diagnose and treat diseases. They often work behind the scenes, studying images and writing reports for other doctors.
The word combines “radio-” from “radiation” or “rays” and “-logist,” from Greek “-logistēs,” meaning “one who studies.” It arose in the early 1900s as X‑rays and other imaging technologies became important tools in medicine.
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