The science or study of radiation as used in medicine is called what?

• A. Radiology
• B. Radiograph
• C. Radiation
• D. Penumbra

Answer: (A)

Radiology is the field that studies and uses radiant energy in medicine to diagnose and treat disease. This makes it the best choice because it describes the medical science and specialty involved in using X-rays and other forms of radiation for imaging and therapy. A radiograph is simply the image produced after exposing film or a detector to X-rays, not the field itself. Radiation refers to the energy itself, not the study or practice. Penumbra is a term for the partial shadow around a edge in an image, a concept within imaging rather than the medical discipline.