Curie's wartime medical work is linked to which device?

• A. Mobile x-ray units
• B. CT scanners
• C. MRI machines
• D. Ultrasound devices

Answer: (A)

This item is testing how imaging technology was turned into a practical tool for treating soldiers on the move. Marie Curie’s wartime work links directly to portable X-ray capability. She extended her research on radioactivity into medicine by helping to bring X-ray imaging to the front lines during World War I. She organized and funded mobile radiography units, outfitted vehicles with X-ray machines, and trained operators so surgeons could image wounds close to where battles happened. This meant doctors could locate bullets, shrapnel, and broken bones quickly, guiding treatment and often saving lives.

The other imaging technologies—CT scanners, MRI machines, or ultrasound devices—were developed much later or did not form part of Curie’s wartime program. CT and MRI came decades after the war, and ultrasound, while in use elsewhere, was not what Curie’s wartime work is associated with. So the device most closely tied to Curie’s wartime medical impact is the mobile X-ray unit.