Which radiography method uses a light stimulable phosphor plate?

• A. Conventional radiography
• B. Digital radiography
• C. Computed radiography
• D. Fluoroscopy

Answer: (C)

Storage phosphor imaging relies on a light-stimulable phosphor plate to capture X-ray exposure. The X-rays create trapped energy in a phosphor layer on a reusable plate. When the plate is read in a separate CR reader, a laser scans it and stimulates the phosphor to release the stored energy as light, which is then detected and converted into a digital image. This setup is the hallmark of computed radiography, which uses these plates and a laser reader to produce images after exposure. Conventional radiography uses film; digital radiography uses direct digital detectors with no removable plate; fluoroscopy provides real-time moving images rather than a stored plate.