PSP plates rely on which technology?

• A. Solid-state silicon detectors
• B. Digital imaging sensors
• C. Photoinitiated phosphor layers
• D. Photostimulable phosphor technology

Answer: (D)

PSP plates rely on photostimulable phosphor technology. After X-ray exposure, energy is stored in a phosphor layer within the plate. When the plate is later scanned with a laser, the trapped energy is released as light (photostimulated luminescence), and this light is captured and digitized to form the image. This indirect readout lets the plate be erased and reused after light exposure. Other options describe different detector types (solid-state detectors or digital sensors) or use terminology that doesn’t match the actual storage-and-readout mechanism, whereas photostimulable phosphor precisely describes how PSP imaging stores and then releases energy.