What device is used to collect light emitted by storage plate phosphors?

• A. Photomultiplier tube
• B. Photodetector
• C. Charge-coupled device
• D. Image intensifier

Answer: (B)

The correct choice is the device that serves the function of sensing and converting light emitted by the storage plate phosphors into an electrical signal. A photodetector is specifically designed for this purpose, as it can effectively capture light photons and convert them into measurable electrical energy, leading to the production of an image.

In digital radiography, after exposure to X-rays, the storage phosphor plate retains energy and, upon being read, emits light proportional to the absorbed radiation. The photodetector picks up this emitted light and translates it into a digital signal that can be processed to form the final image.

While other devices like photomultiplier tubes are also used in the photonic field for light detection, they typically serve different contexts and applications. Charge-coupled devices are primarily used in cameras and some types of imaging sensors but not specifically for collecting light from storage plate phosphors. Image intensifiers amplify, or intensify, images received from input (light) to output (viewing screen) but do not serve the specific function of collecting light emitted from storage phosphors as a photodetector would. Thus, the role of a photodetector in this scenario is clear and central to the function of reading storage phosphor plates