What principle underlies computed radiography (CR)?

The principle that underlies computed radiography (CR) is based on the use of photostimulable phosphor plates. These plates serve as the imaging medium, capturing the x-ray energy and storing it in a latent form. When the plates are exposed to ionizing radiation, they absorb the energy and hold it until they are processed. During processing, a laser scans the plate, stimulating the phosphors to release the stored energy as visible light. This emitted light is then captured and converted into a digital image.

This method is distinct from other imaging techniques that may use digital sensors, which are not employed in CR. Additionally, while immediate image display and the elimination of a dark room are advantages associated with CR systems, they do not define the fundamental principle of the technology itself. Instead, the focus on photostimulable phosphor plates is what characterizes computed radiography as a method within digital imaging.