Final answer:
Computed Radiography (CR) uses a two-part process where x-rays are captured on a phosphor plate and then converted to a digital image, distinguishing it from Digital Radiography (DR).
Step-by-step explanation:
The type of system that uses a two-part process to convert incoming x-ray photons to an electronic digital signal is Computed Radiography (CR). CR systems use a process where the x-rays are first captured on a phosphor plate that stores the image. The plate is then read with a laser that releases the stored x-ray energy as light, and that light is converted into a digital image. This is in contrast with Digital Radiography (DR) systems, which convert x-ray photons directly into a digital image without the intermediate step of a phosphor plate.