Answer :

Final answer:

Detector plates in DR are categorized as direct, using semiconductors to convert radiation into electrical charge, and indirect, using a scintillator to convert X-rays to light detected by CCD or CMOS sensors.

Explanation:

The types of detector plates used in Digital Radiography (DR) are direct and indirect detector plates. The direct detectors use semiconductors like amorphous selenium that convert incident radiation into an electrical charge directly. This type of detector is a solid-state radiation detector because it uses solid semiconductors to detect radiation. On the other hand, indirect detectors first convert the incoming X-rays into visible light using a scintillator layer, which is then detected by a photodetector, typically a Charge-Coupled Device (CCD) or a Complementary Metal-Oxide Semiconductor (CMOS) sensor, which converts the light into electrical charge.Both types of these detectors have seen advancements. Image Plate Scanners, often used in protein crystallography, are a form of indirect detectors where the sensor is sensitive to X-rays and the readout is done by scanning with a laser after exposure. Direct detectors are now using CMOS technology, allowing for short readout times and increased frame rates, beneficial in various scientific applications.

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