Final answer:
An indirect conversion flat panel detector typically includes a scintillation layer, a photodetective layer, and a TFT layer for converting X-ray photons to digital images.
Step-by-step explanation:
The indirect conversion flat panel detector that is used in radiographic imaging systems generally consists of multiple layers, each with a specific function in the detection and conversion of X-ray photons to a digital image. The correct composition includes a scintillation layer, which is responsible for converting the incoming ionizing radiation into visible light photons.
It is followed by a photodetective layer such as amorphous silicon, which detects the light photons and converts them into electrical charges. Lastly, these charges are collected and read out by a thin-film transistor (TFT) layer, which is used to convert the patterns of charges into digital signals that can be processed into an image.