Which three of the following components are included in indirect capture flat-panel digital image detector systems?

In indirect capture flat-panel digital image detector systems, the primary components that facilitate the conversion of x-ray photons into digital images include a scintillator layer, a photodiode, and a thin-film transistor (TFT) array.

The scintillator layer is crucial as it absorbs incoming x-ray photons and converts them into visible light. This light is then detected by the photodiode, which plays a pivotal role in converting the optical signal into an electrical signal. Finally, the thin-film transistor array acts as a readout system that captures the electrical signals and converts them into a digital image for display and analysis.

In contrast, an image intensifier is not a component of indirect capture systems. Instead, image intensifiers are typically found in fluoroscopy systems and are used to convert x-ray photons to a visible image in a different manner. They amplify the image for better visibility but do not play a role in the digital image capture process as defined in indirect flat-panel systems. Thus, the inclusion of the image intensifier in the answer is not aligned with the functionality of indirect capture flat-panel detectors.