Which component within a digital radiography receptor is primarily responsible for capturing the transmitted radiation signal?

Which component within a digital radiography receptor is primarily responsible for capturing the transmitted radiation signal?

• A. Picture Element (Pixel)
• B. Charge-Coupled Device
• C. Detector Element (DEL)
• D. Scintillator Array

Answer: (C)

In a digital radiography receptor, the component that directly collects the signal from each image area is the detector element. Each detector element, or DEL, sits beneath a small area of the scintillator (in indirect DR) and converts the light produced by X-ray interaction into an electrical signal that is stored for readout. This is the actual sensing unit that captures the transmitted radiation’s signal and translates it into a charge representing that signal. The other parts play their roles in the process but don’t single-handedly capture the transmitted radiation signal. The scintillator array converts X-rays to light first, providing the intermediary signal to be detected. The pixel concept refers to the digital image’s final elements, not the physical sensing unit. A Charge-Coupled Device is a type of image sensor used in some systems, but many DR receptors use a photodetector array with a TFT rather than a standalone CCD.

In a digital radiography receptor, the component that directly collects the signal from each image area is the detector element. Each detector element, or DEL, sits beneath a small area of the scintillator (in indirect DR) and converts the light produced by X-ray interaction into an electrical signal that is stored for readout. This is the actual sensing unit that captures the transmitted radiation’s signal and translates it into a charge representing that signal.

The other parts play their roles in the process but don’t single-handedly capture the transmitted radiation signal. The scintillator array converts X-rays to light first, providing the intermediary signal to be detected. The pixel concept refers to the digital image’s final elements, not the physical sensing unit. A Charge-Coupled Device is a type of image sensor used in some systems, but many DR receptors use a photodetector array with a TFT rather than a standalone CCD.