Which component of digital radiography receptors is responsible for capturing the radiation signal transmitted through the patient?

Which component of digital radiography receptors is responsible for capturing the radiation signal transmitted through the patient?

• A. Picture element (pixel)
• B. Detector element (DEL)
• C. Scintillator
• D. Photodiode

Answer: (B)

In digital radiography receptors, the signal that comes from the patient is captured by the detector element. This is the smallest sensing unit in the detector array, and it collects the energy (or charge) generated by the x-ray interaction at its location. In indirect systems, x-rays first produce light in a scintillator, and that light is converted to an electrical signal by a photodiode; the detector element is the part that gathers that signal from that location and sends it to the readout. The entire image is built from many of these detector elements, with each element corresponding to one pixel. So, the detector element is the component that captures the radiation signal transmitted through the patient.

In digital radiography receptors, the signal that comes from the patient is captured by the detector element. This is the smallest sensing unit in the detector array, and it collects the energy (or charge) generated by the x-ray interaction at its location. In indirect systems, x-rays first produce light in a scintillator, and that light is converted to an electrical signal by a photodiode; the detector element is the part that gathers that signal from that location and sends it to the readout. The entire image is built from many of these detector elements, with each element corresponding to one pixel. So, the detector element is the component that captures the radiation signal transmitted through the patient.