What is the term for the percentage of the DEL that is devoted to the detection layer?

What is the term for the percentage of the DEL that is devoted to the detection layer?

• A. Amorphous selenium
• B. Amorphous silicon
• C. Fill factor
• D. Dexel

Answer: (C)

Fill factor is the percentage of each detector element that is active sensing area. In flat-panel detectors, each DEL is made up of many Dexels, and the detection layer sits only in part of the element while the rest contains circuitry and interconnections. A higher fill factor means more of the pixel area is sensitive to X-rays, which improves the detector’s efficiency and image quality. The other terms refer to materials used for the detection layer or to a single detector element, not to the proportion of active area.

Fill factor is the percentage of each detector element that is active sensing area. In flat-panel detectors, each DEL is made up of many Dexels, and the detection layer sits only in part of the element while the rest contains circuitry and interconnections. A higher fill factor means more of the pixel area is sensitive to X-rays, which improves the detector’s efficiency and image quality. The other terms refer to materials used for the detection layer or to a single detector element, not to the proportion of active area.