What does the fill factor for a detector element represent?

The fill factor for a detector element is crucial in understanding the efficiency and sensitivity of an imaging system in radiology. It specifically represents the percentage of the pixel face that is sensitive to x-rays. A higher fill factor indicates that a larger portion of the pixel area is actively detecting radiation, which directly impacts the quality of the captured image. Essentially, a greater fill factor results in improved image resolution and contrast because more of the pixel's surface is engaged in signal generation from x-ray interactions.

In imaging systems, the fill factor is important as it affects the overall performance of the detector, including its ability to accurately capture details in the radiographic images. Therefore, when evaluating different detectors or imaging technologies, understanding the fill factor can help in determining which systems may provide better diagnostic capabilities.