Which of the following statements is true of Detector Elements (DELs)?

Detector Elements (DELs) are integral components of digital imaging systems, particularly in radiography. They play a vital role in determining spatial resolution, which is the ability of an imaging system to distinguish small structures that are close together. The correct answer states that DEL size is a permanent characteristic of the image receptor, highlighting that the physical dimensions of these elements are fixed and defined during the design of the imaging system.

This permanence is important because it affects the overall performance of the imaging system. Smaller DELs can provide higher spatial resolution, allowing for more detailed images, while larger DELs may result in lower resolution. Once manufactured, the size of the DELs cannot be altered without replacing the entire image receptor, thus emphasizing their intrinsic role in how well an imaging system can resolve fine detail in images.

Understanding that DELs are a permanent characteristic reveals insights into the design considerations of imaging systems. It reflects how technological choices in creating an image receptor can have lasting impacts on image quality, serving as a foundational concept in quality control and image evaluation in radiography.