Which of the following affects the spatial resolution in digital radiography?

Spatial resolution in digital radiography refers to the ability to distinguish small objects that are close together within an image. The size of the detector elements, or pixels, plays a crucial role in this aspect. Smaller detector element sizes can capture more details in the image, resulting in higher spatial resolution. When the detector elements are too large, they cannot discern between closely adjacent structures, which degrades the overall image quality and sharpness.

While image processing algorithms, display monitor quality, and the type of x-ray tube may influence other aspects of image quality, such as contrast or overall image presentation, they do not directly affect the fundamental resolution capabilities that are determined by the size of the detector elements. Thus, the detector element size is directly responsible for determining how finely detail can be resolved in the digital radiography images.