What is spatial resolution in digital radiography defined as?

Spatial resolution in digital radiography is defined as the structural sharpness recorded in the radiograph. This characteristic is crucial because it determines how well small details can be distinguished in an image. High spatial resolution indicates that fine details will be depicted clearly and sharply, allowing for better diagnosis and evaluation of anatomical structures.

In digital radiography, spatial resolution is influenced by factors such as pixel size and the distribution of pixels across the imaging area. However, the essence of spatial resolution specifically relates to the clarity and definition of structures captured in the image, which is fundamentally about how sharp and accurate the representation of those structures is. This makes the definition of spatial resolution as "structural sharpness recorded in the radiograph" the most accurate and relevant choice among the options provided.