What does the term "spatial resolution" refer to in radiography?

Spatial resolution in radiography refers to the ability to distinguish between small structures within an image. It is a critical aspect of image quality, as higher spatial resolution allows for finer details to be seen clearly. This means that when spatial resolution is maximized, radiologists can identify smaller anatomical features or pathological conditions that may not be discernible at lower resolutions.

The clarity of the entire image, while important, is more about overall image quality and does not specifically address the detail with which small structures can be visualized. Consistency of image brightness pertains to the uniformity of the exposure across the image rather than the ability to resolve fine detail. The angle of the x-ray beam primarily influences image distortion and does not relate to the resolution of small structures within the image. Therefore, distinguishing between small structures is the most accurate and specific definition of spatial resolution in the context of radiography.