How can image resolution be defined in radiography?

Image resolution in radiography is defined as the clarity and detail visible in an image. This attribute is crucial because it determines how well different structures within the image can be distinguished from one another. High resolution results in sharper images with more fine details, which is essential for accurate diagnosis. It encompasses factors such as spatial resolution, which relates to the ability to differentiate between closely positioned objects, and contrast resolution, which allows for the distinction of different tissue types.

The other options do not pertain directly to image resolution: capturing a wide variety of colors is more relevant to color depth and fidelity, brightness relates to the overall intensity or exposure of the radiograph and not its detail, while the speed at which an image is produced involves the efficiency of the imaging process rather than the quality of the image produced. Therefore, the definition focused on clarity and detail is the key aspect that characterizes image resolution in radiography.