What is the greatest disadvantage of digital imaging?

The correct answer highlights spatial resolution as the greatest disadvantage of digital imaging because it refers to the ability of the imaging system to distinguish small structures and details. Digital imaging relies on pixel size and the number of pixels in an image to determine how finely it can represent detail. While digital systems have advanced significantly over the years, there are still instances where the spatial resolution may not match that of traditional film-based systems, particularly in very high-resolution requirements.

The other choices, while relevant, do not capture the primary limitation as effectively. The cost of technology is a consideration in the adoption of digital imaging, but it does not directly affect the image quality itself. Limited color range may apply in some contexts, primarily focused on applications like radiography where color representation is less critical. Increased radiation dose is a concern as well, especially with certain imaging techniques; however, advancements in digital imaging have also been aimed at dose reduction, thus making this less of a universal disadvantage compared to the inherent limitations in spatial resolution.