What term describes the amount of detail observed in an x-ray image?

The term that describes the amount of detail observed in an x-ray image is spatial resolution. Spatial resolution refers to the ability of an imaging system to differentiate between two points that are close together, which directly impacts the clarity and detail of the x-ray image. High spatial resolution means finer details are visible, allowing for better evaluation of structures in the image.

Other terms like contrast resolution and temporal resolution are related to image quality but focus on different aspects. Contrast resolution deals with the system's ability to distinguish between different densities, which affects the visibility of subtle differences within tissues. Temporal resolution pertains to the ability to capture changes over time, which is particularly relevant in dynamic imaging scenarios rather than the static images produced by standard x-rays. Dynamic range relates to the range of exposure values that an imaging system can accurately capture, impacting the overall quality but not directly the detail observed.