The ability to render small objects on the image describes which term?

• A. spatial resolution
• B. contrast resolution
• C. dynamic range
• D. signal

Answer: (A)

Rendering tiny details on an image is all about spatial resolution. This term describes how finely an imaging system can distinguish small structures or closely spaced objects; the smaller the objects you can visualize, the higher the spatial resolution. In practice, improving spatial resolution means using smaller pixels or voxels, better detector geometry, and sharper imaging optics so that fine details aren’t blurred. By contrast, contrast resolution is about telling apart different gray levels, dynamic range is the overall brightness span the system can show, and signal refers to the raw measured intensity—none of these describe the ability to resolve small objects as directly as spatial resolution does.