Which term describes the ability to distinguish two closely spaced interfaces within tissue?

Which term describes the ability to distinguish two closely spaced interfaces within tissue?

• A. Contrast
• B. Resolution
• C. Noise
• D. Dynamic range

Answer: (B)

Spatial resolution describes the ability to distinguish two closely spaced interfaces within tissue. When interfaces are near each other, the imaging system’s finite sampling and the blurring from the point spread function cause their signals to overlap, so they may appear as one blurred boundary. Pushing for higher resolution—smaller pixels or voxels, higher frequencies, or wider bandwidth—reduces blur and allows you to separate interfaces that are closer together. Contrast, noise, and dynamic range affect how clearly that separation is seen, but they don’t determine the limit of separability itself.

Spatial resolution describes the ability to distinguish two closely spaced interfaces within tissue. When interfaces are near each other, the imaging system’s finite sampling and the blurring from the point spread function cause their signals to overlap, so they may appear as one blurred boundary. Pushing for higher resolution—smaller pixels or voxels, higher frequencies, or wider bandwidth—reduces blur and allows you to separate interfaces that are closer together. Contrast, noise, and dynamic range affect how clearly that separation is seen, but they don’t determine the limit of separability itself.