Which DEL size provides higher spatial resolution: 0.1 mm or 0.5 mm?

Which DEL size provides higher spatial resolution: 0.1 mm or 0.5 mm?

• A. 0.5 mm
• B. 1.0 mm
• C. 0.1 mm
• D. 0.3 mm

Answer: (C)

Smaller detector element size leads to finer sampling of the image, which allows you to distinguish smaller features. A DEL of 0.1 mm samples the image in much finer steps than a DEL of 0.5 mm, so it can resolve details on the order of a tenth of a millimeter rather than half a millimeter. In imaging systems, spatial resolution is limited by the smallest sampling unit; shrinking that unit improves resolution, assuming there are enough detected events to populate the image. The trade-offs include lower photon counts per element and higher data rates, but the fundamental relationship is that smaller DEL size yields higher spatial resolution.

Smaller detector element size leads to finer sampling of the image, which allows you to distinguish smaller features. A DEL of 0.1 mm samples the image in much finer steps than a DEL of 0.5 mm, so it can resolve details on the order of a tenth of a millimeter rather than half a millimeter. In imaging systems, spatial resolution is limited by the smallest sampling unit; shrinking that unit improves resolution, assuming there are enough detected events to populate the image. The trade-offs include lower photon counts per element and higher data rates, but the fundamental relationship is that smaller DEL size yields higher spatial resolution.