Which spatial frequency would produce the greatest spatial resolution?

Which spatial frequency would produce the greatest spatial resolution?

• A. 1.12 lp/mm
• B. 3.55 lp/mm
• C. 4.15 lp/mm
• D. 6.30 lp/mm

Answer: (D)

Spatial resolution is the ability to distinguish small, closely spaced details. In imaging, this is quantified by spatial frequency, measured in line pairs per millimeter. A higher spatial frequency means more line pairs fit into each millimeter, which corresponds to finer details and better resolution. Among the options, 6.30 lp/mm is the highest frequency, so it represents the smallest separations that can be resolved and thus the greatest spatial resolution. The lower frequencies—1.12, 3.55, and 4.15 lp/mm—reflect larger features and therefore lower resolution.

Spatial resolution is the ability to distinguish small, closely spaced details. In imaging, this is quantified by spatial frequency, measured in line pairs per millimeter. A higher spatial frequency means more line pairs fit into each millimeter, which corresponds to finer details and better resolution. Among the options, 6.30 lp/mm is the highest frequency, so it represents the smallest separations that can be resolved and thus the greatest spatial resolution. The lower frequencies—1.12, 3.55, and 4.15 lp/mm—reflect larger features and therefore lower resolution.