A sampling frequency of 5 pixels per millimeter results in how much spatial resolution?

To determine the spatial resolution from a given sampling frequency, a commonly used rule of thumb states that spatial resolution in line pairs per millimeter is approximately half of the sampling frequency in pixels per millimeter.

In this case, with a sampling frequency of 5 pixels per millimeter, the calculation for spatial resolution would be:

Spatial Resolution = Sampling Frequency / 2 = 5 pixels/mm / 2 = 2.5 line pairs/mm.

This calculated result demonstrates that the spatial resolution achieved at a sampling frequency of 5 pixels per millimeter is indeed 2.5 line pairs per millimeter. Therefore, selecting this option reflects an understanding of how sampling frequency directly influences the image resolution in imaging modalities such as radiography.