Effect of Pixel Size on Resolution

The radiograph shown above was obtained using a small cassette (20 cm x 25 cm), with a pixel size of 100 micron (0.1 mm). The limiting spatial resolution is approximately 3 lp/mm.

The radiograph shown above was obtained using a large cassette (35 cm x 43 cm), with a pixel size of 180 micron (0.18 mm). The limiting spatial resolution has been reduced to approximately 2.5 lp/mm.