Table 7.

Comparison of image quality action thresholds for the Small (S20) and Full‐Fan CBCT

	XVI (%)	OBI* (%)
High contrast spatial resolution(lp/mm)
f30	16	18
f40	11	18
f50	11	16
HU constancy
Lung(PMP)	9	6
Water(Poly)	6	12
Uniformity	10	12
Noise	11	12

*Data from Stanley et al.7