Table 2

Quantitative Image Quality Parameters

120 kV100 kVp Value
Image noise (HU)19 (16–22)24 (21–28)<0.001
Signal intensity (HU)352 (310–399)477 (434–527)<0.001
Signal-to-noise ratio18.4 (15.4–22.7)19.9 (15.9–23.5)0.254
Contrast-to-noise ratio13.6 (10.9–17.3)15.1 (11.8–18.6)0.027

Data are presented as median (interquartile range).