Table 4 Mean differences and 95% limits of agreement between measurements obtained with μCT and CBCT images at different tube voltage settings

Trabecular measurements

 BV/TV (%)

 μCT-CBCT₈₀

−2.16 ± 11.51

−24.72

20.40

0.3111

 μCT-CBCT₈₅

−2.83 ± 12.13

−26.60

20.40

0.2110

 μCT-CBCT₉₀

−2.33 ± 9.91

−21.75

17.09

0.2272

 Tb.Th (mm)

 μCT-CBCT₈₀

−0.41 ± 0.05

−0.93

0.11

< 0.0001^*

 μCT-CBCT₈₅

−0.41 ± 0.05

−0.94

0.11

< 0.0001^*

 μCT-CBCT₉₀

−0.43 ± 0.05

−0.93

0.07

< 0.0001^*

 Tb.Sp (mm)

 μCT-CBCT₈₀

−0.40 ± 0.12

−1.65

0.83

< 0.0001^*

 μCT-CBCT₈₅

−0.51 ± 0.11

−1.66

0.64

< 0.0001^*

 μCT-CBCT₉₀

−0.43 ± 0.11

−1.65

0.69

< 0.0001^*

Cortical measurements

 Ct.Ar (mm²)

 μCT-CBCT₈₀

−5.26 ± 111.23

−1199

1188

0.9626

 μCT-CBCT₈₅

−38.73 ± 111.22

−1232.74

1155.27

0.7302

 μCT-CBCT₉₀

−23.63 ± 113.98

−1247.33

1200.06

0.8372

 Ct.Th (mm)

 μCT-CBCT₈₀

−0.42 ± 0.07

−1.16

0.31

< 0.0001^*

 μCT-CBCT₈₅

−0.45 ± 0.08

−1.26

0.35

< 0.0001^*

 μCT-CBCT₉₀

−0.44 ± 0.07

−1.21

0.33

< 0.0001^*