Table 2.

HR-pQCT-derived trabecular structure measures and MDCT-derived apparent trabecular structure measures acquired with the 64-slice (64) and the 320-slice (320) MDCT device

	HR-pQCT	MDCT
		64 – A	320 – A	64 – B	320 – B
BV/TV (%)	24 ± 6 [22; 27]	39 ± 19 [30; 48]	46 ± 17 [37; 54]	40 ± 21 [29; 50]	36 ± 19 [27; 45]
Tb.N (1/mm)	1.38 ± 0.30 [1.24; 1.52]	0.56 ± 0.15 [0.49; 0.63]	0.68 ± 0.12 [0.63; 0.73]	0.47 ± 0.14 [0.41; 0.54]	0.50 ± 0.16 [0.42; 0.58]
Tb.Th (mm)	0.25 ± 0.02 [0.24; 0.26]	0.67 ± 0.22 [0.56; 0.78]	0.65 ± 0.20 [0.56; 0.75]	0.79 ± 0.31 [0.64; 0.94]	0.68 ± 0.22 [0.58; 0.78]
Tb.Sp (mm)	0.77 ± 0.31 [0.63; 0.92]	1.31 ± 0.87 [0.90; 1.73]	0.87 ± 0.46 [0.65; 1.09]	1.62 ± 1.20 [1.04; 2.19]	1.66 ± 1.21 [1.09; 2.23]

Data are expressed in mean ± standard deviation, 95% confidence interval [lower bound, upper bound]

A 120 kVp, 200 mA; B 135 kVp, 400 mA