Table 2.

Pearson correlation coefficients (r) among the values of Tb measures derived from postregistered micro‐CT and MDCT images of cadaveric ankle specimens from matching VOIs (n = 250) of diameter 5.25 mm. Mean values of Tb measures observed for the two scanners are shown. See Table 1 for definitions of Tb measures

Tb measure	Correlation coefficients (r)	micro‐CT (mean value)	MDCT (mean value)
vBMD (mg/cm3)	0.88	1158	993
tBMD (mg/cm3)	0.86	194	120
Tb.NA (cm2/cm3)	0.92	0.10	0.07
Tb.PW (μm)	0.87	541	861
Tb.PR (no unit)	0.85	2.85	7.02
Tb.Th (μm)	0.71	133	160
Tb.Sp (μm)	0.81	348	468
EI (no unit)	0.63	0.20	0.67
SMI (no unit)	0.78	0.76	2.23

For this experiment, MDCT images from the Siemens Flash scanner were used.