Table 1.

Bone volume fraction, bone surface density, and the mean surface curvature of cancellous bone isosurfaces (mean ± SD) were measured in 5 rat lumbar vertebrae using the previous image processing techniques and the revised techniques presented in the current study. Non uniform illumination (NUI) correction was applied in all cases.

	0.7 μm	0.7 μm	3.6 μm	3.6 μm
	Previous	Revised	Previous	Revised
Bone Volume Fraction (BV/TV)	35.6 ± 3.5%	35.2 ± 3.3%	37.0 ± 5.5%	35.1 ± 3.3%
Bone Surface/Bulk Volume (BS/TV, 1/mm)	12.8 ± 1.3	13.8 ± 2.6	11.7 ± 2.0	11.6 ± 1.7
Mean Surface Curvature (1/μm)	2.6 ± 0.6	1.8 ± 0.5*	1.1 ± 0.6	1.3 ± 0.5

^*Different from image processed using previous methods (p <0.05, paired t-test)