PMC

Correlation of BMD values as measured by QCT and radiographic bone aluminum equivalence (RBAE).

Correlation between BMD and bone circumference of the metacarpal/metatarsal as measured by QCT, DXA, and RBAE. All methods showed strong correlations, but the correlation determination was lowest for QCT.

Comparison of BMD values as measured by QCT among ROIs in cortical bone. The BMD values were significantly lower for the palmar/plantar cortex than for other regions of the cortex.

Comparison of BMD values between metacarpal and metatarsal bones as measured by QCT, DXA, and RBAE. When measured by RBAE, the metatarsal BMD was significantly higher than the metacarpal BMD.

Change in BMD with age in Thoroughbred horses (N=37, 12 male, 25 female, 0−28 years old). The BMD values of bones from horses euthanized because of fracture are within the population range.

Comparison of BMD values as measured by QCT and dual energy X-ray absorptiometry (DXA). There were strong correlations for the whole bone (cortex and center) and dorsal cortex, but not for the center.

Measurement of bone mineral density (BMD) by quantitative CT (QCT) using a phantom for calibration. Circles show regions of interest (ROIs) on a cross-sectional image at the level of the nutrition foramen of the metacarpal/metatarsal bone and areas of different densities of hydroxyapatite in the phantom.

BMD values at different ages (14, 12 and 1 year of age and 1 day of age) as measured by QCT, DXA, and RBAE. QCT and DXA measurements exhibited a similar pattern, but RBAE could not distinguish between 14-, 12- and 1-year-old bone.