Summary
Bone mineral density (BMD) was determined in 32 excised vertebrae using three methods: (1) dual-energy quantitative computed tomography (QCT), (2) dual-photon absorptiometry (DPA) with 153-Gd in an anteriorposterior projection and (3) scanning slit X-ray absorptiometry (SSXA) in both AP and lateral projections. The QCT region-of-interest in the anterior vertebral body had a lower density than that of the total trabecular portion of the body, but was highly correlated to this larger region (r=0.96; SEE=8 mg/cm3). The anterior QCT region also correlated moderately with BMD from DPA (r=0.77; SEE=18 mg/cm3). Measurements of the vertebral body in lateral projection were less well correlated (r=0.5–0.7) to QCT densities. Both the anterior QCT region (r=0.81; SEE=18 mg/cm3) and the BMD from DPA (r=0.86; SEE=16 mg/cm3) were similarly predictive of density of the integral vertebral body. Differences among densitometric methods on the spine depend on the projection used and the region examined.
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Mazess, R.B., Pedersen, P., Vetter, J. et al. Bone densitometry of excised vertebrae; Anatomical relationships. Calcif Tissue Int 48, 380–386 (1991). https://doi.org/10.1007/BF02556450
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DOI: https://doi.org/10.1007/BF02556450