Edmondston S J, Singer K P, Price R I, Breidahl P D
Department of Radiology, Royal Perth Hospital, Western Australia.
Br J Radiol. 1993 Apr;66(784):309-13. doi: 10.1259/0007-1285-66-784-309.
Lateral scanning with dual energy X-ray absorptiometry (DXA) was undertaken on 153 thoracic and lumbar vertebral bodies from nine individuals (mean age 67; range 34-92 years) to establish their bone mineral content (BMC). All specimens were subsequently de-fatted and ashed to compare ash weight with BMC of the T1 to L5 segments. Linear regression analysis indicated a higher correlation between BMC and measured ash weights for each vertebral column (range: r = 0.97-0.99), with error for all vertebrae tested showing a standard error of 0.40 g, or 10.8%. For the L2-4 segments the accuracy error was 0.50 g or 7.9%. In both cases there was a mean trend towards underestimation of ash weight. Mean BMC values of the T1 to T5 segments were similar before a progressive increase caudally. These data affirm the utility of DXA for determining bone mineral content in the vertebral column across wide ranges of age, and segmental and bone density.
对9名个体（平均年龄67岁；年龄范围34 - 92岁）的153个胸椎和腰椎椎体进行了双能X线吸收法（DXA）侧位扫描，以确定其骨矿物质含量（BMC）。随后对所有标本进行脱脂和灰化处理，以比较T1至L5节段的灰重与BMC。线性回归分析表明，每个脊柱的BMC与测量的灰重之间具有更高的相关性（范围：r = 0.97 - 0.99），所有测试椎体的误差显示标准误差为0.40 g，即10.8%。对于L2 - 4节段，准确误差为0.50 g或7.9%。在这两种情况下，均存在灰重平均被低估的趋势。T1至T5节段的平均BMC值在尾侧逐渐增加之前相似。这些数据证实了DXA在确定不同年龄范围、节段和骨密度的脊柱骨矿物质含量方面的实用性。
