El Maghraoui A, Roux C
Rheumatology and Physical Rehabilitation Centre, Military Hospital Mohammed V, Rabat, PO Box: 1018, Morocco.
QJM. 2008 Aug;101(8):605-17. doi: 10.1093/qjmed/hcn022. Epub 2008 Mar 10.
Dual-energy X-ray absorptiometry (DXA) is recognized as the reference method to measure bone mineral density (BMD) with acceptable accuracy errors and good precision and reproducibility. The World Health Organization (WHO) has established DXA as the best densitometric technique for assessing BMD in postmenopausal women and based the definitions of osteopenia and osteoporosis on its results. DXA allows accurate diagnosis of osteoporosis, estimation of fracture risk and monitoring of patients undergoing treatment. However, when DXA studies are performed incorrectly, it can lead to major mistakes in diagnosis and therapy. This article reviews the fundamentals of positioning, scan analysis and interpretation of DXA in clinical practice.
双能X线吸收测定法（DXA）被公认为是测量骨密度（BMD）的参考方法，其具有可接受的准确性误差以及良好的精密度和可重复性。世界卫生组织（WHO）已将DXA确立为评估绝经后女性骨密度的最佳密度测定技术，并根据其结果对骨质减少和骨质疏松症进行定义。DXA能够准确诊断骨质疏松症、估计骨折风险并监测接受治疗的患者。然而，当DXA检查操作不正确时，可能会导致诊断和治疗中的重大错误。本文回顾了临床实践中DXA的定位、扫描分析及解读的基本要点。
