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QJM Advance Access originally published online on March 10, 2008
QJM 2008 101(8):605-617; doi:10.1093/qjmed/hcn022
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© The Author 2008. Published by Oxford University Press on behalf of the Association of Physicians. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

DXA scanning in clinical practice

A. El Maghraoui1 and C. Roux2

From the 1Rheumatology and Physical Rehabilitation Centre, Military Hospital Mohammed V, Rabat, Morocco and 2Department of Rheumatology, Cochin Hospital, Paris-Descartes University, Paris, France

Address correspondence to Prof. A. El Maghraoui, Rheumatology and Physical Rehabilitation Centre, Military Hospital Mohammed V, Rabat, PO Box: 1018, Morocco. email: aelmaghraoui{at}gmail.com

Received 31 October 2007 and in revised form 16 January 2008


  Abstract

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.


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