Dual energy X-ray
absorptiometry (DXA) is a dominant technique for the measurement of bone
mineral density (BMD). Quality control (QC) of DXA is very important for the
accuracy of results and correct interpretation made by the physician. We have
performed the quality control procedures of Lunar DPX Pro bone densitometer
according to the manufacturer’s recommendations and current clinical guidelines
at the Institute of Nuclear Medicine & Allied Sciences (INMAS), Khulna. The
objective of this study is to maximize the performance of the technologist as
well as the reliability of the equipment (Linearity, X-ray tube output, Half
value layer, Kerma-area product, Radiation field size, Fan angle, Spatial
resolution, Room safety). The study result shows that the mean BMD reading is
1.004 g/cm2 with a standard deviation of 0.0035 and co-efficient of
variation 0.34%. It also shows that the precision of the technologist is good
and there is no malfunctioning in the DXA bone densitometer.
References
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Zaman, M.U., et al. (2009) Dual X-Ray Absorptiometry (DXA): Basic Techniques and Clinical Facts. Pakistan Journal of Radiology, 19, 56-59.
[2]
Guglielmi, G., et al. (2014) Quality Assurance in Bone Densitometry. Current Cardiology Reports, 2, 33. https://doi.org/10.1007/s40134-013-0033-9
[3]
World Health Organization (2007) Assessment of Osteoporosis at the Primary Health Care Level. Summary Report of a WHO Scientific Group.
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World Health Organization (1994) Assessment of Fracture Risk and Its Application to Screening for Postmenopausal Osteoporosis: Technical Report Series 843. WHO, Geneva.
[5]
Lewiecki, E.M. and Lane, N.E. (2008) Common Mistakes in the Clinical Use of Bone Mineral Density Testing. Nature Clinical Practice, Rheumatology, 4, 667-674. https://doi.org/10.1038/ncprheum0928
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Lewiecki, E.M., Binkley, N. and Petak, S.M. (2006) DXA Quality Matters. Journal of Clinical Densitometry, 9, 388-392. https://doi.org/10.1016/j.jocd.2006.07.002
[7]
Slavchev, A., et al. (2008) National Protocol for Quality Assurance in DXA-Bone Densitometry. Polish Journal of Medical Physics and Engineering, 14, 207-215. https://doi.org/10.2478/v10013-008-0017-x
[8]
Larkin, A., et al. (2008) Commissioning and Quality Assurance of Dual Energy X-Ray Absorptiometry (DEXA) System. Radiation Protection Dosimetry. (In Press)
[9]
Sheahan, N.F., et al. (2005) Commissioning and Quality Assurance Protocols for Dual Energy X-Ray Absorptiometry (DEXA) Systems. Radiation Protection Dosimetry, 117, 288-290. https://doi.org/10.1093/rpd/nci741
