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Calcified Tissue International

, Volume 43, Issue 3, pp 189–191 | Cite as

Dual energy radiography (DER): A preliminary comparative study

  • R. Pacifici
  • R. Rupich
  • I. Vered
  • K. C. Fischer
  • M. Griffin
  • N. Susman
  • L. V. Avioli
Rapid Communication

Summary

Dual energy radiography (DER) has been recently proposed as a new technique for the non invasive measurement of vertebral mineral density. This preliminary study was undertaken to assess the short-term precision of DER and to compare DER to dual photon absorptiometry (DPA) measurements. Three DER measurements were obtained in 19 healthy volunteers (mean age 34.7 ±9.3 years) over a 3 week period. In addition, both DER and DPA measurements were obtained in 52 women (mean age 54.3±12.5 years). The coefficient of variation for the DER measurements was 1.00%. A highly significant correlation (r=0.94; p<0.0001) was found between DPA and DER. Using this curve a conversion factor of −6.8% was calculated to convert DER to DPA values. Both DER and DPA were significantly and similarly correlated with age (r=−0.43, p<0.005; r=−0.38, p<0.05, respectively). The rates of bone loss, 0.66% per year for DER and 0.57% per year for DPA, were also similar with the two techniques. From these data, it is concluded that DER is a precise new method for vertebral bone mass measurements.

Keywords

Bone Mineral Content Quantitative Compute Tomography Dual Photon Absorptlometry Total Body Bone Mineral Content Short Term Precision 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag New York Inc. 1988

Authors and Affiliations

  • R. Pacifici
    • 1
  • R. Rupich
    • 3
  • I. Vered
    • 1
  • K. C. Fischer
    • 2
  • M. Griffin
    • 3
  • N. Susman
    • 3
  • L. V. Avioli
    • 1
  1. 1.Division of Bone and Mineral Diseases, Department of MedicineThe Jewish Hospital of St. Louis, Washington University Medical CenterSt. LouisUSA
  2. 2.Nuclear MedicineThe Jewish Hospital of St. Louis, Washington University Medical CenterSt. LouisUSA
  3. 3.Radiology DepartmentThe Jewish Hospital of St. Louis, Washington University Medical CenterSt. LouisUSA

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