Osteoporosis International

, Volume 16, Issue 8, pp 969–976 | Cite as

Three-dimensional X-ray absorptiometry (3D-XA): a method for reconstruction of human bones using a dual X-ray absorptiometry device

  • S. Kolta
  • A. Le Bras
  • D. Mitton
  • V. Bousson
  • J. A. de Guise
  • J. Fechtenbaum
  • J. D. Laredo
  • C. Roux
  • W. Skalli
Original Article

Abstract

Three-dimensional accurate evaluation of the geometry of the proximal femur may be helpful for hip fracture risk evaluation. The purpose of this study was to apply and validate a stereo-radiographic 3D reconstruction method of the proximal femur, using contours identification from biplanar DXA images. Twenty-five excised human proximal femurs were investigated using a standard DXA unit. Three-dimensional personalized models were reconstructed using a dedicated non-stereo corresponding contours (NSCC) algorithm. Three-dimensional CT-scan reconstructions obtained on a clinical CT-scan unit were defined as geometric references for the comparison protocol, in order to assess accuracy and reproducibility of the 3D stereo-radiographic reconstructions. The precision of a set of 3D geometric parameters (femoral-neck axis length, mid-neck cross-section area, neck-shaft angle), obtained from stereo-radiographic models was also evaluated. This study shows that the NSCC method may be applied to obtain 3D reconstruction from biplanar DXA acquisitions. Applied to the proximal femur, this method showed good accuracy as compared with high-resolution personalized CT-scan models (mean error = 0.8 mm). Moreover, precision study for the set of 3D parameters yielded coefficients of variation lower than 5%. This is the first study providing 3D geometric parameters from standard 2D DXA images using the NSCC method. It has good accuracy and reproducibility in the present study on cadaveric femurs. In vivo prospective studies are needed to evaluate its discriminating potential on hip fracture risk prediction.

Keywords

Accuracy 3D reconstruction Dual X-Ray absorptiometry Hip fracture risk Proximal femur Reproducibility 

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Copyright information

© International Osteoporosis Foundation and National Osteoporosis Foundation 2004

Authors and Affiliations

  • S. Kolta
    • 1
    • 6
  • A. Le Bras
    • 2
  • D. Mitton
    • 2
  • V. Bousson
    • 3
    • 4
  • J. A. de Guise
    • 5
  • J. Fechtenbaum
    • 1
  • J. D. Laredo
    • 3
    • 4
  • C. Roux
    • 1
  • W. Skalli
    • 2
  1. 1.Rheumatology DepartmentCochin Hospital, Assistance Publique, Hôpitaux de Paris–Université René DescartesParisFrance
  2. 2.Laboratoire de BioMécanique–ENSAM-CNRS UMR 8005ParisFrance
  3. 3.Radiology DepartmentLariboisière Hospital, Assistance Publique, Hôpitaux de ParisParisFrance
  4. 4.Laboratoire de Recherches OrthopédiquesCNRS UMR 7052ParisFrance
  5. 5.Laboratoire de recherche en Imagerie et OrthopédieMontréalCanada
  6. 6.Centre d’Evaluation des Maladies OsseusesHôpital Cochin AP-HPParisFrance

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