Medical and Biological Engineering and Computing

, Volume 30, Issue 6, pp 569–575 | Cite as

Effect of radiographic landmark identification errors on the accuracy of three-dimensional reconstruction of the human spine

  • B. André
  • J. Dansereau
  • H. Labelle
Medical Physics and Imaging

Abstract

In three-dimensional reconstruction of the human spine obtained from stereoradiographic setpus (two radiographs or more), it is extremely difficult to identify exactly the same landmarks on all radiographs. The effect of these identification errors was investigated with simulations made on points of known three-dimensional co-ordinates and compared with three-dimensional reconstructions of real spines obtained with the direct linear transformation algorithm. Results showed that radiographic identification errors of up to 2 mm were common, causing reconstruction errors of up to 5mm. These reconstruction errors may be noticed in the form of geometrical inaccuracies in the graphical representation of three-dimensional reconstructions of the spine. Successive displacements were then imposed on image point co-ordinates to minimise the identification error and increase the reconstruction accuracy. The improvement on the three-dimensional reconstruction results was negligible. Three-dimensional reconstructions obtained from three radiographs were also investigated. They showed slightly more accurate reconstructions than those obtained from two radiographs. However, the increase of X-ray exposure on the patient may not be worthwhile.

Keywords

Accuracy Landmarks Reconstruction Spine Stereoradiography 

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References

  1. André, B., Dansreau, J. andLabelle, H. (1990) Geometric evaluation of the three-dimensional reconstruction of the spine from different vertical stereoradiographic setups. Proc. Canadian Soc. of Mech. Eng. Forum, Toronto, Canada, 55–59.Google Scholar
  2. André, B. andDansereau, J. (1991) Effect of a third radiograph on the three-dimensional reconstruction accuracy of the human spine. Proc. Int. Symp. on Three-Dimensional Analysis of Human Movement, Montréal, Canada, 23–26.Google Scholar
  3. Brown, R. H., Burstein, A. H., Nash, C. L. andSchock, C. C. (1976) Spinal analysis using a three-dimensional radiographic technique.J. Biomech.,9, 355–365.CrossRefGoogle Scholar
  4. Dansereau, J. andStokes, I. A. F. (1988) Measurement of the three-dimensional shape of the rib cage,,21, 893–901.CrossRefGoogle Scholar
  5. DeSmet, A. A., Tarlton, M. A., Cook, L. T., Berridge, A. S. andAsher, M. A. (1983) The top view for analysis of scoliosis progression.Radiol.,147, 369–381.Google Scholar
  6. Hindmarsh, J., Larsson, J. andMattsson, O. (1980) Analysis of changes in the scoliotic spine using a three-dimensional radiographic technique.J. Biomech.,12, 279–290.CrossRefGoogle Scholar
  7. Kling, T. F., Cohen, M. J., Lindseth, R. E. andPaul de Rosa, G. (1990) Digital radiography can reduce scoliosis X-ray exposure.Spine,15, 880–885.Google Scholar
  8. Kratky, V. (1975) Analytical programmetry in scoliosis.Photogrammetria,31, 195–210.CrossRefGoogle Scholar
  9. Marzan, G. T. (1976) Rational design for close-range photogrammetry. Ph.D. Dissertation, Department of Civil Engineering, University of Illinois at Urbana-Champaign, USA.Google Scholar
  10. Olsson, T. H., Selvik, G. andWillner, S. (1976) Kinematic of spinal fusion.Invest. Radiol.,11, 202–209.Google Scholar
  11. Pearcy, M. J. (1985) Stereo radiography of lumbar spine.Acta Orthop. Scand.,56, Suppl. 212, 1–49.MathSciNetGoogle Scholar
  12. Plamondon, A. (1989) Validation d'une méthode stéréoradiographique pour l'étude des déplacements intervertébraux lombaires. Ph.D. Dissertation, Department of Physical Education, University of Montréal, Canada.Google Scholar
  13. Rab, G. T. andChao, E. Y. S. (1977) Verification of roentgenographic landmarks in the lumbar spine.Spine,2, 287–293.Google Scholar
  14. Stokes, I. A. F., Medlicott, P. A. andWilder, D. G. (1980) Measurement of movement in painful intervertebral joints.Med. & Biol. Eng. & Comput.,18, 694–700.CrossRefGoogle Scholar
  15. Stokes, I. A. F., Bigalow, L. C. andMoreland, M. S. (1987) Three-dimensional spinal curvature in idiopathic scoliosis.J. Orthop. Res.,5, 102–113.CrossRefGoogle Scholar
  16. Wolf, P. R. (1983)Elements of photogrammetry, 2nd edn. McGraw Hill, 559–571.Google Scholar
  17. Wood, G. A. andMarshall, R. N. (1986) The accuracy of DLT extrapolation in three-dimensional film analysis.J. Biomech.,19, 781–785.CrossRefGoogle Scholar

Copyright information

© IFMBE 1992

Authors and Affiliations

  • B. André
    • 1
    • 2
  • J. Dansereau
    • 1
    • 2
  • H. Labelle
    • 2
  1. 1.Département de Génie MécaniqueÉcole PolytechniqueMontréalCanada
  2. 2.Laboratoire d'Étude du Mouvement, Centre de RechercheHôpital Sainte-JustineMontréalCanada

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