International Orthopaedics

, Volume 36, Issue 7, pp 1325–1331

The EOS™ imaging system and its uses in daily orthopaedic practice

Review Article

Abstract

Background

The EOS™ X-ray machine, based on a Nobel prize-winning invention in physics in the field of particle detection, is capable of a simultaneous capture of biplanar X-ray images by slot scanning of the whole body in an upright, physiological load-bearing position, using ultra-low radiation doses. The simultaneous capture of spatially calibrated anterioposterior and lateral images provides a three-dimensional (3D) surface reconstruction of the skeletal system using a special software. Parts of the skeletal system in X-ray images and 3D-reconstructed models appear in true 1:1 scale for size and volume, thus spinal and vertebral parameters, lower limb axis lengths and angles, as well as any relevant clinical parameters in orthopaedic practice can be very precisely measured and calculated. Visualisation of 3D reconstructed models in various views by sterEOS 3D software enables presentation of top view images to help analyse rotational conditions of lower limbs, joints and spine deformities in the horizontal plane, providing revolutionary novel possibilities in orthopaedic surgery, especially in spine surgery.

Approach and conclusions

Our department has been extensively using the very first commercially available EOS™ imaging system worldwide for routine orthopaedic diagnostics since June 2007. During this period of about 4.5 years, more than 5,700 standard examinations have been carried out, about a third of them in spine deformity cases and the rest in lower limb orthopaedic cases. In this mini-review, general principles and uses of this groundbreaking integrated orthopaedic solution is reviewed with a few highlighted examples from our own clinical practice.

References

  1. 1.
    The Nobel Prize in Physics (1992) Nobelprize.org. The official web site of the Nobel Prize. http://nobelprize.org/nobel_prizes/physics/laureates/1992/index.html. Accessed December 19, 2011
  2. 2.
    Charpak G (1981) La détection des particules. Recherche 128:1384–1396Google Scholar
  3. 3.
    Charpak G (1993) Electronic imaging of ionizing radiation with limited avalanches in gases. Rev Mod Phys 6:591–598CrossRefGoogle Scholar
  4. 4.
    Després P, Beaudoin G, Gravel P et al (2005) Evaluation of a full-scale gas microstrip detector for low-dose X-ray imaging. Nucl Instr Meth Phys Res A 536:52–60CrossRefGoogle Scholar
  5. 5.
    Dubousset J, Charpak G, Dorion I et al (2005) Le system EOS nouvelle imagerie osteo-articulaire basse dose en position debout. E-mémoire de l’Académie National de Chirugie 4:22–27Google Scholar
  6. 6.
    Dubousset J, Charpak G, Dorion I et al (2005) A new 2D and 3D imaging approach to musculoskeletal physiology and pathology with low-dose radiation and the standing position: the EOS system. Bull Acad Natl Med 189:287–297PubMedGoogle Scholar
  7. 7.
    Le Bras A, Laporte S, Mitton D et al (2002) 3D detailed reconstruction of vertebrae with low dose digital stereoradiography. Stud Health Technol Inform 91:286–290PubMedGoogle Scholar
  8. 8.
    Le Bras A, Laporte S, Mitton D et al (2003) A biplanar reconstruction method based on 2D and 3D contours: application to the distal femur. Comput Methods Biomech Biomed Engin 6:1–6CrossRefGoogle Scholar
  9. 9.
    Mitton D, Landry C, Véron S et al (2000) A 3D reconstruction method from biplanar radiography using non-stereocorresponding points and elastic deformable meshes. Med Biol Eng Comput 38:133–139PubMedCrossRefGoogle Scholar
  10. 10.
    Mitulescu A, Semaan I, De Guise JA et al (2001) Validation of the non-stereo corresponding points stereoradiographic 3D reconstruction technique. Med Biol Eng Comput 39:152–158PubMedCrossRefGoogle Scholar
  11. 11.
    Kalifa G, Charpak G, Maccia C et al (1998) Evaluation of a new low-dose digital x-ray device: first dosimetric and clinical result in children. Pediatr Radiol 28:557–561PubMedCrossRefGoogle Scholar
  12. 12.
    Than P, Szuper K, Somoskeöy S et al (2011) Geometrical values of the normal and arthritic hip and knee detected with the EOS imaging system. Int Orthop (SICOT). doi:10.1007/s00264-011-1403-7

Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  1. 1.Institute of Musculoskeletal Surgery, Department of Orthopaedic SurgeryUniversity of PécsPécsHungary
  2. 2.Orthopedic Surgery Department O., University of Southern DenmarkOdense University Hospital - Svenborg, SygehusOdenseDenmark

Personalised recommendations