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Shoulder bony landmarks location using the EOS® low-dose stereoradiography system: a reproducibility study

  • Anatomic Bases of Medical, Radiological and Surgical Techniques
  • Published:
Surgical and Radiologic Anatomy Aims and scope Submit manuscript

Abstract

Purpose

To investigate the reproducibility of shoulder bony landmarks location using the EOS® low-dose stereoradiography system, in order to validate this new tool for the study of gleno-humeral pseudo-kinematics.

Methods

An inter and intraobserver reproducibility study of shoulder bony landmarks location concerning 22 healthy volunteers. This study concerned the neutral position, arm at rest. Humerus and scapula were modeled with simple geometric shapes using specific software. Those shapes were positioned on A-P and lateral x-rays views. Images analysis of the 22 subjects was carried out three times (n r = 3), by two observers (n o = 2), for a total of n tot = 132 analyses.

Results

We obtained a very good reproducibility for the humeral head center and the diaphysis axis with 95% confidence interval (IC95%) inferior to 1.09 mm and 0.41°, respectively. The uncertainty was higher for the lateral and medial epicondyles. Regarding the scapular bony landmarks, we observed a good reproducibility for the tip of the coracoid process, the inferior glenoid rim, and the axillar border with a 95% confidence interval lower than 2.13, 2.91 mm, and 3.67°, respectively. The uncertainty was higher for the most postero-lateral point of the acromion and the superior glenoid rim.

Conclusion

Our analysis of the x-rays obtained with the EOS® low-dose stereoradiography system assessed the location reliability and reproducibility of specific scapular and humeral bony landmarks. This work opens the way to gleno-humeral pseudo-kinematics analysis using EOS® imaging system.

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Notes

  1. The EOS® imaging system results from a collaboration between LBM (Paris), LIO (Montreal), Saint-Vincent de Paul Hospital (Paris) and Biospace Instruments (Paris).

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The authors declare that they have no conflict of interest.

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Authors and Affiliations

  1. École Nationale Supérieure d’Arts et Métiers, Laboratoire de Biomécanique, 151 Boulevard de l’Hôpital, 75013, Paris, France

    Xavier Ohl, Claire Stanchina, Fabien Billuart & Wafa Skalli

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  1. Xavier Ohl
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  2. Claire Stanchina
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  3. Fabien Billuart
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  4. Wafa Skalli
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Correspondence to Xavier Ohl.

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Ohl, X., Stanchina, C., Billuart, F. et al. Shoulder bony landmarks location using the EOS® low-dose stereoradiography system: a reproducibility study. Surg Radiol Anat 32, 153–158 (2010). https://doi.org/10.1007/s00276-009-0566-z

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  • DOI: https://doi.org/10.1007/s00276-009-0566-z

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