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Updated: Jun 19, 2026
06:09
Measuring 3D In-vivo Shoulder Kinematics using Biplanar Videoradiography
Published on: March 12, 2021
Shoulder bony landmarks location using the EOS low-dose stereoradiography system: a reproducibility study
Xavier Ohl1, Claire Stanchina, Fabien Billuart
1Ecole Nationale Supérieure d'Arts et Métiers, Laboratoire de Biomécanique, 151 Boulevard de l'Hôpital, 75013, Paris, France. xohl@hotmail.com
Surgical and Radiologic Anatomy : SRA
|October 7, 2009
Summary
The EOS low-dose stereoradiography system reliably locates shoulder bony landmarks, validating its use for gleno-humeral pseudo-kinematics analysis. This imaging tool offers reproducible measurements for shoulder research.
Area of Science:
- Orthopedics
- Radiology
- Biomechanics
Background:
- Accurate landmark identification is crucial for analyzing shoulder joint mechanics.
- The EOS imaging system offers low-dose stereoradiography for skeletal assessment.
Purpose of the Study:
- To evaluate the reproducibility of shoulder bony landmark localization using the EOS system.
- To validate the EOS system for gleno-humeral pseudo-kinematics studies.
Main Methods:
- Inter- and intraobserver reproducibility study of 22 healthy volunteers.
- Modeling of humerus and scapula with geometric shapes on A-P and lateral X-rays.
- 132 total analyses performed by two observers, each repeating measurements three times.
Main Results:
- Very good reproducibility for humeral head center (IC95% < 1.09 mm) and diaphysis axis (< 0.41 degrees).
- Good reproducibility for coracoid process tip, inferior glenoid rim, and axillary border (IC95% < 2.13 mm, 2.91 mm, 3.67 degrees).
- Higher uncertainty noted for acromion and superior glenoid rim landmarks.
Conclusions:
- The EOS system demonstrates reliable and reproducible localization of key humeral and scapular bony landmarks.
- This validates the EOS imaging system as a suitable tool for gleno-humeral pseudo-kinematics analysis.
