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Development and validation of a practical solution for detecting motion artefacts in the EOS X-ray system
Vanessa Vallesi1,2, Ganesh Shetty1, Michael Moll1
1Department of Radiology, Swiss Paraplegic Centre, Nottwil, CH, Switzerland.
Scientific Reports
|February 28, 2024
Summary
Motion artifacts (MA) in EOS imaging can mimic spinal pathologies. This study developed a method to detect MA, finding that 80-87.9% of patients had MA ≥ 1 mm, which was reduced with improved patient cooperation.
Area of Science:
- Medical Imaging
- Radiology
- Spinal Diagnostics
Background:
- The EOS™2D/3D system offers low-dose imaging for spinal assessment.
- Slow acquisition times (up to 25s) can lead to motion artifacts (MA).
- MA can be mistaken for pathologies like scoliosis, hindering diagnosis.
Purpose of the Study:
- To develop a method for detecting motion artifacts in EOS X-ray images.
- To quantify the prevalence and severity of MA in EOS imaging.
- To assess the impact of patient cooperation on reducing MA.
Main Methods:
- Retrospective analysis of EOS images from 40 patients.
- Utilized a radiopaque reference device to measure deviations caused by MA.
- Compared MA levels before and after specific instructions for patients to remain still.
Main Results:
- A significant proportion of patients exhibited MA ≥ 1 mm (80% frontal, 87.9% lateral).
- Repeat acquisitions with improved patient stillness showed significantly lower MA.
- The developed method provides a reliable way to detect MA.
Conclusions:
- A simple method effectively detects motion artifacts in EOS imaging.
- Reducing MA can improve the accuracy of spinal measurements.
- This technique may decrease misdiagnosis rates due to poor image quality.

