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Validity of the EOS-determined pelvic parameters and orientation with pelvic positional variation: a phantom study
Jung-Taek Kim1, Dong Hoon Lee2, Han-Dong Lee1
1Department of Orthopedic Surgery, Ajou University School of Medicine, Ajou University Medical Center, 164, World cup-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do, 16499, Republic of Korea.
Scientific Reports
|May 18, 2021
Summary
The EOS imaging system provides accurate and precise 3D pelvic measurements. While generally reliable across various pelvic orientations, sacral slope measurements may be influenced by positional variations.
Area of Science:
- Medical Imaging
- Orthopedics
- Biomechanical Engineering
Background:
- The EOS system offers simultaneous orthogonal imaging for 3D skeletal reconstructions.
- Accurate 3D pelvic positioning is crucial in orthopedic assessments.
- The validity of EOS imaging for pelvic parameters requires further investigation.
Purpose of the Study:
- To evaluate the trueness and precision of EOS imaging for pelvic parameters and orientation.
- To determine if pelvic orientation affects EOS measurements.
- To validate EOS system for 3D pelvic analysis.
Main Methods:
- Utilized a custom-made pelvic phantom with known orientation.
- Measured anterior pelvic plane orientation and pelvic parameters using the EOS system.
- Compared EOS measurements with true phantom values across various positions.
Main Results:
- EOS demonstrated high accuracy and reliability for most pelvic parameters and 3D orientation.
- Measurement errors for pelvic incidence, spinopelvic tilt, and sacral slope were within acceptable ranges.
- Significant correlation found between sacral slope measurement errors and pelvic positional variations (flexion, obliquity, rotation).
Conclusions:
- The EOS system is a valid tool for accurate and reliable 3D pelvic measurements, even with positional variations.
- Positional variations in pelvic orientation can impact the precision of sacral slope measurements.
- Further research may refine sacral slope measurements in EOS imaging.
