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Computer-Generated, Three-Dimensional Spine Model From Biplanar Radiographs: A Validity Study in Idiopathic Scoliosis
Joseph H Carreau1, Tracey Bastrom2, Maty Petcharaporn2
1Department of Orthopaedics, University of California, San Diego, 9500 Gilman Drive, San Diego, CA 92093, USA.
Spine Deformity
|December 9, 2016
Summary
SterEOS 3D software demonstrates excellent reproducibility for measuring idiopathic scoliosis (IS) spinal curves greater than 50 degrees. This 3D imaging system offers consistent measurements across all spinal planes, improving scoliosis assessment.
Area of Science:
- Orthopedics and Sports Medicine
- Radiology and Medical Imaging
- Biomedical Engineering
Background:
- Idiopathic scoliosis (IS) is a complex spinal deformity requiring accurate measurement for effective treatment.
- The SterEOS system reconstructs 3D spinal models from low-dose biplanar X-rays, but its performance in large IS curves needed validation.
Purpose of the Study:
- To assess the accuracy and reproducibility of 3D spinal measurements generated by SterEOS software.
- To compare 3D measurements with traditional 2D radiographic measurements in large IS curves.
Main Methods:
- EOS biplanar images from 30 IS patients with curves >50° were analyzed.
- Three observers performed repeated, blinded 2D and 3D (Full 3D and Fast 3D) measurements.
- Intra-class correlation coefficients and mean differences were calculated to assess reproducibility.
Main Results:
- Excellent average intra-class correlation coefficients were achieved for both 3D techniques (0.97) and 2D measures (0.93).
- SterEOS 3D techniques showed significantly lower measurement errors for some sagittal parameters.
- Consistent measurements of axial plane vertebral rotation were obtained with both 3D methods.
Conclusions:
- SterEOS 3D reconstruction software provides reproducible spinal deformity measurements in all 3 planes for curves >50°.
- Advancements in 3D scoliosis imaging, like SterEOS, are poised to enhance the understanding and management of IS.
