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- Title
Is There Any Use? Validity of Rasterstereography Compared to EOS 3D Imaging in Patients With Degenerative Disc Disease.
- Authors
Wanke-Jellinek, Lorenz; Mehren, Christoph; Siepe, Christoph J.; Wiechert, Karsten
- Abstract
Introduction: The aim of the present study was to evaluate the validity of rasterstereography in patients with degenerative disc disease for frontal, sagittal, and transverse parameters. Previous studies comparing inter- and intraobserver reliability of rasterstereography exist in abundance and show a high intra- and interday reliability in healthy volunteers. However, there is lack of data comparing the validity of rasterstereography with conventional Xray imaging. We utilized the recently developed EOS imaging system (EOS Imaging, Paris, France) for accurate 3D spinal modeling and compared the measurement of spinal and pelvic parameters obtained by EOS to parameters obtained by rasterstereography. Material and Methods: Sixteen healthy individuals (female = 10) at the age between 25 and 88- yrs. with diagnosed degenerative disc disease were included. EOS Xray images were analyzed using the sterEOS software to determine the lumbar lordosis- (LL) and thoracic kyphosis (TK) angle as well as pelvic obliquity (PO) and pelvic axial rotation (PR). Patients received rasterstereographic measurements independently performed by a single operator on the same day as EOS imaging. Parameters obtained by EOS 3D imaging were compared to those obtained by rasterstereography. For data analysis we used Bland and Altman's Limit of Agreement (LOA) as well as Pearson correlation coefficient to compare accuracy of rasterstereography vs. EOS imaging. Results: LOA as well as Pearson correlation did not show any significant correlation between the two modalities for Lumbar Lordosis (LL) (R = 0.26), Pelvic Obliquity (PO) (R = -0.14) and Pelvic Axial Rotation (PR) (R = 0.05). The Thoracic Kyphosis (TK) angle showed the strongest correlation of all parameters evaluated (R = 0.57). Conclusion: For assessment of the respective parameters, rasterstereographic systems are no reliable substitute for Xray based imaging systems. EOS imaging was previously shown to provide reliable and accurate spinal modeling in the measurement of spinal parameters while using substantially lower levels of radiation than conventional Xray based imaging. Based on our results rasterstereographic imaging should be used with caution for evaluating spinal parameters.
- Publication
Global Spine Journal, 2018, Vol 8, p66S
- ISSN
2192-5682
- Publication type
Article
- DOI
10.1177/2192568218771030