Gravity center estimation for evaluation of standing whole body compensation using virtual barycentremetry based on biplanar slot-scanning stereoradiography - validation by simultaneous force plate measurement
Autor: | Hasegawa, Kazuhiro, Amabile, Celia, Nesme, Matthieu, Dubousset, Jean |
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Přispěvatelé: | Niigata Spine Surgery Center, EOSimaging, AnatoScope, Académie nationale de médecine |
Jazyk: | angličtina |
Rok vydání: | 2022 |
Předmět: |
030222 orthopedics
EOS®system Gravity center Reproducibility of Results Diseases of the musculoskeletal system Spine [INFO.INFO-GR]Computer Science [cs]/Graphics [cs.GR] Radiography 03 medical and health sciences Imaging Three-Dimensional 0302 clinical medicine Rheumatology RC925-935 Standing Position Humans Whole body standing alignment Orthopedics and Sports Medicine Force plate measurement Radionuclide Imaging Barycentremetry 030217 neurology & neurosurgery Research Article |
Zdroj: | BMC Musculoskeletal Disorders, Vol 23, Iss 1, Pp 1-13 (2022) BMC Musculoskeletal Disorders BMC Musculoskeletal Disorders, BioMed Central, 2022, 23 (1), ⟨10.1186/s12891-021-04948-5⟩ |
ISSN: | 1471-2474 |
Popis: | Background Whole body standing alignment (WBSA) in terms of biomechanics can be evaluated accurately only by referring the gravity line (GL) which lies on the gravity center (GC). Here, we introduce a method for estimating GL and simultaneous WBSA measurement using the EOS® imaging system and report on the reproducibility and reliability of the method. Methods A 3-dimensional (3D) avatar to estimate GC was created following three steps: 3D reconstruction of the bone based on EOS images; deformation into a generic morphotype (MakeHuman statistical model) before density integration with 3D rasterization of the full body into 1-mm3 voxels (the content of each voxel is considered homogeneous); computation of the density of all the voxels provides the center of mass, which can be projected onto the floor as the GC of the full body, providing the GL in relation to the WBSA. The repeatability, reproducibility, and accuracy of the estimated GC and body weight of the avatar were compared with clinical estimation using a force plate in healthy volunteers and patients with degenerative and deformative diseases. Results Statistical analyses of the data revealed that the repeatability and reproducibility of the estimation was high with intra-rater and inter-rater intraclass correlation coefficient. ≥0.999. The coordinate values of the GC and body weight estimation did not differ significantly between the avatar and force plate measurements, demonstrating the high accuracy of the method. Conclusion This new method of estimating GC and WBSA is reliable and accurate. Application of this method could allow clinicians to quickly and qualitatively evaluate WBSA with GL with various spinal malalignment pathologies. |
Databáze: | OpenAIRE |
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