Multisegment Kinematics of the Spinal Column: Soft Tissue Artifacts Assessment
| Autor: | Kei Masani, Hossein Rouhani, Sara Mahallati, Milos R. Popovic, Richard Preuss |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Adult
Male 0206 medical engineering Biomedical Engineering 02 engineering and technology Bending Kinematics Sensitivity and Specificity Zygapophyseal Joint 03 medical and health sciences 0302 clinical medicine Imaging Three-Dimensional Physiology (medical) medicine Humans Range of Motion Articular Simulation Physics Observational error Reproducibility of Results Image Enhancement 020601 biomedical engineering Trunk Spinal column Sagittal plane Spine Transverse plane medicine.anatomical_structure Coronal plane Female Anatomic Landmarks Artifacts 030217 neurology & neurosurgery Biomedical engineering |
| Zdroj: | Journal of biomechanical engineering. 138(7) |
| ISSN: | 1528-8951 |
| Popis: | A major challenge in the assessment of intersegmental spinal column angles during trunk motion is the inherent error in recording the movement of bony anatomical landmarks caused by soft tissue artifacts (STAs). This study aims to perform an uncertainty analysis and estimate the typical errors induced by STA into the intersegmental angles of a multisegment spinal column model during trunk bending in different directions by modeling the relative displacement between skin-mounted markers and actual bony landmarks during trunk bending. First, we modeled the maximum displacement of markers relative to the bony landmarks with a multivariate Gaussian distribution. In order to estimate the distribution parameters, we measured these relative displacements on five subjects at maximum trunk bending posture. Then, in order to model the error depending on trunk bending angle, we assumed that the error grows linearly as a function of the bending angle. Second, we applied our error model to the trunk motion measurement of 11 subjects to estimate the corrected trajectories of the bony landmarks and investigate the errors induced into the intersegmental angles of a multisegment spinal column model. For this purpose, the trunk was modeled as a seven-segment rigid-body system described using 23 reflective markers placed on various bony landmarks of the spinal column. Eleven seated subjects performed trunk bending in five directions and the three-dimensional (3D) intersegmental angles during trunk bending were calculated before and after error correction. While STA minimally affected the intersegmental angles in the sagittal plane ( |
| Databáze: | OpenAIRE |
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