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EnglishAccurate knowledge of joint kinematics is fundamental for research and clinical purposes. Radiologic based joint kinematic estimation technique have been recently used to study intact joint in-vivo kinematics. Bi-planar methods are more accurate but expensive and invasive, while mono-planar ones are less reliable but more suitable for the clinical practice. The present work is a comparison of mono- and bi-planar fluoroscopic methods using the marker based Roentgen stereophotogrammetric analysis as gold-standard. Five repetitions of a simulated walking task with bone phantoms were analyzed. The dominant source of error for the bi-planar method was the longitudinal symmetry of the bones. The mono-planar technique was limited in the estimation of the out-of-plane pose parameters, but as good as bi-planar for the in-plane pose parameters. With error of the order of the millimeter and the degree, mono-planar fluoroscopy could be sufficient for clinical analysis, provided that it relies upon the most reliable information and avoiding the out-of-plane transaltion.
| Titolo: | QUANTIFICATION OF THE PERFORMANCE OF MONO- AND BI-PLANAR 3D FLUOROSCOPY COMPARED TO MARKER-BASED RSA |
| Autore/i: | TERSI, LUCA; Arnaud Barré; FANTOZZI, SILVIA; Kamiar Aminian; STAGNI, RITA |
| Autore/i Unibo: | |
| Anno: | 2011 |
| Titolo del libro: | Proceedings of ISB |
| Pagina iniziale: | 1 |
| Pagina finale: | 2 |
| Abstract: | Accurate knowledge of joint kinematics is fundamental for research and clinical purposes. Radiologic based joint kinematic estimation technique have been recently used to study intact joint in-vivo kinematics. Bi-planar methods are more accurate but expensive and invasive, while mono-planar ones are less reliable but more suitable for the clinical practice. The present work is a comparison of mono- and bi-planar fluoroscopic methods using the marker based Roentgen stereophotogrammetric analysis as gold-standard. Five repetitions of a simulated walking task with bone phantoms were analyzed. The dominant source of error for the bi-planar method was the longitudinal symmetry of the bones. The mono-planar technique was limited in the estimation of the out-of-plane pose parameters, but as good as bi-planar for the in-plane pose parameters. With error of the order of the millimeter and the degree, mono-planar fluoroscopy could be sufficient for clinical analysis, provided that it relies upon the most reliable information and avoiding the out-of-plane transaltion. |
| Data prodotto definitivo in UGOV: | 28-mag-2013 |
| Appare nelle tipologie: | 4.02 Riassunto (Abstract) |
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