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Reconstruction de la cinématique 3D du genou de patients durant les activités de la vie quotidienne

English title Reconstruction of patients'3D knee kinematics in daily life conditions
Applicant Aminian Kamiar
Number 120136
Funding scheme Project funding (Div. I-III)
Research institution Lab. de mesure et d'analyse des mouvements EPFL - STI - LMAM
Institution of higher education EPF Lausanne - EPFL
Main discipline Information Technology
Start/End 01.09.2008 - 31.08.2011
Approved amount 259'569.00
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All Disciplines (2)

Information Technology

Keywords (6)

Knee 3D kniematics; Soft tissue artefact compensation; Kniematic sensors; BI-PLANES FLUOROSCY; Knee 3D kinematics; Kinematic sensors

Lay Summary (English)

Lay summary
Presently the most significant source of error for 3D kinematics reconstruction of underlying bones, using sensors placed on the skin, is the soft tissue artifact (STA). Based bi-plane fluoroscopy and Roentgen Sterephotogrammetric Analysis (RSA), semi invasive bone kinematics reconstruction is presently available.
In this project our objective is to design an ambulatory system using body fixed inertial sensors able to compensate STA in order to reconstruct 3D knee orientation accurately from recorded signals during daily life conditions. In order to reach this objective we aim: 1) to record knee kinematics directly by RSA technique without implant or inserted tantalum beads, 2) to devise a new 3D knee orientation reconstruction model based on skin markers by compensating STA from markers’ position, 3) to design a new STA compensation model for inertial sensors placed on skin or on fixation plates in order to obtain accurate 3D knee orientation in daily conditions and 4) to validate the efficiency of the methods in patients before and after knee arthroplasty.
This research will be divided in two phases: The first phase (in laboratory environment) will include STA assessment and modeling, STA compensation and bone tracking algorithm development by using optoelectronic motion capture (VICON system), bi-plane fluoroscopy and RSA. In a second phase, which targets “in field” monitoring and daily-life conditions, the new STA compensation model will be further developed to be implemented with miniature inertial sensors (accelerometers and gyroscopes) fixed on skin or attached using fixation plates.
This project will provide two new complementary and non-invasive methods to reconstruct the 3D knee orientation accurately. The first one will use RSA and bone motion tracking “in lab”. The second, usable in daily environment, will provide an ambulatory technique where STA error is compensated. This will be of major importance, technically and medically, as it will allow for a truly objective outcome evaluation of patient treatment in orthopaedic surgery, rehabilitation, neurology, sports medicine etc… by considering the actual movement of the bones during daily life conditions or defined motor task.
Direct link to Lay Summary Last update: 21.02.2013

Responsible applicant and co-applicants



Bi-planar 2D-to-3D registration in fourier domain for stereoscopic X-Ray motion tracking
Zosso D, Le Callennec B, Cuadra MB, Aminian K, Jolles BM, Thiran J-P (2008), Bi-planar 2D-to-3D registration in fourier domain for stereoscopic X-Ray motion tracking, in Progress in Biomedical Optics and Imaging - Proceedings of SPIE, 6914.

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
International Society of Biomechanics (ISB) congress XXIII, Barré A, Thiran J.P, Jolles B, Theumann N, Boulos K, Aminian K, Effects of the global soft tissue deformation on knee kinematics during walking. 03.07.2011 Brussels, Belgium
International Society of Biomechanics (ISB) congress XXIII, Tersi L, Barré A, Fantozzi S, Aminian K Stagni R, Quantification of the performance of mono- and bi-planar 3d fluoroscopy compared to marker-based RSA 03.07.2011 Brussels, Belgium
2nd International RSA Meeting: Barré A, Thiran J.P, Theumann N, Jolles B, Aminian K, Semi-automatic segmentation method for roentgen fluoroscopic stereophotogrammetric analysis. 06.04.2011 Leiden, The Netherlands
18th Annual General Meeting of the European Society of Movement Analysis in Adults and Children (ESMAC): A. Barré, R. Aissaoui, J. Favre, B. M. Jolles, J.P. Thiran, N. Theumann, K. Aminian, Geometric distribution of the soft tissue deformation during tre 17.09.2009 London, UK

Knowledge transfer events

Active participation

Title Type of contribution Date Place Persons involved

Communication with the public

Communication Title Media Place Year
Talks/events/exhibitions Journée de la recherche de l’EPFL, Kiosque d’analyse du mouvement. Western Switzerland 29.05.2010

Associated projects

Number Title Start Funding scheme
137940 Soft tissue artifact compensation model for accurate estimation of knee orientation 01.10.2011 Project funding (Div. I-III)