Research Papers: Imaging

Lower body kinematics evaluation based on a multidirectional four-dimensional structured light measurement

[+] Author Affiliations
Janusz Lenar, Marcin Witkowski, Marcin Adamczyk, Robert Sitnik

Warsaw University of Technology, Institute of Micromechanics and Photonics, Division Photonics Engineering, Faculty of Mechatronics, ul. Św. Andrzeja Boboli 8, 02-525 Warsaw, Poland

Vincenzo Carbone

University of Twente, MIRA—Institute for Biomedical Technology and Technical Medicine, Laboratory of Biomechanical Engineering, Postbus 217, 7500 AE Enschede, The Netherlands

Sjoerd Kolk

Radboud University Medical Centre, Department of Rehabilitation, Nijmegen Centre for Evidence Based Practice, Postbus 9101, 6500 HB Nijmegen, The Netherlands

Marjolein van der Krogt

University of Twente, MIRA—Institute for Biomedical Technology and Technical Medicine, Laboratory of Biomechanical Engineering, Postbus 217, 7500 AE Enschede, The Netherlands

Research Institute MOVE, Department of Rehabilitation Medicine, VU University Medical Center, PO Box 7057, 1007 MB Amsterdam, The Netherlands

Nico Verdonschot

University of Twente, MIRA—Institute for Biomedical Technology and Technical Medicine, Laboratory of Biomechanical Engineering, Postbus 217, 7500 AE Enschede, The Netherlands

Radboud University Medical Centre, Department of Orthopaedics, Nijmegen Centre for Evidence Based Practice, Orthopaedic Research Laboratory, Postbus 9101, 6500 HB Nijmegen, The Netherlands

J. Biomed. Opt. 18(5), 056014 (May 30, 2013). doi:10.1117/1.JBO.18.5.056014
History: Received January 10, 2013; Revised April 10, 2013; Accepted April 11, 2013
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Abstract.  We report on a structured light-scanning system, the OGX|4DSCANNER, capable of capturing the surface of a human body with 2 mm spatial resolution at a 60 Hz frame-rate. The performance of modeling the human lower body dynamics is evaluated by comparing the system with the current gold standard, i.e., the VICON system. The VICON system relies on the application of reflective markers on a person’s body and tracking their positions in three-dimensional space using multiple cameras [optical motion capture (OMC)]. For the purpose of validation of the 4DSCANNER, a set of “virtual” markers was extracted from the measured surface. A set of musculoskeletal models was built for three subjects based on the trajectories of real and virtual markers. Next, the corresponding models were compared in terms of joint angles, joint moments, and activity of a number of major lower body muscles. Analyses showed a good overall agreement of the modeling outcome. We conclude that the 4DSCANNER within its limitations has the potential to be used in clinical gait analysis instead of optical marker-based systems. The advantage of the 4DSCANNER over OMC solutions is that it does not burden patients with time-consuming marker application. This study demonstrates the versatility of this measurement technique.

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© 2013 Society of Photo-Optical Instrumentation Engineers

Citation

Janusz Lenar ; Marcin Witkowski ; Vincenzo Carbone ; Sjoerd Kolk ; Marcin Adamczyk, et al.
"Lower body kinematics evaluation based on a multidirectional four-dimensional structured light measurement", J. Biomed. Opt. 18(5), 056014 (May 30, 2013). ; http://dx.doi.org/10.1117/1.JBO.18.5.056014


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