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Journal of Biomedical Optics

Lower body kinematics evaluation based on a multidirectional four-dimensional structured light measurement
Author(s): Janusz Lenar; Marcin Witkowski; Vincenzo Carbone; Sjoerd Kolk; Marcin Adamczyk; Robert Sitnik; Marjolein van der Krogt; Nico Verdonschot
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Paper 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.

Paper Details

Date Published: 30 May 2013
PDF: 14 pages
J. Biomed. Opt. 18(5) 056014 doi: 10.1117/1.JBO.18.5.056014
Published in: Journal of Biomedical Optics Volume 18, Issue 5
Show Author Affiliations
Janusz Lenar, Warsaw Univ. of Technology (Poland)
Marcin Witkowski, Warsaw Univ. of Technology (Poland)
Vincenzo Carbone, Univ. Twente (Netherlands)
Sjoerd Kolk, Radboud Univ. Nijmegen Medical Ctr. (Netherlands)
Marcin Adamczyk, Warsaw Univ. of Technology (Poland)
Robert Sitnik, Warsaw Univ. of Technology (Poland)
Marjolein van der Krogt, Univ. Twente (Netherlands)
Nico Verdonschot, Univ. Twente (Netherlands)

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