title: Determination of repeatability of kinect sensor.
abstract: BACKGROUND
  The Kinect™ (Microsoft™, Redmond, WA) sensor, originally developed for gaming purposes, may have interesting possibilities for other fields such as posture and motion assessment. The ability of the Kinect sensor to perform biomechanical measurements has previously been studied and shows promising results. However, interday repeatability of the device is still not known.
  
  
  METHODS
  This study assessed the intra- and interday repeatability of the Kinect sensor compared with a standard stereophotogrammetric device during posture assessment for measuring segment lengths. Forty subjects took part in the study. Five motionless captures were performed in one session to assess posture. Data were simultaneously recorded with both devices.
  
  
  RESULTS
  Similar intraclass correlations coefficient (ICC) values were found for intraday (ICC=0.94 for the Kinect device and 0.98 for the stereophotogrammetric device) and interday (ICC=0.88 and 0.87, respectively) repeatability.
  
  
  CONCLUSIONS
  Results of this study suggest that a cost-effective, easy-to-use, and portable single markerless camera offers the same repeatability during posture assessment as an expensive, time-consuming, and nontransportable marker-based device.
authors.affiliation: 1 Laboratory of Anatomy, Biomechanics, and Organogenesis, Université Libre de Bruxelles , Brussels, Belgium .
authors.forename: Bruno
authors.initials: B
authors.lastname: Bonnechère
authors.forename: Victor
authors.initials: V
authors.lastname: Sholukha
authors.forename: Bart
authors.initials: B
authors.lastname: Jansen
authors.forename: Lubos
authors.initials: L
authors.lastname: Omelina
authors.forename: Marcel
authors.initials: M
authors.lastname: Rooze
authors.forename: Serge
authors.initials: S
authors.lastname: Van Sint Jan
mesh_terms: D000328:Adult; D000886:Anthropometry; D001530:Belgium; D001696:Biomechanical Phenomena; D003936:Diagnosis, Computer-Assisted / Q000295:instrumentation*; D005260:Female; D064368:Healthy Volunteers; D006801:Humans; D007596:Joints / Q000502:physiology*; D008297:Male; D008991:Monitoring, Physiologic / Q000295:instrumentation*; D010780:Photogrammetry / Q000295:instrumentation*; D004856:Postural Balance / Q000502:physiology*; D015203:Reproducibility of Results; D012494:Sampling Studies; D012984:Software; D055815:Young Adult