title: Clinical factors affecting the accuracy of a CT-based active infrared navigation system.
abstract: BACKGROUND
  Computer-assisted navigation technology has been widely used during spine surgery; however, the desired accuracy cannot be easily obtained and sustained. Our goal was to determine whether and how clinical factors affect the accuracy of a CT-based active infrared navigation system.
  
  
  METHODS
  Using the Sawbone model, we recorded the clinical accuracy of the navigation system, based on several clinical statuses.
  
  
  RESULTS
  Clinical accuracy may change when the height or angle of the bed is changed. Within the visible area of the camera, the nearer the distance between the camera and the model, the better the clinical accuracy. The clinical accuracy of the CT-based active infrared navigation system may decrease due to exposure to shadowless lamps.
  
  
  CONCLUSIONS
  The clinical accuracy of the CT-based active infrared navigation system may be influenced by the clinical status of shadowless lamps, different distances between the camera and model and different postures of the surgical bed. Copyright © 2015 John Wiley & Sons, Ltd.
authors.affiliation: Department of Spine Surgery, Beijing Jishuitan Hospital, Beijing, People's Republic of China.
authors.forename: Yajun
authors.identifier: http://orcid.org/0000-0002-0670-6261
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Department of Spine Surgery, Beijing Jishuitan Hospital, Beijing, People's Republic of China.
authors.forename: Jingwei
authors.initials: J
authors.lastname: Zhao
authors.affiliation: Department of Spine Surgery, Beijing Jishuitan Hospital, Beijing, People's Republic of China.
authors.forename: Mingxing
authors.initials: M
authors.lastname: Fan
authors.affiliation: Department of Epidemiology, Beijing Jishuitan Hospital, Beijing, People's Republic of China.
authors.forename: Yanwei
authors.initials: Y
authors.lastname: Lv
authors.affiliation: School of Biological Science and Medical Engineering, Beihang University, Beijing, People's Republic of China.
authors.forename: Wenyong
authors.initials: W
authors.lastname: Liu
authors.affiliation: Department of Spine Surgery, Beijing Jishuitan Hospital, Beijing, People's Republic of China.
authors.forename: Wei
authors.initials: W
authors.lastname: Tian
mesh_terms: D006801:Humans; D007259:Infrared Rays; D025321:Surgery, Computer-Assisted; D014057:Tomography, X-Ray Computed
keywords: clinical accuracy; computer-assisted orthopaedic surgery (CAOS); navigation; spine