The influence of distance on registration in ISO-C-3D navigation: A source of error in ISO-C-3D navigation

M. Citak, D. Kendoff, T. Wanich, A. Pearle, R. Singhai, C. Krettek, T. Hüfner

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Computer-assisted treatments have become increasingly common. Consequently, there is an increased desire for navigation methods with simplified workflow. Anatomic-based pair-point registration is often mentioned as a source of error. Alternatively, the use of preoperatively implanted markers for registration remains complex. The self-acting registration of Iso-C-3D at the moment of data acquisition can reduce essential errors. The aim of this study was to evaluate the effect of reference placement on accuracy, and to determine the maximum acceptable distance between the reference and a given isocentre. This study demonstrates the interdependence of the reference distance on the region of interest (ROI). The mean error of registration amounts to 0.04 mm (0.04-0.05 mm) up to a distance of 200 mm and beyond 0.25 mm (0.24-0.26) for distances beyond 200 mm. The accuracy was significantly lower (p<0.0001) with a distance more than 200 mm. For optimal accuracy when utilizing navigation for pelvic and long bone surgery, the reference base should not been placed at a distance more than 200 mm from the isocentre of interest.

Original languageEnglish (US)
Pages (from-to)473-478
Number of pages6
JournalTechnology and Health Care
Issue number6
StatePublished - Dec 15 2006


  • Computer assisted orthopaedic surgery
  • Iso-C 3D navigation
  • Precision
  • Reference base
  • Registration

ASJC Scopus subject areas

  • Biophysics
  • Bioengineering
  • Biomaterials
  • Information Systems
  • Biomedical Engineering
  • Health Informatics


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