A direction space interpolation technique for calibration of electromagnetic surgical navigation systems

Xiaohui Wu, Russell Taylor

Research output: Contribution to journalConference article


A new generation of electromagnetic (EM) navigation systems with extremely compact sensors have great potential for clinical applications requiring that surgical devices be tracked within a patient's body. However, electromagnetic field distortions limit the accuracy of such devices. Further, the errors may be sensitive both to position and orientation of EM sensors within the field. This paper presents a computationally efficient method for in-situ 5 DOF calibration of the basic sensors of a typical EM system (Northern Digital's Aurora), and presents preliminary results demonstrating an improvement of approximately 2.6 : 1 positional accuracy and 1.6 : 1 for orientation even when the sensors are moved through arbitrary orientation changes. This work represents one step in a larger effort to understand the field distortions associated with these systems and to develop effective and predictable calibration and registration strategies for their use in stereotactic image-guided interventions.

Original languageEnglish (US)
Pages (from-to)215-222
Number of pages8
JournalLecture Notes in Computer Science
Issue numberPART 2
StatePublished - Dec 1 2003
EventMedical Image Computing and Computer-Assisted Intervention, MICCAI 2003 - 6th International Conference Proceedings - Montreal, Que., Canada
Duration: Nov 15 2003Nov 18 2003


ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science(all)

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