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Multislice CT-image-guided endoscopic sinus surgery using an electromagnetic tracking system.

P Reittner1, M Tillich, W Luxenberger

  • 1Department of Radiology, Karl Franzens Medical School and University Hospital Graz, Auenbruggerplatz 9, 8036 Graz, Austria. pia.reittner@kfunigraz.ac.at

European Radiology
|March 1, 2002
PubMed
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This study found computer-assisted electromagnetic tracking highly accurate for endoscopic sinus surgery. The Insta Trak System offers practical, efficient navigation for ENT surgeons.

Area of Science:

  • Medical Imaging
  • Surgical Navigation
  • Otolaryngology

Background:

  • Endoscopic sinus surgery (ESS) requires precise navigation.
  • Minimally invasive techniques demand advanced guidance systems.
  • Computer-assisted surgery aims to improve accuracy and safety.

Purpose of the Study:

  • To evaluate the practicability and accuracy of computer-assisted multislice CT-guided frameless electromagnetic tracking for ESS.
  • To assess the performance of the Insta Trak System in real-time surgical navigation.

Main Methods:

  • Eighty-two patients with paranasal sinus diseases underwent ESS using the Insta Trak System.
  • Multislice CT scans were acquired and transferred to the guidance system.
  • Accuracy was measured using visual landmarks and system-calculated root mean square (RMS) values.

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Main Results:

  • The system demonstrated high accuracy in displaying the instrument tip's position relative to anatomical structures (average accuracy: 0.70 +/- 0.40 mm).
  • Mean RMS values were 0.40 +/- 0.20 mm.
  • The Insta Trak System provided valuable image-based information during surgery.

Conclusions:

  • Computer-assisted multislice CT-guided frameless electromagnetic tracking is a practicable and efficient tool for ENT surgery.
  • The Insta Trak System offers high accuracy for intraoperative navigation in endoscopic sinus surgery.
  • This technology enhances the surgeon's ability to navigate complex sinus anatomy.