gms | German Medical Science

55. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie e. V. (DGNC)
1. Joint Meeting mit der Ungarischen Gesellschaft für Neurochirurgie

Deutsche Gesellschaft für Neurochirurgie (DGNC) e. V.

25. bis 28.04.2004, Köln

Marker free referencing for neuronavigation: A new technique

Markerlose Referenzierung für die Neuronavigation: neue Technik für Patientenerfassung und -Tracking

Meeting Abstract

  • corresponding author Ulrich Hubbe - Abt. Allg. Neurochirurgie, Neurochirurgische Klinik, Neurozentrum, Albert-Ludwigs-Universität, Freiburg
  • I. Arapakis - Hals-Nasen-Ohren-Klinik, Albert-Ludwigs-Universität, Freiburg
  • V. Vougioukas - Abt. Allg. Neurochirurgie, Neurochirurgische Klinik, Neurozentrum, Albert-Ludwigs-Universität, Freiburg
  • M. Shah - Abt. Allg. Neurochirurgie, Neurochirurgische Klinik, Neurozentrum, Albert-Ludwigs-Universität, Freiburg
  • T. Freiman - Abt. Allg. Neurochirurgie, Neurochirurgische Klinik, Neurozentrum, Albert-Ludwigs-Universität, Freiburg
  • C. Scheiwe - Abt. Allg. Neurochirurgie, Neurochirurgische Klinik, Neurozentrum, Albert-Ludwigs-Universität, Freiburg

Deutsche Gesellschaft für Neurochirurgie. Ungarische Gesellschaft für Neurochirurgie. 55. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie e.V. (DGNC), 1. Joint Meeting mit der Ungarischen Gesellschaft für Neurochirurgie. Köln, 25.-28.04.2004. Düsseldorf, Köln: German Medical Science; 2004. DocDI.05.01

Die elektronische Version dieses Artikels ist vollständig und ist verfügbar unter: http://www.egms.de/de/meetings/dgnc2004/04dgnc0191.shtml

Veröffentlicht: 23. April 2004

© 2004 Hubbe et al.
Dieser Artikel ist ein Open Access-Artikel und steht unter den Creative Commons Lizenzbedingungen (http://creativecommons.org/licenses/by-nc-nd/3.0/deed.de). Er darf vervielf&aauml;ltigt, verbreitet und &oauml;ffentlich zug&aauml;nglich gemacht werden, vorausgesetzt dass Autor und Quelle genannt werden.


Gliederung

Text

Objective

There are several possibilities for referencing of a neuronavigation system. Until now pointer based referencing using preoperative implanted bone screws is golden standard for this procedure. Nevertheless skin fiducials worldwide are used for the majority of navigated interventions. There have been several attempts to overcome the intrinsic drawbacks of the use of skin fiducials. We present a new, marker free referencing system for neuronavigation without the need for rigid head fixation.

Methods

We used the Stryker Navigation System and the Face-Mask-Referencing and Tracking device in a cadaver study. The accuracy of face mask referencing and tracking was compared to bone screw based referencing with mayfield fixation. 50 measurements of accuracy during 5 referencing procedures of each of these systems were performed using 8 control markers (bone screw markers) implanted on the cadaver head.

Results

There is no need for additional imaging for neuronavigation as the system needs no markers either on the patient or on the data set. The face mask referencing and tracking device consists of a self adhesive single use foil with 31 LED fixed on it. After the mask is fixed to the patients face, the Stryker navigation system is able to do an automatic referencing to the calculated surface of the patient's 3-D-Dataset. Mayfield fixation is not necessary as the face mask can be used as a tracking device. The accuracy that was achievable with the face mask was 1.1 mm compared to 1.2 mm of bone screw referencing.

Conclusions

The Face-Mask-Referencing and Tracking device is easy to use and facilitates the preoperative preparation time by automatic referencing without fiducials on patient and image data set and without the need for rigid head fixation. Using our new device we could achieve an accuracy comparable to that of bone screw markers. We already used the system for ENT-Interventions and transsphenoidal pituitary gland surgery.