Minim Invasive Neurosurg 2003; 46(1): 5-10
DOI: 10.1055/s-2003-37967
Original Article
OriginalArticle
© Georg Thieme Verlag Stuttgart · New York

Image-Guided Stereotaxy in the Interventional MRI

E.  Samset1 , H.  Hirschberg2
  • 1The Interventional Centre, The National Hospital of Norway, University of Oslo, Norway
  • 2Department of Neurosurgery, The National Hospital of Norway, University of Oslo, Norway
This study was partly founded by a grant from Norsk Parkinsonforening and from the Norwegian Research Council. We acknowledge the contributions from Anne Talsma and Marius Kintel in programming MR interface libraries and computer graphics routines. We also acknowledge the support of GTPrototyper, for providing the laser sintered skull.DisclosureES and HH are listed as co-inventors in a pending international patent application for the mechanical positioning tool and the accompanying direct targeting software solution described in this paper.
Further Information

Publication History

Publication Date:
17 March 2003 (online)

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Abstract

Background: Stereotactic procedures employing frame-based systems and utilizing pre-operative MR or CT have several shortcomings such as long procedure time, patient discomfort and transport, poor fail-safe capabilities and targeting inaccuracies due to brain shift. Conducting all procedural steps in an interventional MRI has the potential of alleviating some of these deficiencies.

Methods: A stereotactic system consisting of a skull-mounted mechanical positioning device and customized navigation software has been developed. The accuracy of this system was tested within an interventional MRI employing a skull phantom.

Results: The mean distance between the targets hit and the planned target coordinates was 0.70 mm ± 0.3 mm with a maximum distance of 1.3 mm.

Interpretation: The results indicate that the proposed stereotactic system can be used for stereotactic procedures in the interventional MRI.

E. Samset,M.Sc. 

The Interventional Centre · Rikshospitalet

0027 Oslo

Norway ·

Phone: +47-23-070-111

Fax: +47-23-070-110

Email: eigil.samset@klinmed.uio.no