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

Instrument induced artefacts in magnetic resonance imaging. An experimental study

Instrumentenbedingte Artefakte in der Kernspintomographie. Eine experimentelle Untersuchung

Meeting Abstract

  • corresponding author Dirk Freudenstein - Klinik für Neurochirurgie, Eberhard-Karls Universität, Tübingen
  • A. Mirwa - Klinik für Neurochirurgie, Eberhard-Karls Universität, Tübingen
  • T. Bauer - Klinik für Neurochirurgie, Eberhard-Karls Universität, Tübingen
  • R. Ritz - Klinik für Neurochirurgie, Eberhard-Karls Universität, Tübingen
  • M. Merkle - Klinik für Neurochirurgie, Eberhard-Karls Universität, Tübingen
  • F. Duffner - Klinik für Neurochirurgie, Eberhard-Karls Universität, Tübingen

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. DocP 09.95

The electronic version of this article is the complete one and can be found online at: http://www.egms.de/en/meetings/dgnc2004/04dgnc0378.shtml

Published: April 23, 2004

© 2004 Freudenstein et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by-nc-nd/3.0/deed.en). You are free: to Share – to copy, distribute and transmit the work, provided the original author and source are credited.


Outline

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Objective

Working within the magnetic field of an intraoperative magnetic resonance (MR) scanner requires specially designed surgical instruments. Aim of the present study was to glean materials which could be localised with MR imaging without disturbance of the image acquisition.

Methods

In a phantom and cadaver study, different materials (metal/ceramic) of various geometries were analysed regarding their magnetic characteristics within an open MR scanner (Magnetom open; Siemens, Erlangen, Germany). Several MR sequences were tested regarding image quality and time of acquisition.

Results

Among the studied materials, nitinol provides the best characteristics. It can be easily visualized by MRI without disturbing artefacts. Pickling and electro polishing further improves image quality. MR artefacts are highly dependent on the orientation of the material within the magnetic field, while the geometry of the cone end is irrelevant. A turbo spin echo (TSE) sequence (tse17_21b65.uhc; Siemens, Erlangen, Germany) provides the best image quality with lowest possible time of acquisition (42 seconds).

Conclusions

The magnetic characteristics and material processing are essential to obtain optimal display by MRI. Based on our data, pickled and electro polished nitinol turned out to be the ideal material for MR-compatible instruments.