gms | German Medical Science

57. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie e. V. (DGNC)
Joint Meeting mit der Japanischen Gesellschaft für Neurochirurgie

Deutsche Gesellschaft für Neurochirurgie (DGNC) e. V.

11. bis 14.05.2006, Essen

Evaluation of the optic nerve in sellar and parasellar lesion using three-dimensional cycled Fast Imaging Employing Steady-state Acquisition (FIESTA-C)

Meeting Abstract

  • corresponding author T. Yamashita - Department of Neurosurgery, Sapporo Medical University, Sapporo, Japan
  • T. Mikami - Department of Neurosurgery, Sapporo Medical University, Sapporo, Japan
  • Y. Minamida - Department of Neurosurgery, Sapporo Medical University, Sapporo, Japan
  • T. Baba - Department of Neurosurgery, Sapporo Medical University, Sapporo, Japan
  • K. Houkin - Department of Neurosurgery, Sapporo Medical University, Sapporo, Japan

Deutsche Gesellschaft für Neurochirurgie. Japanische Gesellschaft für Neurochirurgie. 57. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie e.V. (DGNC), Joint Meeting mit der Japanischen Gesellschaft für Neurochirurgie. Essen, 11.-14.05.2006. Düsseldorf, Köln: German Medical Science; 2006. DocP 04.56

Die elektronische Version dieses Artikels ist vollständig und ist verfügbar unter: http://www.egms.de/de/meetings/dgnc2006/06dgnc273.shtml

Veröffentlicht: 8. Mai 2006

© 2006 Yamashita 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

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Objective: The aim of this study was to assess the value of FIESTA-C imaging for visualization of the optic nerve pathway. The exact relationship between the tumour and the cranial nerves are very important for preoperative information. In patients with sellar and parasellar tumours, identification of the optic nerve will contribute to preservation during their surgery. FIESTA is the evolution of imaging of steady-state free procession to its perfect form. It generates T2/T1 contrast because of its short repetition time (TR) and the symmetrical and balanced gradient around the echo time (TE). Although, in sellar and parasellar lesion, conventional FIESTA was poor visualization of surrounding structures because of unstable magnetic field. 3D cycled FIESTA (FIESTA-C) was improved to remove artifacts and enable to evaluate the region.

Methods: Twelve consecutive patients with sellar and parasellar tumours underwent FIESTA-C sequence after contrast medium administration. We evaluated compression findings and visual field disorder pattern. Moreover we measured the cross-section of the optic nerve in the carotid cistern, and compared the atrophic side and non-atrophic side, which was evaluated by ophthalmoscopy. All examination were performed with a 1.5T scanner (Signa Infinity Excite; GE Medical Systems Milwaukee, Wisc., USA) using an 8 channel head coil. FIESTA-C was performed using the following parameters: TE=1.63 ms, TR=5.30ms, FA=65, FOV=14×14 cm.

Results: Intensity of all tumours increased on FIESTA-C imaging of the contrast enhancement, and the optic nerves were distinguished from tumour distinctly. In addition a status of the optic nerve in FIESTA-C reflected visual field disorders pattern well and was correspond to it with perioperative findings. The cross-section of the atrophic side was less than non-atrophic side statistically.

Conclusions: FIESTA-C sequence was useful for demonstration of the optic nerve status in sellar and parasellar tumours.