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01.04.2010 | Head and Neck

Signal intensity change of the labyrinth in patients with surgically confirmed or radiologically diagnosed vestibular schwannoma on isotropic 3D fluid-attenuated inversion recovery MR imaging at 3 T

verfasst von: In Ho Lee, Hyung-Jin Kim, Won Ho Chung, Eunhee Kim, Jung Won Moon, Sung Tae Kim, Keon Ha Kim, Pyoung Jeon, Hong Sik Byun

Erschienen in: European Radiology | Ausgabe 4/2010

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Abstract

Objective

The purpose of this study was to evaluate the signal intensity (SI) change of the labyrinth in patients with vestibular schwannoma on isotropic 3D fluid-attenuated inversion recovery (FLAIR) imaging at 3 T.

Methods

Thirty-four patients with surgically confirmed or radiologically diagnosed vestibular schwannoma were included in this study. Retrospectively, we visually and quantitatively compared the SIs of the cochlea and vestibule on the affected side with those on the unaffected side. We also investigated whether there was correlation between the SI ratios (SIRs) of the labyrinth and the audiometric findings.

Results

On 3D FLAIR images, the SI of the cochlea and vestibule on the affected side was significantly increased in 97% (33/34) and 91% (31/34), respectively. While the SI of the cochlea was diffusely increased, that of the vestibule was only partially increased. Quantitative study also revealed statistically significantly higher SIRs of the cochlea (0.99 ± 0.29) and vestibule (0.73 ± 0.31) on the affected side, compared with the cochlea (0.47 ± 0.20) and vestibule (0.19 ± 0.10) on the unaffected side. There was no significant correlation of the SIRs of the labyrinth with the degree of hearing loss.

Conclusion

In patients with vestibular schwannoma, isotropic 3D FLAIR imaging is a useful method for the evaluation of the SI changes of the labyrinth.

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Titel: Signal intensity change of the labyrinth in patients with surgically confirmed or radiologically diagnosed vestibular schwannoma on isotropic 3D fluid-attenuated inversion recovery MR imaging at 3 T
verfasst von: In Ho Lee
Hyung-Jin Kim
Won Ho Chung
Eunhee Kim
Jung Won Moon
Sung Tae Kim
Keon Ha Kim
Pyoung Jeon
Hong Sik Byun
Publikationsdatum: 01.04.2010
Verlag: Springer-Verlag
Erschienen in: European Radiology / Ausgabe 4/2010
Print ISSN: 0938-7994
Elektronische ISSN: 1432-1084
DOI: https://doi.org/10.1007/s00330-009-1626-9

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Signal intensity change of the labyrinth in patients with surgically confirmed or radiologically diagnosed vestibular schwannoma on isotropic 3D fluid-attenuated inversion recovery MR imaging at 3 T