Usefulness of contrast-enhanced 3-dimensional T1-VISTA in the diagnosis of facial neuritis: Comparison with contrast-enhanced T1-TSE - 03/04/15
, Geon-Ho Jahng a, Eui Jong Kim b, Woo Suk Choi b, Kyung Mi Lee b, Sun Mi Kim cBienvenue sur EM-consulte, la référence des professionnels de santé.
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Summary |
Background and purpose |
Compared with 2-dimensional imaging, 3D-reformatted imaging is a valuable technique that offers improved anatomic accuracy with minimal flow artifact and thinner sections without gaps between slices. Our aim was to evaluate the usefulness of CE 3D T1-VISTA with fat suppression sequences compared with CE T1-TSE with fat suppression sequences in patients with facial neuritis.
Material and methods |
The study enrolled 32 consecutive patients who underwent IAC MR imaging for Bell's palsy. IAC MR scanning, including CE T1-VISTA and CE T1-TSE, was performed in all patients using a 3T scanner. The order of the scans was random. Signal intensity was measured at three segments (canalicular, labyrinthine, and anterior genu) of the facial nerve by drawing a ROI along the affected side and the normal side in each segment. We compared the quantitative CR of the two MR sequences with paired t-tests.
Results |
In all three segments, the lesion-to-normal contrast ratios on CE 3D T1-VISTA (canalicular: 2.32; labyrinthine: 2.22; anterior genu: 1.97) were greater than those on CE T1-TSE (canalicular: 2.17; labyrinthine: 1.72; anterior genu: 1.68). The labyrinthine and anterior genu segments had significantly higher lesion-to-normal contrast ratios on CE 3D T1-VISTA in patients with facial neuritis (labyrinthine: P<0.001; anterior genu: P=0.002).
Conclusion |
CE 3D T1-VISTA was superior to CE T1-TSE in terms of image contrast between lesions and the normal facial nerve.
Le texte complet de cet article est disponible en PDF.Keywords : IAC MR imaging, CE 3D T1-VISTA, Bell's palsy, Facial neuritis, Lesion-to-normal contrast ratio
Abbreviations : IAC, CR, CE, TSE, ROI, SENSE, VISTA, MR
Plan
Vol 42 - N° 2
P. 93-98 - avril 2015 Retour au numéro
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