Imaging of facial neuritis using T2-weighted gradient-echo fast imaging employing steady-state acquisition after gadolinium injection

Hector, M.C Zamora; Alnadji, Ahmad; Veillon, F.; Eid, M. Abu; Charpiot, Anne; Debry, Christian; Venkatasamy, Aïna

doi:10.1007/s00405-020-06375-z

Cited by 3 publications

(2 citation statements)

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“…4) was slightly superior to the FLAIR sequence (higher sensitivity, respectively 94% vs 92%). The two sequences combined were100% specific [5]. Similarly, contrastenhanced FLAIR sequence acquired at 1.5 T, 1 h after intravenous gadolinium injection, appeared useful to diagnose acute vestibular neuritis (Fig.…”

Section: Inner Ear and Neural Inflammationmentioning

confidence: 94%

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Present and future of the labyrinth imaging: Focus on the use of T2-weighted and contrast-enhanced delayed FLAIR (1 h) sequences

Veillon

Riehm

Eliezer

et al. 2021

VES

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OBJECTIVE: Part of the recent progress in the labyrinth imaging has been made possible by the rise of contrast-free T2-weighted and delayed (1h) FLAIR sequences. The aim of this article is to review evidence for the use of these two sequences to image the inner ear, especially the posterior membranous labyrinth. MATERIAL AND METHODS: We analyzed MRI-based papers (2007–2020)using high-resolution T2-weighted or contrast-enhanced FLAIR (1h) sequences to image the inner ear. RESULTS: T2-weighted sequences (3T MRI)enabled the visualization of the posterior membranous labyrinth with good correlation when compared to corresponding histological slices.Significant progress has been made, especially in terms of scanning time, aiming at reducing it, in order to decrease motions artifacts. The saccule is visible on a 3T MRI without significant motion artifacts. Its shape is ovoid, with a maximum height and width of 1.6 and 1.4 mm, respectively. An enlarged saccule was observed in 84%of patients with unilateral Meniere’s disease, in 28%of patients with vestibular schwannomas (VS) and 47%of patients with intralabyrinthine schwannomas. VS obstructing the internal auditory canal caused a decrease of the perilymphatic signal (more moderate decrease in meningiomas) on T2 gradient-echo images. Contrast-enhanced FLAIR sequences are useful to image vestibular/facial neuritis and inflammatory inner ear diseases. CONCLUSION: Precise analysis of the posterior membranous labyrinth, in terms of size, shape and signal intensity, is possible on a 3T MRI using high-resolution gradient-echo T2-weighted sequences. Such sequences are an interesting add-on to delayed (4h30) FLAIR-based protocols for labyrinth imaging.

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Section: Inner Ear and Neural Inflammationmentioning

confidence: 94%

“…Regarding facial nerve inflammation, FLAIR sequences have proven useful to image acute facial neuritis in patients with acute peripheral nerve palsy, with high sensitivity and specificity (> 90%) [5,9]. The diagnostic performance of a high-resolution contrast-enhanced T2 sequence (Fig.…”

Section: Inner Ear and Neural Inflammationmentioning

confidence: 99%