Abstract
Objectives
The aim of this study was to shorten the 4-h delay between the intravenous administration of gadolinium and MRI acquisition for hydrops evaluation using an optimized 3D-FLAIR sequence in patients with Menière’s disease.
Methods
This was a single-center prospective study including 29 patients (58 ears), recruited between November 2020 and February 2021. All patients underwent a 3-T MRI with an optimized 3D-FLAIR sequence without contrast then at 1 h, 2 h, and 4 h after intravenous administration of gadobutrol. The signal intensity ratio was quantitatively assessed with the region of interest method. We also evaluated the volume of endolymphatic structures (saccule, utricle) then the presence of endolymphatic hydrops and blood-labyrinthine barrier impairment at each acquisition time.
Results
For all ears, the signal intensity ratio was significantly non-inferior at 2 h compared to 4 h, with a mean geometric signal intensity ratio at 0.83 (95% CI: 0.76 to 0.90, one-sided p < .001 for non-inferiority at −30% margin). Mean volume equivalence of saccule and utricle between 2 and 4 h was proven at a ± 0.20 standardized deviation equivalence margin. Intra-rater agreements (Cohen’s kappa) were all greater than 0.90 for all endolymphatic hydrops location and blood-labyrinthine-barrier impairment between the 2- and 4-h assessments.
Conclusions
We demonstrated that using an optimized 3D-FLAIR sequence we could shorten the acquisition from 4 to 2 h with a high reliability for the diagnosis of endolymphatic hydrops and blood-labyrinthine-barrier impairment.
Clinical trial registration
Clinical trial no: 38RC15.173
Key Points
• Magnetic resonance imaging with delayed 3D-FLAIR sequences allows the diagnosis of endolymphatic hydrops in patients with definite Menière’s disease.
• An optimized 3D-FLAIR sequence with a long TR of 16000 ms and a constant flip angle allows for reducing the delay between intravenous injection of gadobutrol and MRI acquisition from 4 to 2 h to diagnose endolymphatic hydrops.
• Reducing this delay between intravenous injection and MRI acquisition could have implications for clinical practice for both patients and imaging departments.
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Abbreviations
- BLB:
-
Blood-labyrinthine-barrier
- CNR:
-
Contrast-to-noise ratio
- EH:
-
Endolymphatic hydrops
- FOV:
-
Field of view
- GRAPPA:
-
Generalized auto calibrating partially parallel acquisition
- IC:
-
Confidence interval
- ICC:
-
Intraclass correlation coefficient
- MD:
-
Meniere disease
- Nex:
-
Number of excitations
- SD:
-
Standard deviation
- SIR:
-
Signal intensity ratio
- SMD:
-
Standardized mean difference
- TE:
-
Echo time
- TI:
-
Time inversion
- TR:
-
Repetition time
- κ:
-
Cohen’s kappa
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The scientific guarantor of this publication is Michaël Eliezer.
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One of the authors (Alexis Vaussy) of this manuscript is an employee of Siemens Healthcare. The remaining authors declare no relationships with any companies whose products or services may be related to the subject matter of the article.
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Barlet, J., Vaussy, A., Ejzenberg, Y. et al. Optimized 3D-FLAIR sequences to shorten the delay between intravenous administration of gadolinium and MRI acquisition in patients with Menière’s disease. Eur Radiol 32, 6900–6909 (2022). https://doi.org/10.1007/s00330-022-08889-y
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DOI: https://doi.org/10.1007/s00330-022-08889-y