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Unilateral decrease in inner ear signal in fluid-attenuated inversion recovery sequences in previously suspected
S Foth1, S Meller1, S De Decker2
1Department of Small Animal Medicine and Surgery, University of Veterinary Medicine Hannover, Germany.
Veterinary Journal (London, England : 1997)
|September 19, 2021
Summary
Magnetic resonance imaging (MRI) can detect inner ear changes in dogs with idiopathic vestibular syndrome (IVS). Affected ears showed significantly less signal suppression on MRI compared to unaffected ears, correlating with clinical signs.
Area of Science:
- Veterinary Neurology
- Diagnostic Imaging
- Comparative Medicine
Background:
- Canine idiopathic vestibular syndrome (IVS) aetiology is unknown.
- Human MRI techniques reveal inner ear endolymph differences in vestibular disorders.
- Investigating similar MRI applications in canine IVS is warranted.
Purpose of the Study:
- To assess if MRI can detect inner ear changes in canine IVS patients.
- To evaluate the utility of T2-weighted and FLAIR MRI sequences.
- To correlate MRI findings with clinical signs of IVS.
Main Methods:
- Retrospective review of medical records from two veterinary referral clinics.
- Inclusion criteria: IVS diagnosis, lateralized clinical signs, vestibular MRI.
- Region of interest (ROI) analysis of inner ear FLAIR suppression ratios.
Main Results:
- 80 dogs were included in the study.
- Affected ears showed significantly lower FLAIR suppression (0.8886) versus unaffected ears (0.9348; P = 0.0021).
- MRI findings agreed with clinical signs in 92.5% of cases.
Conclusions:
- Preliminary evidence suggests MRI can visualize endolymph changes in canine IVS.
- MRI findings correlate with the laterality of clinical signs in dogs with IVS.
- Further research is needed to link MRI changes severity with prognosis.
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