A Novel MR Imaging Sequence of 3D-ZOOMit Real Inversion-Recovery Imaging Improves Endolymphatic Hydrops Detection in
Background And Purpose:
The detection rate of premortem MR imaging endolymphatic hydrops is lower than that of postmortem endolymphatic hydrops in Ménière disease, indicating that current MR imaging techniques may underestimate endolymphatic hydrops. Therefore, we prospectively investigated whether a novel high-resolution MR imaging technique, the 3D zoomed imaging technique with parallel transmission real inversion-recovery (3D-ZOOMit real IR), would improve the detection of endolymphatic hydrops compared with conventional 3D TSE inversion-recovery with real reconstruction.
Materials And Methods:
Fifty patients with definite unilateral Ménière disease were enrolled and underwent 3D-ZOOMit real IR and 3D TSE inversion-recovery with real reconstruction 6 hours after IV gadolinium injection. The endo- and perilymph spaces were scored separately. The contrast-to-noise ratio, SNR, and signal intensity ratio of the 2 sequences were respectively calculated and compared. The presence of endolymphatic hydrops was evaluated.
Results:
The endolymphatic space in the cochlea and vestibule was better visualized with 3D-ZOOMit real IR than with conventional 3D TSE inversion-recovery with real reconstruction (P < .001). There were differences between the 2 sequences in the evaluation of no cochlear hydrops and cochlear hydrops (both, P < .017). All contrast-to-noise ratio, SNR, and signal intensity ratio values of 3D-ZOOMit real IR images were statistically higher than those of conventional 3D TSE inversion-recovery with real reconstruction (all, P < .001).
Conclusions:
The 3D-ZOOMit real IR sequences are superior to conventional 3D TSE inversion-recovery with real reconstruction sequences in visualizing the endolymphatic space, detecting endolymphatic hydrops, and discovering contrast permeability.
Insights
A new MRI technique, 3D-ZOOMit real IR, significantly improves the detection of endolymphatic hydrops in Ménière disease patients. This advanced method offers superior visualization of inner ear fluid spaces compared to conventional MRI sequences.
Area of Science:
- Radiology
- Otolaryngology
- Medical Imaging
Background:
- Current MRI techniques may underestimate endolymphatic hydrops in Ménière disease.
- Premortem detection rates are lower than postmortem rates, highlighting a diagnostic gap.
Purpose of the Study:
- To evaluate a novel high-resolution MRI technique, 3D-ZOOMit real IR.
- To compare its effectiveness in detecting endolymphatic hydrops against conventional 3D TSE inversion-recovery with real reconstruction.
Main Methods:
- Fifty patients with definite unilateral Ménière disease were prospectively studied.
- Two MRI sequences (3D-ZOOMit real IR and 3D TSE inversion-recovery) were performed 6 hours post-gadolinium injection.
- Endolymphatic and perilymphatic spaces were scored, and image quality metrics (CNR, SNR, SIR) were compared.
Main Results:
- 3D-ZOOMit real IR provided significantly better visualization of the endolymphatic space in the cochlea and vestibule (P < .001).
- There were significant differences in hydrops evaluation between the two sequences (P < .017).
- All image quality metrics were statistically higher for 3D-ZOOMit real IR (P < .001).
Conclusions:
- The 3D-ZOOMit real IR sequence is superior for visualizing endolymphatic spaces.
- This novel technique improves the detection of endolymphatic hydrops and contrast permeability.
- It offers enhanced diagnostic capabilities for Ménière disease compared to conventional MRI.
