Clinical High-Resolution Imaging of the Inner Ear by Using Magnetic Resonance Imaging (MRI) and Cone Beam Computed...

Area of Science:

• Otorhinolaryngology
• Radiology
• Anatomy

Background:

• Inner ear imaging has advanced with magnetic resonance imaging (MRI).
• Clinical interpretation of inner ear imaging is challenging due to artifacts and limited anatomical knowledge.
• A direct comparison between imaging modalities and anatomical sections is needed.

Purpose of the Study:

• To compare high-resolution MRI and cone beam computed tomography (CBCT) imaging of the human inner ear with anatomical whole-mount sections.
• To clarify if observed MRI structures correlate with actual anatomy or are imaging artifacts.

Main Methods:

• A human inner ear specimen was imaged using 3-Tesla MRI and CBCT, generating high-resolution 3D datasets.
• The same specimen was sectioned, stained, and prepared as anatomical whole-mount sections.
• Imaging data were directly compared with the anatomical sections.

Main Results:

• Clinical MRI demonstrated high anatomical precision, clearly visualizing fluid-filled inner ear components like macular organs, ampullar crests, and the cochlear aqueduct.
• Truncation artifacts can be mistaken for the endolymphatic-perilymphatic membrane, which could not be directly visualized.
• T2-weighted MRI protocols effectively show inner ear fluid spaces.

Conclusions:

• High-resolution MRI can reliably display fine inner ear details relevant for clinical practice.
• Distinguishing imaging artifacts from true anatomical structures is essential for accurate image analysis.
• This comparative study serves as a valuable reference for interpreting inner ear imaging.