[Superstructure of stapes: an analysis by high-resolution computed tomography]

Area of Science:

• Radiology
• Otolaryngology
• Anatomy

Background:

• High-resolution computed tomography (HRCT) is crucial for temporal bone lesion diagnosis.
• Accurate assessment of ossicles, particularly the stapes, is vital for pre-operative evaluation.
• Reliability of HRCT for stapes superstructure assessment requires further analysis.

Purpose of the Study:

• To evaluate the diagnostic availability of HRCT findings for stapes superstructure.
• To assess the reliability of HRCT in visualizing stapes superstructure in various temporal bone conditions.

Main Methods:

• Retrospective analysis of HRCT scans from 226 ears.
• Inclusion of normal ears (148), chronic otitis media (71), and ossicular abnormalities (7).
• Comparison of HRCT findings with surgical outcomes in pathological cases.

Main Results:

• Stapes superstructure visualization by HRCT was achieved in 70% of cases when the stapes was air-surrounded.
• Partial volume averaging and soft tissue silhouetting were identified as major limitations.
• Diagnostic accuracy is reduced when the stapes is obscured by soft tissue density.

Conclusions:

• HRCT can visualize stapes superstructure, but its reliability is limited by specific imaging artifacts.
• Air-surrounding of the stapes significantly enhances HRCT visualization.
• Further research may be needed to optimize HRCT techniques for stapes assessment.