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High-resolution computed tomographic appearance of normal cochlear aqueduct.

S Bhimani, C Virapongse, M Sarwar

    AJNR. American Journal of Neuroradiology
    |November 1, 1984
    PubMed
    Summary

    Computed tomographic (CT) scans revealed the average width of the external cochlear aqueduct opening is 2.9 mm. The funnel shape was the most common configuration in adults, with no significant variation by age or gender.

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    Area of Science:

    • Anatomy
    • Radiology
    • Otolaryngology

    Background:

    • The cochlear aqueduct is a small bony canal in the temporal bone.
    • Its visualization on imaging can be challenging.
    • Understanding its normal anatomy is crucial for diagnosing related pathologies.

    Purpose of the Study:

    • To analyze the morphometry of the normal adult cochlear aqueduct using computed tomography (CT).
    • To determine the typical dimensions and configurations of the external cochlear aqueduct opening.
    • To assess potential variations in size and shape related to age and gender.

    Main Methods:

    • Retrospective analysis of computed tomographic (CT) scans from 37 adult patients with normal cochlear aqueducts.
    • Axial CT views were used to assess the inferomedial part of the cochlear aqueduct.

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  • Measurements of the external cochlear aqueduct opening width and tabulation of configurations were performed.

    • Main Results:

    • The inferomedial portion of the cochlear aqueduct was typically visualized on axial CT.
    • The average width of the external cochlear aqueduct opening was 2.9 mm.
    • The funnel configuration was the most frequently observed (22 cases), with no significant differences noted across age or gender groups.

    Conclusions:

    • Normal adult cochlear aqueduct dimensions and configurations can be characterized using CT.
    • The funnel shape is the predominant configuration.
    • CT findings suggest that age and gender do not significantly influence the size of the external cochlear aqueduct opening.