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Jugular foramen: anatomic and computed tomographic study.

D L Daniels, A L Williams, V M Haughton

    AJR. American Journal of Roentgenology
    |January 1, 1984
    PubMed
    Summary
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    Computed tomography (CT) precisely visualizes the jugular foramen, identifying cranial nerves IX, X, and XI. This imaging technique effectively evaluates osseous anatomy and excludes intracanalicular masses.

    Area of Science:

    • Radiology
    • Neuroimaging
    • Anatomy

    Background:

    • The jugular foramen is a complex anatomical structure at the skull base.
    • Detailed understanding of its appearance on computed tomography (CT) is crucial for diagnosis.

    Purpose of the Study:

    • To correlate anatomical and CT findings of the jugular foramen.
    • To establish optimal CT parameters for visualizing jugular foramen structures and cranial nerves.

    Main Methods:

    • Detailed examination of the computed tomographic (CT) appearance of the jugular foramen.
    • Correlation of anatomical and CT sections.
    • Identification of the pars nervosa and pars vascularis.
    • Use of intravenous contrast enhancement and rapid scanning sequences.
    • Specific gantry angulation (+30 degrees to the canthomeatal line) and section planes (parallel and positive, 0-30 degrees) were employed.

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    Main Results:

    • Cranial nerves IX, X, and XI were demonstrated with intravenous contrast enhancement.
    • The pars nervosa and pars vascularis were identified.
    • Optimal CT planes (parallel and positive, 0-30 degrees to the canthomeatal line) best depicted the osseous margins.
    • CT demonstrated high precision in evaluating osseous anatomy.

    Conclusions:

    • Computed tomography (CT) provides precise evaluation of the jugular foramen's osseous anatomy.
    • Specific CT techniques, including contrast enhancement and gantry angulation, effectively visualize cranial nerves IX, X, and XI.
    • CT is sufficiently precise to confidently exclude intracanalicular masses within the jugular foramen.