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Dural sinus thrombosis: study using intermediate field strength MR imaging.

S K McMurdo, M Brant-Zawadzki, W G Bradley

    Radiology
    |October 1, 1986
    PubMed
    Summary
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    Magnetic resonance (MR) imaging effectively diagnoses dural sinus thrombosis by identifying persistent high-intensity signals from clots. This method distinguishes true thrombosis from other signal variations and can reveal underlying causes and complications.

    Area of Science:

    • Neuroradiology
    • Medical Imaging

    Background:

    • Dural sinus thrombosis is a serious condition affecting venous drainage in the brain.
    • Accurate and timely diagnosis is crucial for patient management and preventing complications.

    Purpose of the Study:

    • To evaluate the utility of magnetic resonance (MR) imaging in diagnosing dural sinus thrombosis.
    • To assess MR imaging's ability to differentiate thrombus from other signal abnormalities and identify causative factors.

    Main Methods:

    • Retrospective review of MR images from six patients with confirmed dural sinus thrombosis.
    • Comparison of MR findings with computed tomography (CT) scans and arteriograms where available.
    • Analysis of signal characteristics within the affected dural sinuses.

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    Main Results:

    • All six patients demonstrated high-intensity signals from the thrombus on MR imaging across all echoes.
    • This persistent signal intensity reliably distinguished intravascular clot from flow-related enhancement and even-echo rephasing.
    • MR imaging identified the cause of thrombosis in three patients (tumors, mastoiditis) and revealed complications like infarction.

    Conclusions:

    • Magnetic resonance imaging is a safe and effective modality for diagnosing dural sinus thrombosis.
    • MR imaging's ability to characterize thrombus signals and identify causes makes it the preferred imaging method for suspected cases.