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Related Experiment Videos

Orbit: initial experience with surface coil spin-echo MR imaging at 1.5 T.

S W Atlas, L T Bilaniuk, R A Zimmerman

    Radiology
    |August 1, 1987
    PubMed
    Summary
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    Surface coil magnetic resonance (MR) imaging enhances orbital diagnostics, offering crucial details beyond computed tomography (CT). This advanced MR technique aids in identifying orbital apex lesions and differentiating tumors.

    Area of Science:

    • Radiology
    • Ophthalmology
    • Medical Imaging

    Background:

    • Orbital imaging is crucial for diagnosing various pathologies.
    • Computed tomography (CT) has limitations in visualizing certain orbital structures.
    • Magnetic resonance (MR) imaging offers advanced visualization capabilities.

    Purpose of the Study:

    • To evaluate the utility of surface coil MR imaging in orbital diagnostics.
    • To compare the diagnostic performance of MR imaging with CT for orbital lesions.

    Main Methods:

    • Review of 59 cases undergoing surface coil MR imaging of the orbit.
    • Utilized spin-echo techniques at 1.5 Tesla with short and long repetition time/echo time (TR/TE) sequences.
    • Employed small-diameter surface coils for short TR/TE and a standard head coil for long TR/TE.

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    Main Results:

    • Surface coil MR imaging is a valuable adjunct to orbital imaging.
    • MR excels in identifying lesions in the orbital apex, superior orbital fissure, and optic canal.
    • MR differentiates inflammatory pseudotumor from malignancy, characterizes hemorrhage, defines glioma extent, and detects vascular abnormalities.
    • CT is superior for evaluating small, calcified perioptic meningiomas.

    Conclusions:

    • Surface coil MR imaging provides critical information not obtainable with CT.
    • MR imaging significantly improves the diagnosis and characterization of orbital pathologies.
    • Combined use of MR and CT offers comprehensive orbital evaluation.