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Related Experiment Videos

MR cisternography: initial experience in 41 cases

T el Gammal1, B S Brooks

  • 1Department of Radiology, University of Alabama at Birmingham 35233-6830.

AJNR. American Journal of Neuroradiology
|October 1, 1994
PubMed
Summary
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MR cisternography offers superior visualization of subarachnoid structures compared to conventional MRI. This advanced technique aids in diagnosing cerebrospinal fluid (CSF) fistulas and intracranial masses.

Area of Science:

  • Neuroradiology
  • Medical Imaging

Background:

  • Conventional magnetic resonance (MR) imaging has limitations in depicting the detailed anatomy of subarachnoid cisterns.
  • There is a need for advanced MR techniques to enhance visualization of cerebrospinal fluid (CSF) and its surrounding structures.

Purpose of the Study:

  • To evaluate the initial experience with MR cisternography, a novel application of fast spin-echo MR with fat suppression.
  • To compare the efficacy of MR cisternography with routine cranial MR studies in visualizing subarachnoid cisterns and their contents.

Main Methods:

  • MR cisternography utilizes a heavily T2-weighted fast spin-echo technique with high spatial resolution, fat suppression, and image reversal.
  • A maximum-intensity projection algorithm compresses multiple sections into a composite 3D image, enhancing CSF signal intensity.

Related Experiment Videos

  • The technique was applied to 41 patients, often as an additional sequence to conventional MR studies.

    • Main Results:

    • MR cisternography provided crucial information not available with conventional MR in 17 out of 21 diseased cases.
    • It successfully visualized CSF fistulas, aneurysm origins, tumor locations (intraaxial vs. extraaxial), and detailed pituitary gland anatomy.
    • Novel observations included a CSF sleeve around the third nerve in the posterior cavernous sinus in 85% of cases.

    Conclusions:

    • MR cisternography demonstrates superiority over conventional MR in delineating subarachnoid space structures.
    • This technique is highly recommended for evaluating cranial CSF fistulas, suprasellar and posterior fossa masses, and determining intracranial tumor location.