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[MR cisternography using "long echo train length fast spin echo sequence" for demonstrating the inner ear]

Y Takehara1, K Ichijo, N Tohyama

  • 1Department of Radiology, Seirei Mikatabera General Hospital.

Nihon Igaku Hoshasen Gakkai Zasshi. Nippon Acta Radiologica
|July 25, 1993
PubMed
Summary

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This study demonstrates that a long echo train length fast spin echo sequence provides excellent MR cisternography quality. This technique effectively visualizes inner ear structures and cranial nerves VII and VIII.

Area of Science:

  • Radiology
  • Neuroimaging
  • Magnetic Resonance Imaging

Context:

  • MR cisternography is crucial for evaluating the cerebellopontine angle and internal auditory canal.
  • Optimizing imaging sequences is essential for detailed anatomical visualization.

Purpose:

  • To evaluate the efficacy of a "long echo train length fast spin echo sequence" for MR cisternography.
  • To assess the visualization quality of inner ear structures and cranial nerves VII and VIII.

Summary:

  • Excellent MR cisternography quality was achieved using a "long echo train length fast spin echo sequence" (TR/TE = 2666/200, ETL = 24).
  • Detailed visualization of inner ear anatomy (canaliculus cochleae, lamina spiralis ossea) and cranial nerves VII, VIII was obtained.
  • Vessels in the cerebellopontine angle and internal auditory canal were clearly differentiated from nerve bundles.

Related Experiment Videos

  • The sequence demonstrated a better signal-to-noise ratio compared to the 3 DFT method, though additional scans may be needed for cranio-caudal resolution.

    • Impact:

    • This sequence offers a valuable tool for high-resolution neuroimaging of the posterior fossa.
    • Improved visualization aids in the diagnosis and management of pathologies affecting the inner ear and cranial nerves.
    • The findings contribute to the advancement of MRI techniques for detailed anatomical assessment.