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High-resolution Functional Magnetic Resonance Imaging Methods for Human Midbrain
Published on: May 10, 2012
The extracranial facial nerve: high resolution three-dimensional Fourier transform MR imaging
R B McGhee1, D W Chakeres, P Schmalbrock
1Department of Radiology, Ohio State University Hospitals, Ohio State University College of Medicine, Columbus 43210.
AJNR. American Journal of Neuroradiology
|March 1, 1993
Summary
High-resolution 3D MRI effectively visualizes the extracranial facial nerve. This advanced magnetic resonance imaging (MRI) technique provides clear images of the facial nerve, aiding in diagnosis and study.
Area of Science:
- Radiology
- Medical Imaging
Background:
- The extracranial facial nerve is crucial for facial movement.
- Accurate visualization of the facial nerve is important for diagnosing various neurological conditions.
Purpose of the Study:
- To evaluate the utility of high-resolution three-dimensional (3D) Fourier transform gradient-echo magnetic resonance (MR) imaging for visualizing the extracranial facial nerve.
Main Methods:
- Ten subjects (9 normal, 1 patient) underwent MR scanning.
- Imaging parameters were optimized, focusing on T1-weighted gradient-echo sequences with specific field-of-view and matrix settings.
- Acquisition time was kept under 7 minutes.
Main Results:
- Gadolinium-diethylenetriaminepentaacetic acid (Gd-DTPA) did not enhance visualization of the normal nerve.
- The optimal technique consistently depicted the proximal extracranial facial nerve as a low-signal tubular structure on contiguous images.
- Curved oblique planar reconstructions aided in displaying long segments of the nerve.
Conclusions:
- High-resolution 3D MR imaging reliably demonstrates the intraparotid facial nerve.
- This technique offers a consistent method for visualizing facial nerve anatomy.
