MRI of the Cranial Nerves—More than Meets the Eye: Technical Considerations and Advanced Anatomy
Section snippets
MR technique
The MR technique must be pushed to its limits to see all 12 cranial nerves and especially some of the segments or branches of these nerves that are more difficult to depict. Imaging plane, coil and sequence choice, slice thickness and in-plane resolution, use of special techniques like parallel imaging, asymmetric k-space, fat suppression, and so forth will all influence the final image quality.5
Olfactory epithelium
The olfactory epithelium is located in the upper one fifth of the nasal cavity and covers the septal and lateral surface of this cavity, including the upper part of the superior turbinate (Fig. 6).
Transethmoidal segment
Bipolar olfactory neurons connect the olfactory epithelium with the olfactory bulbs. These neurons experience a continuous cycle of growth, degeneration, and replacement, which make them “unique” neurons. The dendrites of these olfactory neurons reach the surface of the olfactory epithelium while the
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