Magnetic resonance neurography (MRN) is a relatively new non-invasive imaging technique for dedicated assessment of peripheral nerves.
It is used to assess peripheral nerve entrapments and impingements as well as localization and grading of nerve injuries and lesions.
Dedicated high-resolution MR sequences are utilized to optimally increase the conspicuity of nerve tissue signal. Exact parameters, planes and reconstructions will vary according to anatomical location, scanner constraints and local preference. Commonly used imaging protocols include 1-4:
- axial T1-weighted
- axial fat-suppressed T2-weighted
- 3D STIR (short tau inversion-recovery)
- 3D PSIF (reversed fast imaging in steady state precession)
Use of intravenous gadolinium contrast is usually restricted for assessment of infection, perineural involvement by tumor of to further assess mass lesions.
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