[Magnetic resonance imaging in denervated muscle. A preliminary study]

E Fanucci, S Masala, R Floris, A Apruzzese, L Gagliarducci, A Orlacchio, C Iani, G Simonetti
La Radiologia Medica 1994, 88 (3): 216-20
Ten patients with various forms of peripheral neuropathy and spinal radiculopathy were examined with MRI using a low-field permanent magnet (0.2 T) and spin echo (SE)/inversion recovery (IR) sequences, with an adequate inversion time to suppress healthy muscle signal. In acute denervation MR sensitivity was low on both sequences; in subacute denervation the damaged muscle was more intense than the healthy muscle only on IR sequences. MRI adequately depicted fatty infiltration in chronic denervation. In conclusion, MRI is a promising tool for mapping and noninvasively monitoring denervated motor units in skeletal muscles, whose role is currently complementary to that of electromyography.

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