MR Neurography is a non-invasive MRI technique I use to help diagnose disorders of the peripheral nerves and plexi. A special MRI protocol is used to optimally image the nerves and then the images are reconstructed on a computer workstation to "straighten" out the nerve pathways to better understand the anatomy. The studies are usually completed in 30 minutes or less. MR Neurography is used in combination with nerve conduction studies and electromyography to characterize and localize peripheral nerve disorders. The commonest indications are
Nerve entrapment
Trauma
Brachial plexus
Piriformis syndrome.
There is no special preparation. MR Neurography is performed without contrast.
Here is a link to one article on MR Neurography I wrote.