Objective To explore the feasibility of high resolution magnetic resonance neurography(MRN) of brachial plexus and its clinical application value in the injury of brachial plexus.Methods 20 volunteers and 30 patients with the injury of the brachial plexus underwent cervical conventional scans,high resolution of peripheral nerve imaging sequence(3D-STIR sequence) scans.The obtained images were then transferred to the workstation for 3D reconstruction.Relevant anatomy details and traumatic signs of the brachial plexus were evaluated.Results High resolution magnetic resonance imaging of peripheral nerves could clearly display the relevant anatomy details of the brachial plexus in all volunteers.The enhanced scan of 3D STIR sequence could significantly improve the background suppression effect,therefore could clearly display the various traumatic signs of the brachial plexus.Conclusion High resolution magnetic resonance neurography can clearly display the relevant anatomy details and traumatic signs of the brachial plexus,it may become a novel noninvasive imaging method for the evaluation of the injury of brachial plexus.