title: 3T MR tomography of the brachial plexus: structural and microstructural evaluation.
abstract: Magnetic resonance (MR) neurography comprises an evolving group of techniques with the potential to allow optimal noninvasive evaluation of many abnormalities of the brachial plexus. MR neurography is clinically useful in the evaluation of suspected brachial plexus traumatic injuries, intrinsic and extrinsic tumors, and post-radiogenic inflammation, and can be particularly beneficial in pediatric patients with obstetric trauma to the brachial plexus. The most common MR neurographic techniques for displaying the brachial plexus can be divided into two categories: structural MR neurography; and microstructural MR neurography. Structural MR neurography uses mainly the STIR sequence to image the nerves of the brachial plexus, can be performed in 2D or 3D mode, and the 2D sequence can be repeated in different planes. Microstructural MR neurography depends on the diffusion tensor imaging that provides quantitative information about the degree and direction of water diffusion within the nerves of the brachial plexus, as well as on tractography to visualize the white matter tracts and to characterize their integrity. The successful evaluation of the brachial plexus requires the implementation of appropriate techniques and familiarity with the pathologies that might involve the brachial plexus.
authors.affiliation: Department of Radiology, Division of Neuroradiology and Musculoskeletal Radiology, Medical University of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria. Ammar.Mallouhi@meduniwien.ac.at
authors.forename: Ammar
authors.initials: A
authors.lastname: Mallouhi
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Marik
authors.forename: Daniela
authors.initials: D
authors.lastname: Prayer
authors.forename: Franz
authors.initials: F
authors.lastname: Kainberger
authors.forename: Gerd
authors.initials: G
authors.lastname: Bodner
authors.forename: Gregor
authors.initials: G
authors.lastname: Kasprian
mesh_terms: D001917:Brachial Plexus / Q000033:anatomy & histology*; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity