title: Value of enhancement technique in 3D-T2-STIR images of the brachial plexus.
abstract: OBJECTIVE
  Imaging the brachial plexus is a challenge because of its complicated structure. The purpose of this study is to improve the diagnostic ability for brachial plexus via 3-dimensional T2-weighted short inversion time inversion recovery (3D-T2-STIR) technique with contrast agent administration.
  
  
  METHODS
  Thirty patients with brachial plexopathies were recruited. The STIR sequences without and with contrast agent administration were performed on each subject. The grade of the diagnostic ability and the contrast ratio were assessed.
  
  
  RESULTS
  After contrast agent administration, signals of the adjacent vessels were suppressed because of reduced T1 relaxation time similar to that of fat tissues. The outlines of nerves would be prominent with respect to surrounding tissues. Both diagnostic ability and contrast ratio were improved on 3D-T2-STIR with contrast agent administration.
  
  
  CONCLUSIONS
  The maximum-intensity projection image of 3D-T2-STIR technique with contrast agent was superior to that without. It might be a better way to evaluate anatomies and pathologies of the brachial plexus. These advantages would improve the understanding and neurosurgical planning for brachial plexopathies in the future.
authors.affiliation: From the *Department of Diagnostic Radiology, Chang Gung Memorial Hospital, Chiayi Branch, Chang Gung University of Science and Technology, Chiayi; †Department of Diagnostic Radiology, Chang Gung Memorial Hospital, Chiayi Branch, Chang Gung University; and ‡Department of Medical Imaging and Radiological Science, Chung Gung University, Taoyuan; and §Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu, Taiwan.
authors.forename: Wen-Chang
authors.initials: WC
authors.lastname: Chen
authors.forename: Yuan-Hsiung
authors.initials: YH
authors.lastname: Tsai
authors.forename: Hsu-Huei
authors.initials: HH
authors.lastname: Weng
authors.forename: Shih-Chorng
authors.initials: SC
authors.lastname: Wang
authors.forename: Ho-Ling
authors.initials: HL
authors.lastname: Liu
authors.forename: Shin-Lei
authors.initials: SL
authors.lastname: Peng
authors.forename: Chih-Feng
authors.initials: CF
authors.lastname: Chen
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000465:Algorithms; D001917:Brachial Plexus / Q000473:pathology*; D020516:Brachial Plexus Neuropathies / Q000473:pathology*; D003287:Contrast Media; D005260:Female; D019786:Gadolinium DTPA; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D055815:Young Adult
chemical_list: D003287:Contrast Media; D019786:Gadolinium DTPA