title: Axial traction magnetic resonance imaging (MRI) of the glenohumeral joint in healthy volunteers: initial experience.
abstract: OBJECTIVE
  Evaluate technical feasibility and potential applications of glenohumeral (GH) joint axial traction magnetic resonance imaging (MRI) in healthy volunteers.
  
  
  METHODS
  Eleven shoulders were imaged in neutral and with 4kg axial traction at 3T. Quantitative measurements were assessed.
  
  
  RESULTS
  Axial traction was well tolerated. There was statistically significant widening of the superior GH joint space (p=0.002) and acromial angle (p=0.017) with traction. Inter-rater agreement was high.
  
  
  CONCLUSIONS
  GH joint axial traction MRI is technically feasible and well tolerated in volunteers. Traction of the capsule, widening of the superior GH joint space and acromial angle were observed.
authors.affiliation: New York University, Department of Radiology, Division of Musculoskeletal Radiology, United States. Electronic address: elisabeth.garwood@nyumc.org.
authors.forename: Elisabeth R
authors.initials: ER
authors.lastname: Garwood
authors.affiliation: University of California, San Francisco, Department of Radiology and Biomedical Imaging, United States; University of California, San Francisco, Department of Physical Therapy and Rehabilitation Science, United States.
authors.forename: Richard B
authors.initials: RB
authors.lastname: Souza
authors.affiliation: University of California, San Francisco, Department of Epidemiology and Biostatistics, United States.
authors.forename: Amy
authors.initials: A
authors.lastname: Zhang
authors.affiliation: University of California, San Francisco, Department of Orthopaedic Surgery, United States.
authors.forename: Alan L
authors.initials: AL
authors.lastname: Zhang
authors.affiliation: University of California, San Francisco, Department of Orthopaedic Surgery, United States.
authors.forename: C Benjamin
authors.initials: CB
authors.lastname: Ma
authors.affiliation: University of California, San Francisco, Department of Radiology and Biomedical Imaging, United States.
authors.forename: Thomas M
authors.initials: TM
authors.lastname: Link
authors.affiliation: University of California, San Francisco, Department of Radiology and Biomedical Imaging, United States.
authors.forename: Daria
authors.initials: D
authors.lastname: Motamedi
mesh_terms: D000328:Adult; D005260:Female; D064368:Healthy Volunteers; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D010865:Pilot Projects; D011446:Prospective Studies; D012785:Shoulder Joint / Q000000981:diagnostic imaging*
keywords: Axial load; Glenohumeral joint; Labrum; Stress MRI; Traction MRI; Weighted MRI