title: High-Resolution Qualitative and Quantitative Magnetic Resonance Evaluation of the Glenoid Labrum.
abstract: OBJECTIVE
  This study aimed to implement qualitative and quantitative magnetic resonance sequences for the evaluation of labral pathology.
  
  
  METHODS
  Six glenoid labra were dissected, and the anterior and posterior portions were divided into normal, mildly degenerated, or severely degenerated groups using gross and magnetic resonance findings. Qualitative evaluation was performed using T1-weighted, proton density-weighted, spoiled gradient echo and ultrashort echo time (UTE) sequences. Quantitative evaluation included T2 and T1rho measurements as well as T1, T2*, and T1rho measurements acquired with UTE techniques.
  
  
  RESULTS
  Spoiled gradient echo and UTE sequences best demonstrated labral fiber structure. Degenerated labra had a tendency toward decreased T1 values, increased T2/T2* values, and increased T1rho values. T2* values obtained with the UTE sequence allowed for delineation among normal, mildly degenerated, and severely degenerated groups (P < 0.001).
  
  
  CONCLUSIONS
  Quantitative T2* measurements acquired with the UTE technique are useful for distinguishing among normal, mildly degenerated, and severely degenerated labra.
authors.affiliation: From the *Department of Radiology, University of California, San Diego; and †Radiology Service, VA San Diego Healthcare System, San Diego, CA.
authors.forename: Kenyu
authors.initials: K
authors.lastname: Iwasaki
authors.forename: Monica
authors.initials: M
authors.lastname: Tafur
authors.forename: Eric Y
authors.initials: EY
authors.lastname: Chang
authors.forename: Sheronda
authors.initials: S
authors.lastname: Statum
authors.forename: Reni
authors.initials: R
authors.lastname: Biswas
authors.forename: Betty
authors.initials: B
authors.lastname: Tran
authors.forename: Won C
authors.initials: WC
authors.lastname: Bae
authors.forename: Jiang
authors.initials: J
authors.lastname: Du
authors.forename: Graeme M
authors.initials: GM
authors.lastname: Bydder
authors.forename: Christine B
authors.initials: CB
authors.lastname: Chung
mesh_terms: D000328:Adult; D000368:Aged; D002102:Cadaver; D004210:Dissection; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D010003:Osteoarthritis / Q000473:pathology*; D012540:Scapula / Q000473:pathology*; D012720:Severity of Illness Index