title: High-resolution morphologic and ultrashort time-to-echo quantitative magnetic resonance imaging of the temporomandibular joint.
abstract: OBJECTIVE
  To implement high-resolution morphologic and quantitative magnetic resonance imaging (MRI) of the temporomandibular joint (TMJ) using ultrashort time-to-echo (UTE) techniques in cadavers and volunteers.
  
  
  METHODS
  This study was approved by the institutional review board. TMJs of cadavers and volunteers were imaged on a 3-T MR system. High-resolution morphologic and quantitative sequences using conventional and UTE techniques were performed in cadaveric TMJs. Morphologic and UTE quantitative sequences were performed in asymptomatic and symptomatic volunteers.
  
  
  RESULTS
  Morphologic evaluation demonstrated the TMJ structures in open- and closed-mouth position. UTE techniques facilitated the visualization of the disc and fibrocartilage. Quantitative UTE MRI was successfully performed ex vivo and in vivo, reflecting the degree of degeneration. There was a difference in the mean UTE T2* values between asymptomatic and symptomatic volunteers.
  
  
  CONCLUSIONS
  MRI evaluation of the TMJ using UTE techniques allows characterization of the internal structure and quantification of the MR properties of the disc. Quantitative UTE MRI can be performed in vivo with short scan times.
authors.affiliation: Department of Radiology, Veterans Administration (VA) San Diego Healthcare System, 3350 La Jolla Village Drive, San Diego, CA, 92161, USA.|Department of Radiology, University of California, San Diego, School of Medicine, 408 Dickinson Street, San Diego, CA, 92103-8226, USA.
authors.forename: Won C
authors.initials: WC
authors.lastname: Bae
authors.affiliation: Department of Radiology, University of California, San Diego, School of Medicine, 408 Dickinson Street, San Diego, CA, 92103-8226, USA.
authors.forename: Monica
authors.initials: M
authors.lastname: Tafur
authors.affiliation: Department of Radiology, Veterans Administration (VA) San Diego Healthcare System, 3350 La Jolla Village Drive, San Diego, CA, 92161, USA.|Department of Radiology, University of California, San Diego, School of Medicine, 408 Dickinson Street, San Diego, CA, 92103-8226, USA.
authors.forename: Eric Y
authors.initials: EY
authors.lastname: Chang
authors.affiliation: Department of Radiology, University of California, San Diego, School of Medicine, 408 Dickinson Street, San Diego, CA, 92103-8226, USA.
authors.forename: Jiang
authors.initials: J
authors.lastname: Du
authors.affiliation: Department of Radiology, Veterans Administration (VA) San Diego Healthcare System, 3350 La Jolla Village Drive, San Diego, CA, 92161, USA.|Department of Radiology, University of California, San Diego, School of Medicine, 408 Dickinson Street, San Diego, CA, 92103-8226, USA.
authors.forename: Reni
authors.initials: R
authors.lastname: Biswas
authors.affiliation: Department of Radiology, Ajou University Medical Center, San 5, Wonchon-dong, Yeongtong-gu, Gyeonggi-do, Suwon, 443-721, Republic of Korea.
authors.forename: Kyu-Sung
authors.initials: KS
authors.lastname: Kwack
authors.affiliation: Department of Radiology, University of California, San Diego, School of Medicine, 408 Dickinson Street, San Diego, CA, 92103-8226, USA.
authors.forename: Robert
authors.initials: R
authors.lastname: Healey
authors.affiliation: Department of Radiology, Veterans Administration (VA) San Diego Healthcare System, 3350 La Jolla Village Drive, San Diego, CA, 92161, USA.|Department of Radiology, University of California, San Diego, School of Medicine, 408 Dickinson Street, San Diego, CA, 92103-8226, USA.
authors.forename: Sheronda
authors.initials: S
authors.lastname: Statum
authors.affiliation: Department of Radiology, Veterans Administration (VA) San Diego Healthcare System, 3350 La Jolla Village Drive, San Diego, CA, 92161, USA. cbchung@ucsd.edu.|Department of Radiology, University of California, San Diego, School of Medicine, 408 Dickinson Street, San Diego, CA, 92103-8226, USA. cbchung@ucsd.edu.
authors.forename: Christine B
authors.initials: CB
authors.lastname: Chung
mesh_terms: D000328:Adult; D000368:Aged; D002102:Cadaver; D005260:Female; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D012016:Reference Values; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013704:Temporomandibular Joint / Q000000981:diagnostic imaging*; D013705:Temporomandibular Joint Disorders / Q000000981:diagnostic imaging*
keywords: Magnetic resonance imaging; Temporomandibular joint; Ultrashort echo time (UTE)