title: Diagnosis of Internal Derangement of the Knee: Volume Isotropic Turbo Spin-Echo Acquisition MRI With Fat Suppression Versus Without Fat Suppression.
abstract: OBJECTIVE
  The purpose of this study was to compare 3D volume isotropic turbo spin-echo acquisition (VISTA) MRI with and without fat suppression for use in evaluating ligaments, menisci, and cartilage.
  
  
  METHODS
  Two radiologists retrospectively and independently reviewed 71 MRI studies. Each study consisted of 3D intermediate-weighted VISTA images with fat suppression and without fat suppression. The presence of tears of the anterior cruciate and posterior cruciate ligaments, tears of the medial and lateral menisci, and cartilaginous defects was evaluated. Arthroscopic surgical findings were used as the standard of reference. Statistical analysis was performed to calculate the sensitivity, specificity, and accuracy of the two methods.
  
  
  RESULTS
  Mean specificity and accuracy for medial meniscal tears were significantly higher with VISTA (specificity, 95.0%; accuracy, 94.4%) than with fat-suppressed VISTA (FS-VISTA) (specificity, 81.3%; accuracy, 85.9%), and the difference was statistically significant (specificity, p = 0.003; accuracy, p = 0.004). Mean specificity for cartilaginous defects was also significantly higher with VISTA than with FS-VISTA (99.1% vs 96.8%, p = 0.039). There were no other significant differences between the two methods.
  
  
  CONCLUSIONS
  Three-dimensional VISTA MRI has higher specificity than FS-VISTA imaging for evaluation of medial meniscal tears and cartilaginous defects.
authors.affiliation: 1 Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul 135-710, Korea.
authors.forename: Ji Hyun
authors.initials: JH
authors.lastname: Lee
authors.affiliation: 1 Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul 135-710, Korea.
authors.forename: Young Cheol
authors.initials: YC
authors.lastname: Yoon
authors.affiliation: 1 Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul 135-710, Korea.
authors.forename: Ki Jeong
authors.initials: KJ
authors.lastname: Park
authors.affiliation: 2 Department of Orthopedic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
authors.forename: Joon Ho
authors.initials: JH
authors.lastname: Wang
mesh_terms: D000273:Adipose Tissue / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007089:Image Enhancement; D021621:Imaging, Three-Dimensional; D007593:Joint Instability / Q000000981:diagnostic imaging* / Q000209:etiology / Q000473:pathology / Q000601:surgery; D007719:Knee Joint / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013382:Subtraction Technique; D000070600:Tibial Meniscus Injuries / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D055815:Young Adult
keywords: MRI; fat suppression; knee