title: Diagnostic performance of diffusion-weighted MRI in the diagnosis of ovarian torsion: comparison of torsed and nonaffected ovaries.
abstract: BACKGROUND
  The aim of this study was to evaluate the role of diffusion-weighted magnetic resonance imaging (MRI) in the diagnosis of ovarian torsion.
  
  
  METHODS
  We retrospectively identified 84 patients with surgically confirmed ovarian torsion. Seventeen patients with unclear ultrasound findings underwent MRI examination with two different magnetic resonance (MR) systems.
  
  
  RESULTS
  In ovarian torsion, the mean apparent diffusion coefficient (ADC) value of the torsed ovary was significantly lower than that of the nonaffected ovary in both MR systems (n=17; 0.898±0.539 vs. 1.615±0.469×10(-3)mm(2)/s; P<.001).
  
  
  CONCLUSIONS
  ADC comparisons were useful for detecting ovarian torsion.
authors.affiliation: Department of Radiology, Faculty of Medicine, Ondokuz Mayis University, Samsun, Turkey. Electronic address: tmybkc@gmail.com.
authors.forename: Tumay
authors.initials: T
authors.lastname: Bekci
authors.affiliation: Department of Radiology, Faculty of Medicine, Ondokuz Mayis University, Samsun, Turkey. Electronic address: veyselp@hotmail.com.
authors.forename: Ahmet Veysel
authors.initials: AV
authors.lastname: Polat
authors.affiliation: Department of Radiology, Faculty of Medicine, Ondokuz Mayis University, Samsun, Turkey. Electronic address: mdkerim@hotmail.com.
authors.forename: Kerim
authors.initials: K
authors.lastname: Aslan
authors.affiliation: Department of Medical Biostatistics, Faculty of Medicine, Ondokuz Mayis University, Samsun, Turkey. Electronic address: lemantomak55@gmail.com.
authors.forename: Leman
authors.initials: L
authors.lastname: Tomak
authors.affiliation: Department of Radiology, Faculty of Medicine, Ondokuz Mayis University, Samsun, Turkey. Electronic address: drmceyhan@hotmail.com.
authors.forename: Meltem
authors.initials: M
authors.lastname: Ceyhan Bilgici
authors.affiliation: Department of Radiology, Faculty of Medicine, Ondokuz Mayis University, Samsun, Turkey. Electronic address: danacim55@gmail.com.
authors.forename: Murat
authors.initials: M
authors.lastname: Danaci
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D002648:Child; D002675:Child, Preschool; D038524:Diffusion Magnetic Resonance Imaging; D005260:Female; D006801:Humans; D007223:Infant; D008875:Middle Aged; D010049:Ovarian Diseases / Q000000981:diagnostic imaging*; D010053:Ovary / Q000000981:diagnostic imaging*; D012189:Retrospective Studies; D014102:Torsion Abnormality / Q000000981:diagnostic imaging*; D055815:Young Adult
keywords: Apparent diffusion coefficients; Diffusion weighted imaging; Emergency; Magnetic resonance imaging; Ovarian torsion