title: MR imaging of ovarian hemorrhage.
abstract: BACKGROUND
  To review MR appearances of ovarian hemorrhage, and to describe its characteristic imaging findings.
  
  
  METHODS
  12 women (age range, 20-44, mean, 26 years) with suspected ovarian hemorrhage underwent pelvic MR examinations. We retrospectively reviewed MR findings regarding signal intensities, localization, and wall enhancement of adnexal masses, and signal intensities of ascites.
  
  
  RESULTS
  Adnexal masses were detected in all cases. In eight cases, adnexal mass exhibited intermediate signal intensity on T1WI, and intermediate to low signal intensity on T2WI. In other case, adnexal mass exhibited marked hyperintensity on T1WI. In the remaining three cases, cystic mass with low signal intensity on T1WI and high signal intensity on T2WI was noted. Ascites was present in all cases, and showed intermediate signal on T1WI and intermediate to low signal on T2WI.
  
  
  CONCLUSIONS
  In ovarian hemorrhage, hemorrhagic ascites and adnexal mass was visualized with specific MR signal intensity. Due to its sensitivity for identifying blood, MR imaging is useful in the diagnosis of ovarian hemorrhage, especially when ultrasonography findings are not definitive.
authors.affiliation: Department of Radiology, Kyoto City Hospital, 1-2 Higashi-takada-cho, Mibu, Nakagyo-ku, Kyoto 604-8845, Japan. mizuki@mbox.kyoto-inet.or.jp
authors.forename: Mizuki
authors.initials: M
authors.lastname: Nishino
authors.forename: Katsumi
authors.initials: K
authors.lastname: Hayakawa
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Iwasaku
authors.forename: Kaori
authors.initials: K
authors.lastname: Togashi
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Ueda
authors.forename: Tadashi
authors.initials: T
authors.lastname: Sago
authors.forename: Masato
authors.initials: M
authors.lastname: Noguchi
mesh_terms: D000291:Adnexal Diseases / Q000175:diagnosis*; D000328:Adult; D001201:Ascites / Q000175:diagnosis; D003287:Contrast Media; D003937:Diagnosis, Differential; D005260:Female; D019786:Gadolinium DTPA; D006470:Hemorrhage / Q000175:diagnosis*; D006801:Humans; D008279:Magnetic Resonance Imaging; D010049:Ovarian Diseases / Q000175:diagnosis*; D012189:Retrospective Studies
chemical_list: D003287:Contrast Media; D019786:Gadolinium DTPA