title: Cystic ovarian lesions in SSFP diffusion imaging.
abstract: OBJECTIVE
  MR assessments of ovarian cystic lesions are usually based on morphological features, signal intensities and enhancement with contrast media. This study was performed to evaluate the usefulness of the steady-state free precession (SSFP) diffusion imaging of cystic ovarian lesions for analyzing cystic contents.
  
  
  METHODS
  Sixty-one ovarian cystic lesions in 37 patients were examined. The diffusion-related coefficient (DRC) and the ratio of the relative apparent diffusion coefficient of the lesion to that of subcutaneous fat tissue (rADC(L)/rADC(F)) were calculated from SSFP diffusion images.
  
  
  RESULTS
  The DRCs and the rADC(L)/rADC(F) ratios in endometrial cysts and in the fatty parts of dermoid cysts were significantly lower than in other cystic tumors.
  
  
  CONCLUSIONS
  SSFP diffusion imaging can be included in clinical practice to analyze ovarian cystic lesions within a short scan time; the DRC and the rADC(L)/rADC(F) ratio are useful for evaluating cystic contents.
authors.affiliation: Division of MR imaging, Department of Radiology, Tenri Hospital, Kobe University School of Medicine, 7-5-2 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan. ykaji@med.kobe-u.ac.jp
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Kaji
authors.forename: Michimasa
authors.initials: M
authors.lastname: Matsuo
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Matsuki
authors.forename: Masumi
authors.initials: M
authors.lastname: Yoshida
authors.forename: Michiharu
authors.initials: M
authors.lastname: Hayashi
authors.forename: Hidetaka
authors.initials: H
authors.lastname: Nanno
authors.forename: Masafumi
authors.initials: M
authors.lastname: Koshiyama
authors.forename: Haruko
authors.initials: H
authors.lastname: Fujii
authors.forename: Katsuya
authors.initials: K
authors.lastname: Maruyama
authors.forename: Osamu
authors.initials: O
authors.lastname: Takizawa
authors.forename: Kazuro
authors.initials: K
authors.lastname: Sugimura
mesh_terms: D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D038524:Diffusion Magnetic Resonance Imaging; D005260:Female; D006801:Humans; D008875:Middle Aged; D010048:Ovarian Cysts / Q000473:pathology*; D010051:Ovarian Neoplasms / Q000473:pathology*