title: [Quantitative study of diffusion weighted imaging on magnetic resonance imaging in focal hepatic lesions less than 3 cm].
abstract: OBJECTIVE
  To evaluate the characteristics of MR imaging of hepatic lesions using measurement of apparent diffusion coefficient (ADC) value of hepatic lesions on diffusion weighted imaging.
  
  
  METHODS
  MR diffusion weighted images were obtained in patients with 97 hepatic lesions (22 hepatocellular carcinomas, 21 metastatic tumors, 28 hemangiomas, 26 cysts). ADC values were evaluated with different sequences. The ADC ratio of lesion/liver was estimated.
  
  
  RESULTS
  Average ADC values of hepatic lesions were as follows: carcinomas (0.91 +/- 0.07) x 10(-3) mm(2)/s, metastatic tumors (1.13 +/- 0.27) x 10(-3) mm(2)/s, cavernous hemangiomas (1.94 +/- 0.37) x 10(-3) mm(2)/s, cysts (3.26 +/- 0.30) x 10(-3) mm(2)/s. The ADC ratio of lesion/liver was significantly different between primary carcinomas and metastatic tumors (P < 0.05).
  
  
  CONCLUSIONS
  Quantitative study in hepatic lesions using ADC values and the ADC ratio of lesion/liver, would improve the accuracy in diagnosing hepatic lesions.
authors.affiliation: Imaging Center, The Affiliated Zhujiang Hospital of The First Military Medical University, Guangzhou 510282, China.
authors.forename: Xi-Jie
authors.initials: XJ
authors.lastname: Sun
authors.forename: Xian-Yue
authors.initials: XY
authors.lastname: Quan
authors.forename: Wen
authors.initials: W
authors.lastname: Liang
authors.forename: Zhi-Bo
authors.initials: ZB
authors.lastname: Wen
authors.forename: Sheng
authors.initials: S
authors.lastname: Zeng
authors.forename: Fan-Heng
authors.initials: FH
authors.lastname: Huang
authors.forename: Ming
authors.initials: M
authors.lastname: Tang
mesh_terms: D003560:Cysts / Q000175:diagnosis; D003937:Diagnosis, Differential; D004058:Diffusion; D006392:Hemangioma, Cavernous / Q000175:diagnosis; D006801:Humans; D008099:Liver / Q000473:pathology*; D008113:Liver Neoplasms / Q000175:diagnosis* / Q000556:secondary; D008279:Magnetic Resonance Imaging