title: Application of two-phase helical CT in liver neoplasms.
abstract: OBJECTIVE
  To assess the value of helical CT in the diagnosis of liver diseases.
  
  
  METHODS
  59 patients with different liver diseases were examined by two-phase or multi-phase dynamic helical CT.
  
  
  RESULTS
  Small hepatocellular carcinoma showed a higher density in the arterial phase, and a lower density in the portal vein phase. Large hepatic carcinoma showed a mixed pattern of higher-density in the arterial phase, and a lower density in the portal vein phase. Metastasis carcinoma showed an "oxeye sign" in the portal vein phase. Hemangioma was not obviously enhanced in the early arterial phase, marginally enhanced in the arterial phase, and equally-densed in the balanced phase.
  
  
  CONCLUSIONS
  Two-phase helical CT is of value in improving the detection rate of or determining the features of hepatic diseases by two-phase helical dynamic scan (2.0-3.0 ml/s speed, and delay time 25-30 s and 70-85 s).
authors: Department of Radiology, General Hospital of Chengdu Military Command, PLA, Chengdu 610083, China. xuyuanch@mail.sc.cninfo.net
authors: Yuan-Chang
authors: YC
authors: Xu
authors: Ming
authors: M
authors: Gu
authors: Kai-Xiang
authors: KX
authors: Wang
authors: Ai-Hua
authors: AH
authors: Guo
authors: Zong-Li
authors: ZL
authors: Ma
mesh_terms: D000328:Adult; D000368:Aged; D002277:Carcinoma / Q000000981:diagnostic imaging* / Q000556:secondary*; D006528:Carcinoma, Hepatocellular / Q000000981:diagnostic imaging*; D005260:Female; D005706:Gallbladder Neoplasms / Q000000981:diagnostic imaging; D006391:Hemangioma / Q000000981:diagnostic imaging*; D006801:Humans; D008113:Liver Neoplasms / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness / Q000000981:diagnostic imaging; D036542:Tomography, Spiral Computed