title: Different enhancement of the hepatic parenchyma in dynamic CT for patients with normal liver and chronic liver diseases and with the dose of contrast medium based on body surface area.
abstract: OBJECTIVE
  The purpose of this study was to characterize hepatic parenchymal enhancement for normal and diseased liver in dynamic computed tomography (CT) with the dose of contrast medium calculated on the basis of body surface area (BSA).
  
  
  METHODS
  The records of 328 consecutive patients who underwent triple-phase contrast-enhanced CT were retrospectively reviewed. The patients were divided into four groups: normal liver (n = 125), chronic hepatitis (CH) (n = 92), Child-Pugh grade A liver cirrhosis (LC-A) (n = 78), and Child-Pugh grade B liver cirrhosis (LC-B) (n = 33). All patients received 22 g I m(-2) as contrast material, calculated on the basis of BSA. CT values were measured in the region of interest during the pre-contrast, arterial, and portal phases, and the change in the CT value (ΔHU, where HU is Hounsfield units) compared with pre-contrast images was calculated.
  
  
  RESULTS
  Mean ΔHU for the hepatic parenchyma for the normal liver, CH, LC-A, and LC-B groups during the portal phase was 55.5 ± 11.8 HU, 55.2 ± 12.5 HU, 50.0 ± 13.0 HU, and 43.0 ± 12.7 HU, respectively; generalized estimating equation analysis showed the differences were significant (p < 0.01).
  
  
  CONCLUSIONS
  Hepatic parenchymal enhancement during the portal phase decreased as the severity of chronic liver damage increased.
authors: Department of Radiology, Ehime University Graduate School of Medicine, 454 Shitukawa, Toon, Ehime, 791-0925, Japan, gkoiwa@m.ehime-u.ac.jp.
authors: Gen
authors: G
authors: Koiwahara
authors: Takaharu
authors: T
authors: Tsuda
authors: Megumi
authors: M
authors: Matsuda
authors: Masaaki
authors: M
authors: Hirata
authors: Hiroaki
authors: H
authors: Tanaka
authors: Tomoko
authors: T
authors: Hyodo
authors: Teruhito
authors: T
authors: Kido
authors: Teruhito
authors: T
authors: Mochizuki
mesh_terms: D000368:Aged; D001706:Biopsy; D001830:Body Surface Area; D003287:Contrast Media / Q000008:administration & dosage; D005260:Female; D006521:Hepatitis, Chronic / Q000000981:diagnostic imaging*; D006801:Humans; D008099:Liver / Q000000981:diagnostic imaging*; D008103:Liver Cirrhosis / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed / Q000379:methods*
chemical_list: D003287:Contrast Media