Acta Academiae Medicinae Sinica

Acta Academiae Medicinae Sinica

Acta Academiae Medicinae Sinica ›› 2018, Vol. 40 ›› Issue (6): 809-816.doi: 10.3881/j.issn.1000-503X.11033

• Original Articles • Previous Articles     Next Articles

Gadolinium Ethoxybenzyl Diethylene-triamine-pentaacetic-acid-enhanced Magnetic Resonance Imaging Perfusion and Multiple Hepatobiliary-phase Imaging for Quantitative Assessment of Liver Fibrosis in Rat Models

XU Jia1,WANG Xuan1(),YOU Yan2,XUE Huadan1,WANG Qin1,WANG Shitian1,JIN Zhengyu1   

  1. 1Department of Radiology,Beijing 100730,China
    2Department of Pathology,PUMC Hospital,CAMS and PUMC,Beijing 100730,China
  • Received:2018-11-22 Online:2018-12-20 Published:2019-01-03
  • Supported by:
    Supported by the National Natural Sciences Foundation of China (Young Scientists Foundation)(81501446);the National Public Welfare Basic Scientific Research Program of Chinese Academy of Medical Sciences(2018PT32003);the National Public Welfare Basic Scientific Research Program of Chinese Academy of Medical Sciences(2017PT32004)

Abstract:

Objective To investigate the value of gadolinium ethoxybenzyl diethylene-triamine-pentaacetic-acid (Gd-EOB-DTPA)-enhanced magnetic resonance imaging (MRI) in detecting different stages of liver fibrosis in rats.
Methods Rat models of liver fibrosis were induced by carbon tetrachloride intraperitoneal injection for 4 - 12 weeks (n=45). The control group was applied with 0.9% saline (n=15). The MRI protocol contained both dynamic contrast-enhanced sequence (60 continuous scans within 3 minutes,including three pre-contrast measurements) and multiple hepatobiliary-phase acquisitions (every 5 minutes after contrast injection,60 minutes in total). METAVIR score was used to grade liver fibrosis:normal (F0),mild fibrosis (F1 - F2),and advanced fibrosis (F3 - F4). Liver perfusion parameters [transfer constant (K trans),extravascular extracellular volume fraction (Ve),initial area under curve (iAUC),maximum relative enhancement (REmax),and time of maximum RE (Tmax)] as well as hepatobiliary-phase parameters [RE at different time point,the decrease of RE (REchange=RE3 min - RE60 min),and elimination half-life of RE (TRE1/2)] were measured and compared with ANOVA analysis and Spearman rank correlation.
Results Thirty-one rats completed MRI exams and were then divided into normal (n=10),mild fibrosis (n=10),and advanced fibrosis (n=11) groups. K trans,Ve and iAUC decreased as liver fibrosis progressed (r=-0.631,P=0.002;r=-0.503,P=0.017;r=-0.446,P=0.037). K trans and Ve showed significant differences among three groups(F=7.011,P=0.005;F=4.656,P=0.023). K trans and Ve were significantly lower in advanced fibrosis group than in normal group (P=0.001,P=0.009). There were statistical significant differences of Tmax,TRE1/2 and REchange among groups(F=6.633,P=0.005;F=5.493,P=0.010;F=5.343,P=0.014). Compared to normal and mild fibrosis groups,advanced fibrosis group had significantly longer Tmax and TRE1/2 (P=0.005,P=0.004;P=0.008,P=0.008)and significantly lower REchange(P=0.007,P=0.012).
Conclusion Perfusion and multi-hepatobiliary-phase parameters such as K trans,Ve,Tmax, TREI/2 and REchange obtained from Gd-EOB-DTPA-enhanced MRI,may be valuable for detecting and staging liver fibrosis.

Key words: liver fibrosis, gadolinium ethoxybenzyl diethylene-triamine-pentaacetic-acid, magnetic resonance imaging, perfusion-weighted imaging, hepatobiliary phase

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