中文摘要：

肝性脑病是各种严重肝脏疾病所致的中枢神经系统功能失调综合征。目前运用脑功能成像技术尤其是PET、fMRI来研究肝性脑病脑功能代谢及认知功能的改变已经成为一大热点。本文就PET和fMRI在肝性脑病中的研究做一综述。

英文摘要：

Hepatic encephalopathy （HE） is a central nervous system dysfunction syndrome caused by various kinds of serious liver diseases. At present,the use of brain functional imaging technology,especially PET and fMRI to study brain functional metabolism and cognitive function of patients with HE has become a hot topic. Progresses of PET and fMRI researches about HE were reviewed in this paper.