The purpose of this study is to explore the long-term consequences of neuroimaging and perceived cognitive dysfunction in obstetrics posterior reversible encephalopathy syndrome.

This is a prospective study. The investigators divided the PE or E patients into two groups, namely PRES group and non-PRES group, according to diagnostic criteria . The general information（demographic data，blood pressure.etc.）and blood sample will be collected. Additionally,all patients receive neuroimaging examination（DTI,ASL,3D-TMI.etc.）and neuro-cognitive test（MMSE,MOCA,CFQ, etc.） to assess the cerebral white matter lesions and cognitive changes.

Inclusion Criteria:

1. patients were diagnosed of PE or E
2. patients received cranial image examination
3. patients consent to participate

Exclusion Criteria:

1. patients combined other neurological diseases
2. patients combined mental illness

We divided the PE or E patients into two groups, namely PRES group and non-PRES group, according to diagnostic criteria . the general information（demographic data，blood pressure.etc.）and blood sample will be collected.