Fig. 2
Cranial MRI of a 31-year-old woman with preeclampsia with PRES: a axial T2W FLAIR-SPIR, b axial DWI with b value of 1000 s/mm2, and c axial ADC map. SBE was evaluated according to the distribution and degree of abnormal edema signal, which presented as heterogeneous hyperintense signals (arrow) on T2W FLAIR-SPIR (a). Large area fusions of abnormal edema signals were shown in the right occipital and temporal lobes; and multiple flecks, patches, or nodules of abnormal signals without fusion were seen in the left basal ganglia, right parietal lobe, left occipital, temporal and frontal lobes. The SBE of typical regions, atypical regions, and all regions in this patient were 7, 9, and 16, respectively. The abnormal edema signals presented as isointense signals (arrow) on DWI (b) and as hyperintense signals (arrow) on ADC map (c)