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目的研究脑后部可逆性脑病综合征(PRES)的MRI表现。方法分析13例PRES患者的磁共振表现,总结其特点。结果 13例患者MRI均发现异常。病变位于双侧额、顶、枕、颞叶脑7例,位于双侧顶、枕叶5例,位于双侧枕叶1例。病变表现为长T1长T2信号11例,长T1长T2信号中混杂斑点状短T1短T2信号2例。3例患者磁共振扩散加权成像(DWI)序列病变呈高信号,1例呈稍高信号,9例呈等信号。预后良好。结论 PRES影像学表现具有特征性,结合特定病史及常见临床表现,可早期做出正确诊断。
Objective To study the MRI manifestations of posterior retronective encephalopathy syndrome (PRES). Methods MRI findings of 13 cases of PRES were analyzed and their characteristics were summarized. Results MRI was abnormal in all 13 patients. The lesions were located in bilateral frontal, top, occipital and temporal lobes in 7 cases, located on both sides of the top, occipital lobe in 5 cases, located in bilateral occipital lobe in 1 case. Lesions manifested as long T1 long T2 signal in 11 cases, long T1 long T2 signal mixed short spot short T2 signal in 2 cases. Three patients had high signal intensity in diffusion weighted imaging (DWI) sequence, one slightly higher signal and 9 equal signal. The prognosis is good. Conclusions The PRES imaging features are characteristic. Combined with specific medical history and common clinical manifestations, correct diagnosis can be made early.