儿童脑室周围白质软化症的MRI特征分析

The MRI characteristics of periventricular leukomalacia in children

目的探讨儿童脑室周围白质软化症(PVL)的MRI特征。方法对39例PVL的临床资料进行回顾分析。结果39例PVL的MRI表现：(1)脑白质减少：单纯在三角区12例,三角区和半卵圆中心7例。(2)病灶形态：斑片状20例,斑点状13例,条纹状6例。(3)病灶信号：呈长T1或等T1、长T2变化。(4)脑室扩大：侧脑室体部31例,三角部扩大8例。(5)脑室形态不规则11例。(6)其他：外侧裂加深加宽4例,胼胝体发育不良2例。结论MRI是早期诊断PVL的方法,可清楚显示PVL的病变程度与范围。

Objective To investigate the MRI characteristics of periventricular leukomalacia in children. Methods The clinical datas of 39 cases of PVL were retrospectively analyzed. Results MRI manifestation ： （ 1 ） quantitative reduction of white matter： only in trigonal area 12 cases; at trigonal and semiovale center 7 cases. （2） Foci form：patchy areas in 20 cases;punctate areas 13 cases;streake in 6 cases. （3）The signal of the focus：hyperintense/intense on T1 weighted and hyperintense on T2 weighted. （4）Ventricular enlarged：body of lateral ventricle 31 cases, triangular part 8 cases. （ 5 ） Ventricular appearance irregular 11 cases. （6） Others： corpus callosum dysplasia 2 cases. 4 cases bilateral lateral fissure deepened and widened. Conclusion MRI is a way to diagnose PVL in early, level and scope of focus of PVL can be clearly displayed by MRI.