脑“白质高信号半暗带”

高 德瑜, 王 余
华北理工大学 河北唐山 063000

摘要

目的：尽管脑“白质高信号半暗带”（WhiteMatterHyperintensitiesPenumbra，WMH半暗带），尚无标准的定义，但围绕WMH周围存在“WMH半暗带”已被广泛接受。本综述认为脑WMH半暗带是指脑WMH周围与WMH改变相似，但程度更轻微，易受损伤的脑组织。这种定义隐含着几个次要概念。①WMH半暗带与WMH相似、但程度更轻，围绕着白质损伤核心，可随时间的推移缓慢地向WMH演变或诱导其它损伤，且该过程是不均匀、多样、非线性演变的，具有异质性。②WMH半暗带是四维的，其损伤具有一定范围、可能可逆，与临床相关。

关键词

白质高信号；半暗带；特征

参考

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