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发育期脑外间隙在2岁内尤其1岁内变化较大,脑外间隙扩大包括蛛网膜下腔和硬膜下腔的扩大,以前者为主。正常小儿脑外间隙有一个发育性的扩大过程,属于正常生理现象,因此不能将正常发育所致的脑外间隙扩大误为病理性的扩大即脑外积液;而判断脑外积液也一定要结合脑发育的过程。MR I可以明确显示小儿脑外间隙的扩大,判断脑外积液的性质是硬膜下积液还是蛛网膜下腔积液,并对判断引起脑外积液的原因,找出原发病有极大的帮助。本文对小儿脑外间隙扩大的MR I研究进展情况进行了介绍。
Developmental extracerebral space in 2 years of age, especially within 1 year of great changes in the expansion of extracerebral space, including subarachnoid and subdural expansion, the former dominated. Normal child brain gap has a developmental expansion process, is a normal physiological phenomenon, it can not be normal development due to the expansion of extracerebral space mistaken for the pathological expansion of extrahepatic effusion; and to determine the effusion is also a certain To combine the process of brain development. MR I can clearly show the expansion of children with extracranial space to determine the nature of extracerebral effusion is subdural effusion or subarachnoid effusion, and to determine the cause of extra-cerebral fluid to find out the primary disease Great help. This article describes the progress of MR I studies in children with extracerebral space enlargement.