Band heterotopia is diagnosed by visualization on MRI of a smooth layer of gray matter separated from the cortex and ventricles by white matter.
带状异位在MRI上表现为一个平滑的灰质带位于脑室和皮质之间，中间夹以脑白质。
There are three clinically useful classifications of gray matter heterotopia: subependymal, band, and subcortical heterotopia.
临床上有三种分类：室管膜下、带状、皮层下灰质异位。
Objective To evaluate the role of MRI in diagnosis and differential diagnosis of gray matter heterotopia(GMH).
目的探讨脑灰质异位症（GMH）的MR I诊断及鉴别诊断。
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