脑梗死所致胼胝体离断的磁共振成像

MRI of callosal disconnection due to cerebral infarction.

作者信息

Momose T, Yoshikawa K, Bandoh M, Iwata M, Iio M

出版信息

Radiat Med. 1986 Jan-Mar;4(1):8-11.

Abstract

Magnetic resonance imaging (MRI) was performed to study two cases of callosal disconnection due to cerebral infarction. Both cases had pure alexia and right homonymous hemianopsia. Midsagittal inversion recovery (IR) images demonstrated that the corpus callosum was completely intact, and coronal IR images revealed involvement of the lingual gyrus, fusiform gyrus, forceps major, inferior longitudinal fascicle, and optic radiation in the dominant cerebral hemisphere in both cases. Midline sagittal images provided direct visualization of the corpus callosum but did not provide sufficient information for the study of callosal disconnection syndromes. Coronal reconstructions aided in visualizing the relationship of lesions to the adjacent structures of cerebral white and gray matter. MRI may be one of the most useful tools for understanding the process of interhemispheric transference of information.

摘要

采用磁共振成像（MRI）对两例因脑梗死导致胼胝体离断的病例进行研究。两例患者均有纯失读症和右侧同向性偏盲。矢状位中线反转恢复（IR）图像显示胼胝体完全完整，冠状位IR图像显示两例优势半球的舌回、梭状回、胼胝体压部、下纵束和视辐射均有受累。中线矢状位图像可直接观察胼胝体，但对于胼胝体离断综合征的研究提供的信息不足。冠状位重建有助于观察病变与脑白质和灰质相邻结构的关系。MRI可能是理解半球间信息传递过程最有用的工具之一。