弥散加权磁共振成像可对短暂性全面性遗忘症中的缺血性病变进行特征性描述。
Diffusion-weighted MRI characterizes the ischemic lesion in transient global amnesia.
作者信息
Ay H, Furie K L, Yamada K, Koroshetz W J
机构信息
Stroke Service of the Neurology Department, Massachusetts General Hospital, Harvard Medical School, Boston 02114, USA.
出版信息
Neurology. 1998 Sep;51(3):901-3. doi: 10.1212/wnl.51.3.901.
We present a patient with transient global amnesia (TGA) whose diffusion-weighted MRI (DWI) showed increased signal in the splenium of the corpus callosum and in the left parahippocampal gyrus. The absence of high signal on the corresponding apparent diffusion coefficient (ADC) images supports the diagnosis of an acute infarction. This finding provides a temporal relation between cerebral ischemia and infarction in the territory of posterior cerebral artery and in certain cases of TGA. An early means of detecting ischemia in TGA by DWI may influence clinical decisions made in patient evaluation and management.
我们报告一例短暂性全面性遗忘症（TGA）患者，其磁共振成像扩散加权成像（DWI）显示胼胝体压部和左侧海马旁回信号增强。相应的表观扩散系数（ADC）图像上无高信号支持急性梗死的诊断。这一发现揭示了大脑后动脉供血区域脑缺血与梗死之间的时间关系，以及某些TGA病例中的这种关系。通过DWI早期检测TGA中的缺血情况可能会影响患者评估和管理中的临床决策。
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