胼胝体梗死的MRI表现及其诊断价值

目的：探讨胼胝体梗死的MRI表现特征及其诊断价值。方法：在连续2年颅脑MRI检查中搜集569例脑梗死病例．对其中有胼胝体梗死的36例进行回顾性分析。全部病例均行sE与TSE序列T1WI、T2wI扫描，15例加FLAIR序列扫描，l3例行钆喷替酸葡甲胺(GdDTPA)增强扫描。结果：569例脑梗死中36例(6．3％)MRI确诊为胼胝体梗死。其中3例为单纯胼胝体梗死，33例同时伴其它部位脑梗死。36例共45个梗死灶，位于胼胝体膝部19个，体部15个，压部10个，膝体部1个。T1WI呈略低信号26个，低信号19个，T2wI均呈高信号；15例FLAIR序列11例呈高信号，4例呈低信号；13例增强扫描9例强化。结论：胼胝体梗死少见。MRI可清楚显示胼胝体梗死的存在、部位与范围，但缺乏特征性，结合临床及脑内其它部位梗死灶并存可确定诊断。

Corpus callosal infarction:appearances and diagnostic value of MR imaging

Objective:To investigate the features and diagnostic value of MRI in corpus callosal infarction.Methods:MRI features of 36 patients with corpus callosal infarction were retrospectively analyzed,which were selected from 569 consecutive cranial MR scans showing cerebral infarcts.SE and TSE sequences were performed on all 36 cases,FLAIR on 15 of them,Gd DTPA enhancement examinations were performed in 13 cases.Results:Of 569 patients with cerebral infarcts collected during the 24 months,36 patients (6.3%) had a MRI identificable callosal infarction.In 3 cases the infarction located only in the corpus callosum,in 33 cases the lesion associated with cerebral infarct in other location.Totally 45 lesions were found in 36 cases,The lesions appear slight hypointense (26) or hypointense (19) on T 1WI,all of them appear hyperintense on T 2WI and some hyperintense or hypointense on FLAIR.Conclusion:Infarcts of the corpus callosum are not common.MRI can clearly reveal the lesions,their location and extent.But MRI findings of corpus callosal infarction are nonspecific,definite diagnosis of corpus callosal infarction depends on combination of clinical data and existence of infarction in the other area of brain.