CT、MRI诊断超急性期脑梗死和急性期脑出血的临床价值分析

Clinical Value Analysis of CT and MRI in the Diagnosis of Hyperacute Cerebral Infarction and Acute Cerebral Hemorrhage

分别采用CT和MRI诊断超急性期脑梗死和急性期脑出血患者,分析两种影像,以判断两种诊断方法的准确率.结果显示,超急性期脑梗死磁共振弥散加权像(DWI)上呈明显异常高信号,CT未见明显异常显像;急性脑出血CT有明确诊断,MRI信号复杂,需与CT对比分析做出判断.得出结论,CT对急性期脑出血检查可明确诊断,但对超急性期脑梗死患者诊断并不理想;MRI常规序列检查对急性期脑出血患者均表现为等信号或稍低信号、或不敏感,而建立在MRI基础上的磁共振弥散加权成像(DWI)对超急性期脑梗死患者的检出率高达100%.因此,一般认为,MRI在超急性期脑梗死与急性期脑出血中的诊断率均明显高于CT,尤其对超急性期脑梗死的诊断更具有优势.

CT and MRI were used to diagnose patients with hyperacute cerebral infarction and acute cerebral hemorrhage respectively.Two kinds of images were analyzed to judge the accuracy of the two diagnostic methods.The results show that there was significant abnormal high signal on diffusion weighted magnetic resonance imaging(DWI) in hyperacute cerebral infarction,but no abnormal image on CT;acute cerebral hemorrhage has definite diagnosis on CT and complex signal on MRI,which needs to be judged by comparative analysis with CT.Conclusion: CT can clearly diagnose acute cerebral hemorrhage,but it is not ideal for hyperacute cerebral infarction patients;routine sequence examination of MRI showed equal signal or slightly low signal or insensitive to acute cerebral hemorrhage.The detection rate of diffusion weighted imaging(DWI) based on MRI for hyperacute cerebral infarction was as high as 100%.Therefore,it is generally believed that the diagnostic rate of MRI in hyperacute cerebral infarction and acute cerebral hemorrhage is significantly higher than that of CT,especially in hyperacute cerebral infarction.