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目的评价磁共振弥散加权成像在反复发作性脑梗死诊断中的应用价值。方法对97例临床反复发作性脑梗死的患者进行头颅CT及MRI中的T_1WI、T_2WI、DWI、FLAIRWI的检查后。在DWI异常信号发生的部位与临床表现进行对比。结果97例MRI检查中,在DWI上均有高信号和低信号,6例超急性期脑梗死在DWI上显示高信号,而T_2WI及FLAIRWI未能显示,脑梗死急性期DWI均表现为高信号,亚急性期多数表现为高信号或略高信号,在DWI上出现高信号或略高信号的部位与临床表现相符的有77例。结论 DWI序列在临床诊断脑梗死中起着重要作用,在早期急性脑梗死显示能力优于常规序列,它能区分新旧梗死,有助于责任病灶的检出。对临床治疗有十分重要意义。但须结合常规序列及临床病史进行综合分析判断才能作出正确的诊断。
Objective To evaluate the value of MR diffusion weighted imaging in the diagnosis of recurrent cerebral infarction. Methods 97 cases of patients with recurrent cerebral infarction after head CT and MRI T_1WI, T_2WI, DWI, FLAIRWI examination. The location of abnormal signal in DWI was compared with clinical manifestations. Results In 97 cases of MRI examination, both high signal and low signal were found on DWI, 6 cases of hyperacute cerebral infarction showed high signal on DWI, while T 2 WI and FLAIRWI failed to show that DWI of acute cerebral infarction showed high signal , Subacute most of the performance of high signal or slightly higher signal in DWI appear high signal or slightly higher signal site consistent with the clinical manifestations of 77 cases. Conclusion The DWI sequence plays an important role in the clinical diagnosis of cerebral infarction. It shows better ability in early stage of acute cerebral infarction than conventional sequence. It can differentiate new infarction from old infarction and contribute to the detection of responsible lesion. Clinical treatment is very important. However, combined with conventional sequences and clinical history of a comprehensive analysis to determine the correct diagnosis can be made.