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目的探讨MRI磁敏感加权成像(SWI)在脑出血中的应用价值。方法对12例经CT确诊的脑出血患者于发病2 d内及2周后分别进行MRI常规序列及SWI扫描,并进行血肿分期及对各序列的病灶显示率、微出血灶的分布和出血量评估。结果在12例脑出血患者中,共发现33处出血灶。SWI、T1WI、T2WI、Flair序列对脑出血病灶检出率分别为100%、36.4%、45.5%、45.5%;SWI序列的检出率显著高于MRI其他常规序列(均P<0.05)。6例患者在SWI序列上发现微出血灶,其中基底节6处,小脑3处,脑干1处,丘脑2处,大脑皮质下2处。入院2 d内查MRI示急性期血肿3例,亚急性早期血肿9例,复查后均显示为亚急型晚期血肿。CT与SWI 2 d内测得的出血量差异有统计学意义(均P<0.05)。结论 SWI是一种显示少量脑出血的有效检查方法。
Objective To explore the value of MRI magnetic resonance weighted imaging (SWI) in cerebral hemorrhage. Methods Twelve patients with cerebral hemorrhage diagnosed by CT were examined by MRI and SWI respectively within 2 days and 2 weeks after the onset of disease. The hematoma staging and the rate of lesion showed, the distribution of microbleeds and the amount of bleeding Evaluation. Results In 12 patients with cerebral hemorrhage, a total of 33 hemorrhagic foci were found. The detection rates of SWI, T1WI, T2WI and Flair were 100%, 36.4%, 45.5% and 45.5% respectively. The detection rate of SWI was significantly higher than that of other MRI sequences (all P <0.05). Six patients were found on the SWI sequence micro-hemorrhage, including basal ganglia 6, 3 cerebrums, 1 brain stem, 2 thalamus, 2 cerebral cortex. 2 days after admission MRI examination showed acute hematoma in 3 cases, subacute early hematoma in 9 cases, after the review showed subacute type of advanced hematoma. There was a significant difference in the amount of bleeding measured between CT and SWI within 2 days (all P <0.05). Conclusion SWI is an effective test to show a small amount of intracerebral hemorrhage.