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目的探讨MR磁敏感加权成像(SWI)在脑梗死治疗前后随访中的应用价值。资料与方法搜集经临床及影像学检查证实的脑梗死患者资料30例,急性13例,亚急性17例。所有患者治疗前后均行常规MR平扫、扩散加权成像(DWI)及SWI扫描。对比分析治疗前后MRI图像变化特点。结果治疗前常规MRI检出脑梗死灶内出血4例,SWI检出9例,治疗后SWI显示5例发生出血性转化。治疗前30例脑梗死灶SWI图像相对信号强度为0.97±0.09,治疗后相对信号强度为1.06±0.12,治疗前后相对信号强度差异有统计学意义(t=-3.579,P<0.05)。治疗前后脑梗死灶内血管的显示差异有统计学意义(P<0.05)。结论SWI对于显示脑梗死伴发出血、治疗后出血性转化、侧支血管构建等方面优于常规MRI序列,在脑梗死治疗后随访中具有重要的临床应用价值。
Objective To investigate the value of MR magnetic resonance weighted imaging (SWI) in the follow-up of cerebral infarction before and after treatment. Materials and Methods 30 cases of cerebral infarction patients confirmed by clinical and imaging examination were collected, 13 cases were acute and 17 cases were subacute. All patients underwent MR plain scanning, diffusion weighted imaging (DWI) and SWI scanning before and after treatment. Compare the changes of MRI images before and after treatment. Results In the conventional MRI, 4 cases of intracerebral hemorrhage and 9 cases of SWI were detected by conventional MRI. After the treatment, 5 cases showed hemorrhagic transformation. The relative signal intensity of SWI images of 30 cerebral infarction patients before treatment was 0.97 ± 0.09, and the relative signal intensity after treatment was 1.06 ± 0.12. The relative signal intensity before and after treatment showed significant difference (t = -3.579, P <0.05). Before and after treatment of cerebral infarction within the blood vessels showed significant differences (P <0.05). Conclusion SWI is superior to conventional MRI in displaying hemorrhage after cerebral infarction, hemorrhagic transformation after treatment, and construction of collateral vessels. It has an important clinical value in follow-up after cerebral infarction.