磁敏感加权成像在检测急性脑缺血出血性转化中的应用价值

目的 评价磁敏感加权成像在检测急性脑缺血出血性转化中的应用价值。方法 采用GE 3．0T MRI对36例经溶栓治疗的急性缺血性脑卒中患者行磁敏感加权成像（susceptilityweighted imaging，SWI）序列及常规T1增强序列，并于一周内复查常规MRT1序列。比较SWI及T1强化异常范围与复查MR出血范围的一致性。结果 发生出血性转化的5例患者SWI及常规T1增强序列均有异常表现，1例患者T1增强存在异常强化区，复查MR未示明确出血灶。比较SWI异常区面积、常规T1增强异常区面积及复查常规MRT1出血面积，发现SWI异常区面积与复查常规MRT1出血面积符合率较高。结论 磁敏感加权成像检测急性缺血性脑卒中患者出血性转化的价值优于常规T1增强扫描。

Applicable value of susceptility-weighted imaging in the detection of intracerebral hemorrhage after acute ischemic stroking

Objective To investigate the value of susceptility-weighted imaging in the detection of intracerebral hemorrhage after acute ischemic stroking. Methods SWI sequence and T1-weighted sequence were performed in 36 cases with intracerebral hemorrhage using GE 3.0 T MRI .And MR T1 sequence was performed within one week. Abnormal area on SWI and T1-weighted and bleeding area on MR were compared. Results 5 patients who had intracerebral hemorrhage after thrombolysis therapy had abnormal signal on SWI and T1-weighted imaging while 1 patients with no intracerebral hemorrhage had abnormal signal on T1-enhanced imaging. Abnormal signal area on SWI was in accordance with bleeding area on the second MR T1 imaging. Conclusion Susceptility-weighted imaging is better than T1-enhanced imaging in the detection of intracerebral hemorrhage after thrombolytic therapy.