磁敏感加权成像对静脉性脑梗死的评估价值研究

Study on the value of susceptibility-weighted imaging in the venous cerebral infarction

目的通过比较磁敏感加权成像(susceptibility weighted imaging,SWI)与常规MRI序列对静脉性脑梗死(VCI)的评估,探讨SWI在评估VCI中的临床应用价值。方法回顾性分析28例临床确诊为VCI患者的影像资料,所有患者均行常规MR及SWI检查,比较两者的病变鉴别能力及病灶内的细节显示。结果 SWI诊断24例(24/28)VCI,其中18例(18/24)为出血性静脉脑梗死;常规MR诊断出18例(18/28)VCI,其中15例为出血性静脉脑梗死(15/18)。另外16例(16/24)SWI最小密度投影(Min IP)图像上梗死区域可见扩张的小静脉,而常规MR图像上无法辨别;有11例(11/15)SWI显示梗死区内出血灶的数目或出血量较常规MR增多。结论 SWI较常规MR序列能更敏感的显示VCI,对VCI的判断及病情演变更加准确。

Objective By comparing the results between susceptibility weighted imaging（SWI） and conventional MRI sequences on the evaluation of venous cerebral infarction（VCI）,to explore the diagnostic value of SWI in this disorder. Methods The image data of 28 patients with VCI diagnosed clinically were retrospectively analyzed. All patients were performed routine MR and SWI examination. The identified ability and the displayed details within the lesion by two modalities were compared. Results24 patients were diagnosed by SWI,in whom 18 were hemorrhagic VCI. While,18 were diagnosed by conventional MR,in whom15 were hemorrhagic VCI. In addition,the dilated venule in the image of infarct area was demonstrated in minimum density projection（Min IP） of SWI,but,unable to discern by the conventional MR images. In 11 cases,SWI showed that the number of the infarction area hemorrhagic focus or amount of the bleeding were much than those by routine MR. Conclusion SWI is more sensitive than conventional MR sequences in displaying VCI,which is more helpful for the judgment of the development of VCI.