SWI联合3 D-PCASL对急性脑梗死预后评估的研究

目的：探讨磁敏感加权成像(SWI)联合三维准连续式动脉自旋标记(3D-PCASL)技术对急性脑梗死预后评估的临床应用价值。方法30例急性脑梗死患者(<72 h)均行常规MRI、磁共振血管成像(MRA)、3D-PCASL及SWI检查,并在检查当日、3个月时进行临床脑卒中分级表(NIHSS)评分。将SWI和3D-PCASL对急性脑梗死侧支血管显示程度、局部脑血流量(rCBF)与临床预后进行相关性分析。结果23例病灶内出现迂曲血管影,其中1级14例、2级9例。0、1、2级梗死区平均rCBF值分别为(22.69±11.94)mL·100 g-1·min-1、(25.10±16.55)mL·100 g-1·min-1、(33.04±24.24)mL·100 g-1·min-1。侧支血管的显示程度、rCBF与 NIHSS评分呈正相关(r=0.989,P<0.01)。18例病灶周围出现多发血管影,有、无侧支血管的梗死区平均rCBF值分别为(28.33±24.24)mL·100 g-1·min-1和(22.69±11.94)mL·100 g-1·min-1,侧支血管的显示程度、rCBF与 NIHSS评分呈正相关(r=0.897,P<0.01)。30例患者,梗死区和对侧镜像区的平均rCBF值分别为(26.92±18.22)mL·100 g-1·min-1和(34.22±12.37)mL·100 g-1·min-1,两者有显著性差异(t=8.093,P<0.01)。结论 SWI和3D-PCASL联合应用可提供急性脑梗死病灶内及周围软脑膜侧支血管、rCBF变化情况,对临床制订正确的治疗方案和预后判断具有重要临床意义。

The study of SWI combined with 3D-PCASL on the prognosis analysis of acute cerebral infarction

Objective To investigate the clinical value of susceptibility weighted imaging (SWI)combined with three dimensional pseudo continuous arterial spin labeling (3D-PCASL)on the prognosis analysis of acute cerebral infarction.Methods Thirty cases with acute cerebral infarction (< 72 h)underwent conventional MRI,MRA,3D-PCASL and SWI.NIHSS scores were performed at the time of examination and 3 months later.The correlation between the collateral blood vessels,regional cerebral blood flow (rCBF)detected by combination of SWI and 3D-PCASL with clinical prognosis were analyzed.Results Twenty-three cases showed collateral blood vessels in the lesions with 1 grade in 14,and 2 grade in 9.The average rCBFs in grade 0,1,2 infarction areas were (22.69±11.94)mL·100 g-1 ·min-1 ,(25.10±16.55)mL·100 g-1 ·min-1 and (33.04±24.24)mL·100 g-1 ·min-1 ,respectively.Collateral blood vessels,rCBF were positive correlated with the NIHSS scores (r=0.989,P< 0.01).18 cases showed multiple vessels around the lesions. The average rCBFs in the infarction area with or not with periphery collateral blood vessles were (28.33±24.24)mL·100 g-1 ·min-1 and (22.69±11.94)mL·100 g-1 ·min-1 ,respectively.There was a positive correlation between rCBF and NIHSS scores (r=0.897,P<0.01). Of 30 cases of acute cerebral infarction,the average CBFs in the infarct areas and the contralateral mirror areas were (26.92±18.22)mL·100 g-1 · min-1 and (34.22±12.37)mL·100 g-1 ·min-1 .There was significant difference (t=8.093,P<0.01).Conclusion The combination of SWI and 3D-PCASL can display the collateral blood vessels in the lesions and soft meninges,and provide the quantitative analysis of rCBF,which has important clinical significance for prediction of the prognosis of acute cerebral infarction.