双能量CTA在急性脑血肿扩大的预测价值

目的:探索双能量CTA在预测脑血肿早期扩大的应用价值.方法:收集167例急性脑出血患者的临床及影像资料,其中血肿扩大组57例,血肿无扩大组110例.采用条件向前法将两组间差异有统计学意义的临床指标及影像特征纳入logistic回归分析,计算受试者工作特征(ROC)曲线下面积来评估这些变量预测血肿扩大的效能.结果:血肿扩...

Intracranial hypenintense vessel sign is associated with cerebral ischemic events in patients with severe in- ternal carotid or middle cerebral artery lesions

Objective:To explore the application value of dual-energy CTA in predicting hematoma growth.Methods Clinical and imaging data of 167 patients were collected,including 57 patients in the hematoma growth group and 110 patients in the group without hematoma growth.The clinical and imaging data that differed between the two groups were enrolled in the logistic regression analysis using the Conditional Forward Stepwise,and the area under the ROC curve was calculated to compare their advantages in predicting hematoma enlargement.Results The time from onset to CT scan,initial blood volume,"blend sign","spot sign"in dual-energy and"spot sign"in conventional CT in the hematoma growth group were(3.25±1.20)hours,(33.83±12.55)ml,25 cases,36 cases and 32 cases,respectively,and(3.94±1.38)hours,(23.19±12.88)ml,13 cases,6 cases and 13 cases in the group without hematoma growth.They were significantly different between the two groups.The sensitivity of"blend sign",dual-energy"spot sign"and conventional"spot sign"in predicting hematoma enlargement were 43.9%,63.2%,56.1%,and the specificity was 88.2%,94.5%,88.2%,respectively.The area under the characteristic curve was 0.66,0.79 and 0.72,respectively.Final the initial bleeding volume(OR:1.07),time from onset to CT scan(OR:0.63),and"point sign"in dual-energy(OR:33.42)were entered into the Logistics Regression Analysis,and the area under the ROC curve for combined parameters to predict hematoma growth was 0.89.Conclusion Dual-energy CTA has higher value in predicting intracranial hematoma enlargement than conventional CTA scans,and the combination of clinical and imaging findings can further improve the predictive accuracy.