Value of cranial CT angiography combined with magnetic resonance angiography in prediction of transient ischemic stroke

Objective To observe value of cranial CT angiography(CTA)and magnetic resonance angiography(MRA), as well as their combination in prediction of risk of stroke after cerebral ischemia. Methods A total of 101 patients with transient cerebral ischemia who admitted in the hospital were included. Cranial CTA and MRA examinations were performed for all patients on admission to observe the intracranial arterial stenosis conditions. The receiver operating characteristic curve(ROC)was drawn to obtain the area under the curve(AUC). The values of each imaging method alone and in combination in predicting transient ischemic stroke were examined. Results Out of 101 patients, there were 15 cases with ischemic stroke diagnosed as transient ischemic stroke within 1 week of hospitalization. The results of CTA and MRA showed that the degree of carotid artery stenosis and the rate of carotid artery stenosis within 7 d of hospitalization in patients with transient cerebral ischemia were higher than those without, and the difference was statistically significant(P<0.05). The incidence of stroke in patients with stenosis diagnosed by CTA or MRA alone and in combination was higher than that those without stenosis detected, and the difference was statistically significant(P<0.05). The ROC curve results showed that AUC of CTA and MRA alone and in combination in predicting the incidence of transient ischemic stroke was 0.875, 0.897, and 0.900, respectively, and the AUC value of combined prediction was higher than single prediction. Conclusion On admission, CTA and MRA detection of arterial stenosis can be used to predict the risk of ischemic stroke, and combined examination has higher predictive value.-