Abstract: ［Abstract］ Objective〖HTSS〗To investigate differences in the application value of CT angiography(CTA) and cervical vascular color Doppler ultrasound in diagnosis of extracranial lesions of carotid artery in patients with acute cerebral infarction(ACI).
Methods〖HTSS〗A retrospective analysis was performed on examination data from 100 ACI patients. All patients underwent CTA, cervical vascular color Doppler ultrasound and digital subtraction angiography(DSA). The detection conditions for extracranial vascular stenosis degree of carotid artery and plaquesby CTA and cervical vascular color Doppler ultrasound were compared. Taking DSA results as golden standard,diagnostic value of the two methods for extracranial vascular stenosis degree of carotid artery was judged.
Results〖HTSS〗The detection conditions for extracranial vascular stenosis degree of carotid artery(mild, moderate, severe, and embolization) by CTA was much better than those by cervical vascular color Doppler ultrasound. And there were significant differences only in mild and moderate stenosis(P＜0.05). The detection rate of CTA for different types plaques in internal carotid artery was better than that of cervical vascular color Doppler ultrasound(P＜0.05). There was no significant difference in detection of different types plaques between common carotid artery and external carotid artery(P＞0.05). Taking DSA results as golden standard, sensitivity, specificity, accuracy, positive predictive value and negative predictive value of CTA for diagnosis of extracranial vascular stenosis degree of carotid artery were higher than those of cervical vascular color Doppler ultrasound.There were only significant differences in sensitivity, accuracy and negative predictive value between two methods(P＜0.05).
Conclusion〖HTSS〗The diagnostic efficiency of CTA is superior to that of cervical vascular color Doppler ultrasound in diagnosis of extracranial lesions of carotid artery in ACI patients.Especially,the advantages are more obvious in terms of the diagnosis of vascular stenosis degree and plaque type of internal carotid artery.

Key words: brain infarction, extracranial lesion of carotid artery, CT angiography, ultrasonography