The comparative study of different vascular imaging for diagnosis of intercranial artery TIA

Objective To observe the clinical manifestation and the carotid artery stenosis of intercranial artery transient ischemic attack(TIA),and discuss the value of transcranial Doppler ultrasound(TCD) and computed tomographic angiography(CTA) in diagnosis of carotid artery stenosis in intercranial artery TIA.Methods DSA was performed in 56 patients with intercranial artery TIA and the clinical and distribution of carotid artery stenosis were analyzed,while TCD was performed in 46 patients and CTA was performed in 54 patients with TIA,then sensitivity,specifity and total consistent rate of TCD and CTA were calculated with Kappa test.Results 7.1% patients have atypical manifestations.Cranial artery stenosis was existed in 76.8% patients.The stenosis artery was vertebral-basiler aretery in 7.1% patients.Moderate-serious stenosis exists in 86.1% cranial artery stenosis.The frequency of stenosis of intracranial artery was higher than that of extracranial artery.According to NASCET crieria for DSA,the sensitivity,specificity,total consistent rate of TCD were 87.1%,75.0% and 80.4%,respectively(Kappa=0.455).While of those CTA were 95.5%,80%,and 92.6%,respectively(Kappa=0.475).Conclusions TCD and especially CTA is useful for diagnosis of cranial artery stenosis.They show good consistency to DSA,but can not displace DSA in some cases.