ABSTRACT
Objective To evaluate the value of neck blood vessel colored doppler ultrasound (NBVCDU) and magnetic resonance angiography (MRA) to extracranial carotid artery stenosis in patients with transient ischemic attack (TIA).Methods After implementing NBVCDU and MRA examinations at the same time,45 TIA patients with at least one examination showing arteriostenosis in extracranial section were chosen to carry out cerebral digital subtraction angiography( DSA ),then the stenosis rate was calculated by American symptomatic carotid endarterectomy trial (NASCET) method.Results Regarding DSA as the gold standard,for 45 TIA patients that having 180 arteriostenosis in extracranial section, sensitivity,specificity,accuracy of NBVCDU examination was 93.51% ,95.15% ,94.44%, Kappa = 0.735; sensitivity,specificity,accuracy of MRA was 92.21% ,94.17% ,93.33% , Kappa =0.681; sensitivity,specificity,accuracy of NBVCDU combined with MPA was 97.40% ,99.03% ,98.33%, Kappa = 0.872.Conclusions The sensitivity and accuracy of arteriostenosis in extracranial section by NBVCDU examination is higher than that by MRA, and it is suitable in the crowd primary examination.NBVCDU combined with MRA has shown good consistence with DSA for diagnosing arteriostenosis in extracranial section,but can't replace DSA comlpetely.