Methods Brain CTA,magnetic resonance angiography(MRA),double carotid chromatic ultrasonic(DCCU) and transcranial Doppler(TCD) examinations were performed in 56 patients with VBI and 26 of these were examined by digital subtraction angiography(DSA).

• 方法对临床确诊VBI患者56例,进行颅脑CTA、颅脑MRA、颈部血管彩超、TCD检查,对26例患者进行DSA检查。