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目的利用双源CT血管造影技术(DSCTA)观察椎-基底动脉常见病变,探讨双源CT血管成像对椎-基底动脉供血不足(VBI)病因的诊断价值。方法应用双源CT对43例临床拟诊为VBI的患者行椎-基底动脉CTA检查,原始数据于高级后处理工作站MMWP8818进行重建后处理,并利用相关分级法对椎-基底动脉进行评价。结果43例患者86支椎动脉中有6例12支椎动脉显示正常。余37例74支椎动脉中,局限性狭窄27支,其中粥样硬化斑块所致21支,颈椎增生压迫所致6支;迂曲18支;先天变异14例18支;椎动脉瘤1支。部分椎动脉合并两种以上病变。通过DSCTA检查,43例拟诊VBI患者中37例明确了病因(约占86%)。其中16例患者同时与数字减影血管造影(DSA)检查进行对照,对局限性狭窄的显示,CTA的灵敏度为84.6%,特异度为94.7%。结论DSC-TA各种后处理功能联合应用,对显示椎-基底动脉病变有明显优势,可作为VBI的常规影像检查方法。
Objective To evaluate the diagnostic value of dual-source CT angiography in the diagnosis of vertebro-basilar insufficiency (VBI) by dual-source CT angiography (DSCTA). Methods Double-source computed tomography (CT) was performed in 43 clinically diagnosed patients with VBI. The data were reconstructed and processed by the advanced post-treatment workstation MMWP8818. The vertebrobasilar artery was evaluated by the related grading method. Results Of the 43 patients, 6 of the 86 vertebral arteries showed normal in 12 vertebral arteries. In 37 cases of 37 cases of vertebral artery, the limitations of stenosis 27, of which 21 cases caused by atherosclerotic plaque, cervical hyperplasia compression caused by 6; tortuous 18; congenital variation in 14 cases 18; vertebral artery aneurysm . Some vertebral artery with two or more lesions. By DSCTA, 37 of the 43 cases diagnosed with VBI identified the etiology (about 86%). Sixteen of the patients underwent digital subtraction angiography (DSA) at the same time. For limited stenosis, CTA had a sensitivity of 84.6% and a specificity of 94.7%. Conclusion The combined application of various post-treatment functions of DSC-TA has obvious advantages in displaying vertebrobasilar artery lesions and can be used as a routine imaging examination method of VBI.