摘要
Abstract
Objective Digital subtraction angiography (DSA) is the gold criterion for the diagnosis of carotid artery stenosis,the purpose of this study is to assess the diagnostic value of the multilayer spire CT angiography (CTA) for carotid artery stenosis and its coincidence with DSA.Methods Totally 42 patients who were clinically suspected of having carotid artery stenosis (CAS) were examined by CTA and DSA,for CTA post treatment,volume rendering and maximum intensity projection technology was adopted.The degree of vascular stenosis was analyzed.Results The detection rate of grade Ⅰ carotid stenoses by CTA was significantly different from that by DSA (χ2=4.71,P＜0.05),but those of grade Ⅱ-Ⅳ carotid stenoses were not (P＞0.05).In the diagnosis of grade Ⅰ carotid stenosis by CTA the sensitivity (Se) was 69.2%,specificity (Sp) was 95.3%,total consistent rate (π) was 85.5%,misdiagnostic rate (α) was 4.7%,and omission diagnostic rate (β) was 30.1%.In the diagnosis of grade Ⅱ carotid stenoses by CTA,the Se was 82.1%,Sp was 97.6%,π was 91.3%,α was 2.4%,and β was 17.9%.In the diagnosis of grade Ⅲ-Ⅳ carotid stenoses by CTA,Se was 93.3%,Sp was 98.1%,π was 97.1%,α was 1.9%,and β was 6.7%.Conclusion CTA has higher sensitivity and Specificity for examination of carotid artery,it agrees well with DSA.It is an effective,safe and noninvasive examinational means,worth popularizing and applying in clinic.关键词
体层摄影术/螺旋计算机/脑梗死/颈动脉狭窄/血管造影术/数字减影Key words
Tomography,spiral computed/Brain infarction/Carotid stenosis/Angiography,digital subtraction分类
医药卫生
