双源CT自动去骨及钙化斑块技术评价颈动脉狭窄  

Dual-energy CT automatic bone and calcified plaque removal for evaluation of carotid stenosis

作　　者：吕鹏[1] 林江[1] 张维升[1] 王莉莉[1] 侯凯[1] 

机构地区：[1]复旦大学附属中山医院放射诊断科上海市影像医学研究所,上海200032

出　　处：《中国医学影像技术》2014年第11期1721-1724,共4页Chinese Journal of Medical Imaging Technology

摘　　要：目的评价颈动脉双源CTA中CT自动去骨去钙化斑块技术评价颈动脉狭窄的价值。方法纳入接受颈动脉双源CTA的疑似颈动脉狭窄患者43例,采用标准MIP及自动去骨去钙化斑块MIP技术重建图像,评估两种重建方法评价颈动脉狭窄与DSA结果的相关性,以DSA结果为金标准计算两种重建方法评估颈动脉狭窄程度的敏感度和特异度。结果 DSA和CTA均发现53处颈动脉杈狭窄。去骨去钙化斑块MIP重建图像评价颈动脉狭窄程度与DSA间相关性(r2=0.96)高于标准MIP重建图像与DSA间相关性(r2=0.83)。去骨去钙化斑块和标准MIP重建图像诊断颈动脉闭塞敏感度均为100%(6/6),特异度为100%(47/47)和89.36%(42/47),诊断重度颈动脉狭窄敏感度为100%(15/15)和73.33%(11/15),特异度为94.74%(36/38)和89.47%(34/38),诊断轻、中度颈动脉狭窄敏感度为90.63%(29/32)和81.25%(26/32),特异度为100%(21/21)和95.24%(20/21)。结论颈动脉双源CTA中,采用去骨去钙化斑块技术可提高评价颈动脉狭窄程度准确性,具有良好的应用前景。Objective To evaluate the value of dual-source CT automatic bone and calcified plaque removal in carotid CTA for detecting carotid stenosis.Methods Forty three patients with suspected carotid stenosis underwent carotid dual-source CTA with standard and bone and calcified plaque removed MIP reconstruction technique.The correlation between the two reconstrution methods and DSA were analyzed.Taken DSA results as gold standard,the sensitivity and specificity of the two reconstrution methods for assessing the stenosis grade were calculated.Results Totally 53 stenoses were observed in both CTA and DSA.Correlation between automatic bone and calcified plaque removed MIP and DSA（r^2=0.96）was higher than that between standard MIP and DSA（r^2=0.83）.The sensitivity and specificity of automatic bone and calcified plaque removed MIP,standard MIP in assessing the stenosis grade was 100%（6/6）and 100%（47/47）,100%（6/6）and89.36%（42/47）for carotid artery occlusion;100%（15/15）and 94.74%（36/38）,73.33%（11/15）and 89.47%（34/38）for serious carotid stenosis;90.63%（29/32）and 100%（21/21）,81.25%（26/32）and 95.24%（20/21）for mildmoderate carotid stenosis.Conclusion In carotid dual-energy CTA,automatic bone and calcified plaque removal can improve the accuracy for assessing the grade of carotid artery stenosis,which has great application prospect.

关 键 词：体层摄影术 X线计算机 颈动脉狭窄 血管造影术 数字减影 

分 类 号：R814.42[医药卫生—影像医学与核医学]