减影CTA和64层VCTDSA对颅内动脉瘤诊断价值的比较

目的:探讨减影CT血管造影（CTangiography,CTA）和64层容积CT数字减影血管造影（VolumeCTdigitalsubtractionangiography,VCTDSA）对颅内动脉瘤的诊断价值的差异。方法:检索1990～2008年国内外公开发表的相关文献,依据标准筛选,获取9篇文献进行研究（英文7篇,中文2篇）,提取相关信息进行对比,分析这两种技术对颅内动脉瘤的诊断敏感性和特异性。结果:所纳入9篇文献中,除Imakita、Romijn等动脉瘤检出的敏感性为92%、99%外,其余均为100%,特异性为90%～100%。从文献的图片中获得脑血管显示及动脉瘤的诊断信息,88.9%图像质量达到优良（8/9）,与其他减影CTA比较,VCTDSA图像质量优,可完整的显示全脑血管,显示5级分支血管,清晰显示动静脉、动脉瘤及与载瘤动脉的关系。结论:与其他减影CTA比较,VCTDSA在颅内动脉瘤的诊断中具有优势。

The evaluation of intracranial aneurysms:comparison with subtraction CT angiography and volume CT digital subtraction angiography

Objective:To evaluate the diagnostic value of subtraction CT angiograph(SCTA)and volume CT Digital subtractionangiography(VCTDSA) in detecting intracranial aneurysms,and compare their performance.Methods:Previously publishedliteratures concerning the diagnostic performance of SCTA between 1990 and 2008 were retrospectively reviewed(seven in English andtwo in Chinese),and were analyzed and compared with the performance of VCTDSA in detecting and characterizing of intracranial aneurysms.Then the correlated information was extracted,and the diagnostic sensitivity and specificity of intracranial aneurysms by the two kinds of technique were analyzed.Results:Except the data of Imakita、Romijn which the sensitivity of detecting intracranial aneurysms were 92% and 99%,the sensitivity of others were 100%,and the specificity of detecting intracranial aneurysms were 90% to 100%.88.9% of images were excellent quality(8/9)in the display of cerebral vessels and diagnostic information of intracranial aneurysms.The image quality of VCTDSA was excellent compared with other subtraction CT angiography,and it could completely display the whole cerebral vessels,including 5 grade branches and the clear relationship among artery-veins,aneurysms and parent artery of aneurysms.Conclusion:Compared with Subtraction CT angiography,VCTDSA has an advantage in the diagnosis of intracranial aneurysms.