CTA、DSA在颅内动脉瘤诊治中价值的对比研究

目的探讨CT血管造影(CTA)和数字减影血管造影(DSA)诊治颅内动脉瘤的价值。方法对56例颅内动脉瘤患者行CTA检查,分析动脉瘤显示情况,并将结果与DSA和/或手术所见比较。部分动脉瘤病例术后行CTA和DSA复查。结果 DSA确诊56例动脉瘤患者,发现68个动脉瘤。CTA显示51例(63个)动脉瘤,敏感性为91.07%(51/56),特异性为100%。CTA能明确动脉瘤的部位、大小、瘤颈及瘤体与载瘤动脉的空间关系,但不能很好地反映动脉瘤夹闭情况。结论 DSA目前仍然是临床诊断颅内动脉瘤及术后随访检查的"金标准"。CTA对于临床疑诊为颅内动脉瘤患者可作为一种筛选方法,但不适合动脉瘤术后的复查。

Comparison of values to diagnosis and treatment of intracranial aneurysm between CT angiography and digital subtraction angiography

Objective To evaluate the role of CT angiography（CTA）and digital subtraction angiography（DSA）in the diagnosis and treatment of intracranial aneurysms.Methods Fifty-six patients with intracranial aneurysms were examined by CTA and DSA.Three-dimensional reconstruction of the CTA images was performed by maximum intensity projection and volume rendering with all the patients.The CTA data of intracranial aneurysms were analyzed and compared with DSA data and/or the status observed by the operation.CTA and DSA examinations were reperformed after the surgery for clipping the intracranial aneurysms in some patients.Results Sixty-eight aneurysms were founded with DSA in 56 patients before the surgery.The sensitivity and specificity of the intracranial aneurysms to CTA,which showed 63 aneurysms in 51 of 56 patients,were 91.07%and 1 00%respectively.The size,location,aneurysmal neck and the relationship between aneurysmal bodies and parent arteries were clearly showed by CTA.The clipped aneurysm could not be clearly showed by CTA.Conclusions DSA still is the gold standard of diagnosing intracranial aneurysm at the present.CTA which is a of great value to diagnosing and treating intracranial aneurysm may be used to screen out patient with suspectable intracranial aneurysm,and is not proper for the reexamination after the surgery and during the following up in the patients with clipped aneurysms.