Comparison of multislice computerized tomography anglography and digital subtraction angiography in the postoperative evaluation of patients with clipped aneurysms

被引:74
|
作者
Dehdashti, AR
Binaghi, S
Uske, A
Regli, L
机构
[1] CHU Vaudois, Dept Neurosurg, CH-1011 Lausanne, Switzerland
[2] CHU Vaudois, Div Neuroradiol, CH-1011 Lausanne, Switzerland
关键词
aneurysm surgery; clip occlusion; computerized tomography angiography; digital subtraction angiography; postoperative evaluation;
D O I
10.3171/jns.2006.104.3.395
中图分类号
R74 [神经病学与精神病学];
学科分类号
摘要
Object. In this study the accuracy of multislice computerized tomography (MSCT) angiography in the postoperative examination Of Clip-occluded intracranial aneurysms was compared with that of intraarterial digital subtraction (DS) angiography Methods. Forty-nine consecutive patients with 60 clipped aneurysms (41 of which had ruptured) were studied with the aid of postoperative MSCT and DS angiography. Both types of radiological studies were reviewed independently by two observers to assess the quality of the images, the artifacts left by the clips, the completeness of aneurysm occlusion, the patency of the parent vessel, and the duration and cost of the examination. The quality of MSCT angiography was good in 42 patients (86%). Poor-quality MSCT angiograms (14%) were a result of the late acquisition of images in three patients and the presence of clip or motion artifacts in four. Occlusion of the aneurysm on good-quality MSCT angiograms was confirmed in all but two patients in whom a small (2-mm) remnant was confirmed on DS angiograms. In one patient, occlusion of a parent vessel was seen on DS angiograms but missed oil MSCT angiograms. The sensitivity and specificity for detecting neck remnants oil MSCT angiography were both 100%, and the sensitivity and specificity for evaluating vessel patency were 80 and 100%, respectively (95% confidence interval 29.2-100%). Interobserver agreements were 0.765 and 0.86, respectively. The mean duration of the examination was 13 minutes for MSCT angiography and 75 minutes for DS angiography (p < 0.05). Multislice CT angiography was highly cost effective (p < 0.01). Conclusions. Current-generation MSCT angiography is an accurate noninvasive tool used for assessment of clipped aneurysms in the interior circulation. Its high sensitivity and low cost warrant its use for postoperative routine control examinations following clip placement oil an aneurysm. Digital subtraction angiography must be performed if the interpretation of MSCT angiograms is doubtful or if the aneurysm is located in the posterior circulation.
引用
收藏
页码:395 / 403
页数:9
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