Application of 16 Slices CT Angiography in the Diagnosis and Postoperative Evaluation of Intracranial Aneurysms

Objective To assess the values of 16 slices CT angiography (CTA) in the diagnosis and postoperative follow-up of intracranial aneurysms after clip.Materials and Methods 23 patients were admitted under clinical symptoms and signs suggestive of harboring intracranial aneurysms. All these patients were underwent CTA and DSA examinations. DSA was used as gold standard. 6 patients who had been treated with clip were underwent both preoperative and postoperative CTA to evaluate aneurysm clipping.Results According to DSA results and surgical findings, the sensitivity, specificity, and the accuracy of 16 slices CTA for the detection of all aneurysms were 81.5%, 100%, and 84.4% respectively. Postoperative CTA displayed a remnant of the aneurysm body in one case, and all the parent artery and other major artery are patency.Conclusion 16 Slices CTA has satisfying sensitivity and specificity, but CTA has limitation in internal carotid artery and vertebral artery. After aneurysm clipping, CTA can evaluate clip position, the patency of the parent vessel and other major vessel, but the value of evaluating the presence of remnant of aneurysm body and neck need further research.