Objective To evaluate the diagnostic value of 64 multidetector-row CT head and neck angiography for intracranial aneurysm.Methods 176 intracranial aneurysm patients were recruited,and evaluated for size,shape,position of the aneurysms by64 multidetector-row CT head and neck angiography.Results 176 patients were examined by DSA,including 157 post-operative patients.201 aneurysms were detected,including 19 multiple aneurysms.Of the total,171 patients were first identified( 196 aneurysms),5 patients missed diagnosis,and the rate of positive diagnosis was 97.5%( 196/201).Of the 171 patients,112 had internal carotid aneurysms,10 had posterior communicating aneurysms,26 anterior communicating aneurysms,5 basilar artery aneurysm,13middle cerebral artery aneurysm,5 anterior cerebral artery aneurysms.Another 2 patients with aneurysms were identified after re-examination.Conclusions The application and rational post-processing of 64 multidetector-row CT head and neck angiography were of significant importance for preoperative postoperative evaluation of intracranial aneurysms.