Among 20 aneurysms, conventional DSA examination could not clarify shape and size of 3(3/20) aneurysms, and the vascular branch including the aneurysmal neck could not be clarified in 7 (7/20) aneurysms .

• 2 0个动脉瘤常规 DSA检查 :3个 (3 /2 0 )动脉瘤的形状、大小显示不清 ,7个 (7/2 0 )动脉瘤的瘤颈以及与载瘤动脉、周围血管的关系显示不清。