While by method B only 29 aneurysms were detected,1 anterior cerebral artery anerrysm,2 anterior communication and artery carotis interna anerrysms were not displayed.

• 法检出动脉瘤31个,漏检1个大脑前动脉瘤2、个前交通动脉瘤、2个颈内动脉瘤。