Methods:Vascular model of the skull base was observed using 16-slice spiral CT(Brightspeed elite). (1)Each parameter was scanned for 10 times at both spiral and non-spiral axial view.

• 方法:用颅底骨血管模型,16层螺旋CT(Brightspeed elite)扫描:1)轴位螺旋和非螺旋同一参数重复10次扫描;