【摘要】 目的:通过对视神经管与特定标志点的距离和特定标志面的夹角的测量,为视神经管的定位提供依据。方法:对120名志愿者的双侧视神经管进行CT扫描,以正中矢状面上骨性鼻尖(P1)和前床突中点(P2)连线(L1)为基线,以过该线且与正中矢状面垂直的平面作为测量平面,分别测量视神经管内侧壁长度(D1),骨性鼻尖到视神经管眶口(P3)和颅口(P4)的距离(D2,D3),视神经管眶口和颅口距正中矢状面的距离(D4,D5),P1P3和P1P4与正中矢状面的夹角(A1,A2)。结果:120例国人的D1左侧为(10.51±1.07)mm,右侧为(10.64±1.10)mm,两者比较差异有统计学意义(P<0.05);D2左侧为(66.68±5.99)mm,右侧为(66.81±5.97)mm,两者比较差异无统计学意义(P>0.05);D3左侧为(72.82±6.33)mm,右侧为(73.04±6.33)mm,两者比较差异有统计学意义(P<0.05);D4左侧为(13.96±1.43)mm,右侧为(14.16±1.53)mm,两者比较差异无统计学意义(P>0.05);D5左侧为(6.65±1.25)mm,右侧为(6.58±1.41)mm,两者比较差异无统计学意义(P>0.05)。A1和A2分别为(12.26±1.63)°和(5.28±1.13)°。结论:以上参数的测定可以在测量平面上对视神经管进行准确定位,为实施视神经管减压术提供了参考,使经鼻入路视神经管减压术更加安全。更多还原

【Abstract】 Objective To locate the optic canal precisely by measuring related distances and angles between optic canal and certain landmarks.Methods 120 CT images from clinical database were chosen for measurement.The line(L1) of the nasal bone tip(P1) and the middle point of tuberculum sellae(P2) in centre sagittal plane were set as a baseline.The plane went through L1 and perpendicular to centre sagittal plane(L2) was set as measurement plane.The parameters were the medial canal wall length(D1),the distance between nasal bone tip(P1) and orbit end of optic canal(P3)(D2),the distance between P1 and cranium end of optic canal(P4)(D3),the distance between P3 and L2(D4),the distance between P4 and L2(D5),the angle between P1P3 and L2(A1),and the angle between P1P4 and L2(A2).Results D1 was(10.51±1.07) mm on the left,(10.64±1.10) mm on the right,statistical difference was found between the two sides(P<0.05).D2 was(66.68±5.99) mm on the left,(66.81±5.97) mm on the right,there was no statistical difference between the two sides(P>0.05).D3 was(72.82±6.33) mm on the left,(73.04±6.33)mm on the right,statistical difference was found between the two sides(P<0.05).D4 was(13.96±1.43) mm on the left,(14.16±1.53) mm on the right,there was no statistical difference between the two sides(P>0.05).D5 was(6.65±1.25) mm on the left,(6.58±1.41) mm on the right,there was no statistical difference between the two sides(P>0.05).A1 was(12.26±1.63)°,and A2 was(5.28±1.13)°.Conclusion The parameters above can help to locate the optic canal precisely in the measurement plane and provide reference for the decompression surgery.It also makes the surgery safer.更多还原