MRI评价正常人视交叉及其前间隙的解剖结构

发布时间：2018-07-31 09:18

【摘要】：目的通过MRI研究活体视交叉及其前间隙的立体形态,并测量相关参数。方法对160名健康志愿者行视交叉区T1W MP-RAGE、T2W TSE序列扫描;采用MPR技术测量视神经颅内段、视交叉各径线长度、各角度、视神经与垂体柄夹角。比较男女、视神经颅内段左右侧之间及各年龄段间的差异。结果视神经颅内段长度左侧为(18.23±3.12)mm,右侧为(17.27±3.31)mm(t=0.27,P0.05);视交叉前间隙大致呈三角形,面积为(44.04±7.73)mm2;视交叉轴位前后径为(8.81±1.14)mm,横径为(13.78±1.22)mm,厚度为(3.73±0.41)mm,前、后角度数分别为(70.72±7.38)°、(76.74±8.49)°,左、右侧角度数分别为(123.03±9.42)°、(124.18±10.31)°;视交叉与垂体柄的夹角为(46.54±10.29)°。男女间测量结果差异无统计学意义(P均0.05)。各年龄段左右视神经颅内段、视交叉前后径、横径及厚度差异有统计学意义(P均0.05);视交叉各角、视交叉与垂体柄夹角、视交叉前间隙面积间差异无统计学意义(P均0.05)。结论 MR成像及其后处理技术可清晰显示视交叉及其前间隙的立体形态,建立正常人群相关参数的标准参考值,可为临床诊断及手术提供基本影像学依据。
[Abstract]:Objective to study the stereoscopic morphology of the optic chiasma and its anterior space by MRI and to measure the relevant parameters. Methods T1W MP-RAGEG T2W TSE sequence was performed in 160 healthy volunteers, and MPR technique was used to measure the intracranial segment of optic nerve, the length and angle of optic nerve and the angle between optic nerve and pituitary stalk. To compare the difference between male and female, between the left and right sides of the optic nerve and between the different age groups. Results the length of the optic nerve was (18.23 卤3.12) mm on the left and (17.27 卤3.31) mm (/ t) on the right, the anterior and posterior space of the optic chiasma was (44.04 卤7.73) mm, the anterior and posterior angles were (70.72 卤7.38) 掳, (76.74 卤8.49) 掳, (8.81 卤1.14) mm, (13.78 卤1.22) mm, (3.73 卤0.41) mm, (70.72 卤7.38) 掳, (76.74 卤8.49) 掳, respectively. The right angle was (123.03 卤9.42) 掳, (124.18 卤10.31) 掳, the angle between optic chiasma and pituitary stalk was (46.54 卤10.29) 掳. There was no significant difference between men and women (P 0.05). There were significant differences in the anterior and posterior diameters, transverse diameters and thickness of optic chiasma in all ages (P 0.05), but there was no significant difference in the angle of optic chiasma, the angle between optic chiasma and pituitary stalk, and the area of anterior space between optic chiasma (P 0.05). Conclusion Mr imaging and post-processing techniques can clearly display the stereomorphology of the optic chiasma and its anterior space, and establish the standard reference value of the related parameters of normal population, which can provide the basic imaging basis for clinical diagnosis and surgery.
【作者单位】：潍坊医学院医学影像学系;潍坊市人民医院放射科;
【分类号】：R445.2;R322.9

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