| 赵霞,王现亮,孟凡莲,李达,朱融,于秀荣,赵文静.MRI评价正常人视交叉及其前间隙的解剖结构[J].中国医学影像技术,2015,31(4):503~507 |
| MRI评价正常人视交叉及其前间隙的解剖结构 |
| MRI evaluation of anatomical structure of optic chiasm and optic chiasm interspaces in normal human |
| 投稿时间：2014-11-11 修订日期：2015-02-17 |
| DOI：10.13929/j.1003-3289.2015.04.005 |
| 中文关键词: 视交叉 视神经 磁共振成像 |
| 英文关键词:Optic chiasm Optic nerve Magnetic resonance imaging |
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| 中文摘要: |
| 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,P >0.05);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。 |
| 英文摘要: |
| Objective To study the three-dimensional morphological characteristics of optic chiasm and optic chiasm interspaces on the MR images in normal human, and to obtain related parameters. Methods Totally 160 volunteers underwent optic chiasm MR scanned with T1W MP-RAGE and T2W TSE sequence. The length of the intracranial optic nerve, the radial line, angles of the optic chiasm, as well as the angle between the optic chiasm and pituitary were measured on MPR images. The differences between genders, among different ages, between left and right intracranial optic nerves were all compared. Results In 160 adults, the length of the intracranial optic nerves were (18.23±3.12)mm for left and (17.27±3.31)mm for right (t=0.27, P >0.05); the prechiasmatic interspace was triangular on the whole and its area was (44.04±7.73)mm2; the anteroposterior and transverse diameter of optic chiasm on axial view were (8.81±1.14)mm and (13.78±1.22)mm; the thickness of optic chiasm was (3.73±0.41)mm; the anterior and posterior horn of optic chiasm were(70.72±7.38)° and (76.74±8.49)°; the lateral horn were (123.03±9.42)° for left and (124.18±10.31)° for right; the angle between the optic chiasm and pituitary was (46.54±10.29)°. The parameters between male and female had no statistical difference (P >0.05). The results of the length of bilateral intracranial optic nerves, the anteroposterior diameter, the transverse diameter and the thickness of optic chiasm in different ages had significant differences (all P<0.05); the angle of optic chiasm, the angle between the optic chiasm and the area of the prechiasmatic interspace had no significant differences (all P >0.05). Conclusion The three-dimensional morphological characteristics of optic chiasm interspaces and its adjacent anatomical structures can be well shown on MR images, and establishing reference values of parameters is helpful for clinical diagnosis and neurosurgery. |
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