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• Clinical Article •
The morphological characteristics of prechiasmatic interspace in normal people with MR imaging
ZHAO Xia  MENG Fan-lian  WANG Xian-liang  LI Da  ZHU Rong  YU Xiu-rong  ZHAO Wen-jing 

DOI:10.3969/j.issn.1674-8034.2015.05.005.


[Abstract] Objectives: To study and measure the prechiasmatic interspaces on the images in human beings, in order to provide imaging evidence for sellar region neurosurgery operation and basic research for neuroantomy.Materials and Methods: Totally 165 volunteers (87 males and 78 females, age 18 to 80 years, mean 44.6 years), who were divided into three groups by age, young(18—40 years), 60, middle-age (41—60 years), 60 and elderly age group (61—80 years), 45 underwent optic chiasm MR scan with T1 weighted MP-RAGE and T2 weighted TSE sequence. The reconstructed images of axial section parallel with optic nerve were obtained with MPR analysis software on midsagittal images. The length of the intracranial optic nerves and anterior horn of optic chiasma were measured, the area of prechiasmatic interspace was calculated as well. The difference between genders, ages and the left and right intracranial optic nerves were compared.Results: In our studies, mean values of the length of intracranial optic nerves were (18.3±3.3) mm, (18.2±3.1) mm for left and (17.3±3.3) mm for right, (17.6±3.1) mm, (18.3±3.0) mm, (17.3±3.2) mm in young, middle-age and elderly age group. the prechiasmatic interspace was triangular shape for163, trapezoid shape for 2 and its area was (44.7±7.7) mm2,(47.1±6.5) mm2, (45.6±6.9) mm2, (43.7±7.0) mm2 in young, middle-age and elderly age group. the anterior horn of optic chiasm was (72.7±7.4) degree, (69.5±7.9)°, (72.5±7.8)°, (72.3±8.0)° in young, middle-age and elderly age group. All the results did not show significant differences between male and female (P>0.05). The length of both intracranial optic nerves had statistical significance difference between age groups (P<0.05). There were no statistically significant difference of the anterior horn of optic chiasm and the area of prechiasmatic interspace between age groups (P>0.05). There were no statistically significant difference of intracranial optic nerves length between left and right (P>0.05).Conclusions: The characteristics of the prechiasmatic interspaces and its adjacent anatomical structures can be well shown on MR images and measure and establish reference values of parameters for clinical diagnosis and neurosurgery.
[Keywords] Prechiasmatic interspaces；Optic chiasm；Optic nerve；Magnetic resonance imaging

ZHAO Xia Department of Medical Imaging of Wei fang Medical College, Weifang, Shandong Province 261000, China

MENG Fan-lian Department of Radiology, Wei fang People Hospital, Weifang, Shandong Province 261041, China

WANG Xian-liang* Department of Radiology, Wei fang People Hospital, Weifang, Shandong Province 261041, China

LI Da Department of Medical Imaging of Wei fang Medical College, Weifang, Shandong Province 261000, China

ZHU Rong Department of Medical Imaging of Wei fang Medical College, Weifang, Shandong Province 261000, China

YU Xiu-rong Department of Radiology, Wei fang People Hospital, Weifang, Shandong Province 261041, China

ZHAO Wen-jing Department of Radiology, Wei fang People Hospital, Weifang, Shandong Province 261041, China

*Correspondence to: Wang XL, E-mail: wangxianliang2011@126.com

Conflicts of interest   None.

Received  2014-11-09
Accepted  2015-03-18
DOI: 10.3969/j.issn.1674-8034.2015.05.005
DOI:10.3969/j.issn.1674-8034.2015.05.005.

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