Abstract：
OBJECTIVE: Awareness of normative values of extra orbital structures would provide useful information to interpret the radiological images better and use them for diagnostic purposes. This study aimed to reveal the average values of major extraocular structures measured on magnetic resonance images.
METHODS: In this retrospective cross-sectional study, magnetic resonance (MR) images of 256 orbits of 128 patients were re-interpreted regarding the measurements of major orbital structures. Extraocular muscles, superior ophthalmic vein, and optic nerve-sheath complex were measured on orbital MR images of these patients. The data distributions were presented by box-plot analyses for each parameter, and the measurement results were analyzed regarding gender and age groups.
RESULTS: Lateral rectus muscle thickness (LR), inferior rectus muscle thickness (IR), globe position (GP), and interzygomatic line (IZL) values were higher in the male group than in the female group (p values were < 0.001, 0.003, 0.020, and < 0.001 respectively). LR, the thickness of the superior group muscles (SUP GR), IR, superior oblique muscle thickness (SOBL), and the thickness of optic nerve-sheath complex (ON) values indicated a significant relationship between age groups. There was a significant, positive, and low-level correlation between age and LR, SUP GR, and IR values (p values were < 0.001, 0.001, and < 0.001, respectively).
CONCLUSIONS: This study provides quantitative data on normative values of orbital structures with gender and age group comparisons. Clinicians or surgeons can easily use the measured values to gather diagnostic information from the orbital region.
METHODS: In this retrospective cross-sectional study, magnetic resonance (MR) images of 256 orbits of 128 patients were re-interpreted regarding the measurements of major orbital structures. Extraocular muscles, superior ophthalmic vein, and optic nerve-sheath complex were measured on orbital MR images of these patients. The data distributions were presented by box-plot analyses for each parameter, and the measurement results were analyzed regarding gender and age groups.
RESULTS: Lateral rectus muscle thickness (LR), inferior rectus muscle thickness (IR), globe position (GP), and interzygomatic line (IZL) values were higher in the male group than in the female group (p values were < 0.001, 0.003, 0.020, and < 0.001 respectively). LR, the thickness of the superior group muscles (SUP GR), IR, superior oblique muscle thickness (SOBL), and the thickness of optic nerve-sheath complex (ON) values indicated a significant relationship between age groups. There was a significant, positive, and low-level correlation between age and LR, SUP GR, and IR values (p values were < 0.001, 0.001, and < 0.001, respectively).
CONCLUSIONS: This study provides quantitative data on normative values of orbital structures with gender and age group comparisons. Clinicians or surgeons can easily use the measured values to gather diagnostic information from the orbital region.
摘要：
目的：了解轨道外结构的标准值将提供有用的信息，以更好地解释放射学图像并将其用于诊断目的。这项研究旨在揭示磁共振图像上测得的主要眼外结构的平均值。
方法：在这项回顾性横断面研究中，我们对128例患者的256个轨道的磁共振(MR)图像进行了重新解释,以测量主要轨道结构.眼外肌,眼上静脉,在这些患者的眼眶MR图像上测量视神经鞘复合体。数据分布通过每个参数的箱线图分析来呈现，并对测量结果进行性别和年龄组的分析。
结果：侧直肌厚度（LR），下直肌厚度（IR），地球位置(GP)，男性组和骨间系（IZL）值高于女性组（p值分别为<0.001、0.003、0.020和<0.001）。LR,上群肌肉的厚度（SUPGR），IR,上斜肌厚度（SOBL），视神经鞘复合体（ON）的厚度值表明年龄组之间存在显着关系。有一个重要的，积极的,年龄和LR之间的低水平相关性，SUPGR,和IR值（p值分别为<0.001、0.001和<0.001）。
结论：本研究通过性别和年龄组比较提供了轨道结构标准值的定量数据。临床医生或外科医生可以容易地使用测量值来从眼眶区域收集诊断信息。
方法：在这项回顾性横断面研究中，我们对128例患者的256个轨道的磁共振(MR)图像进行了重新解释,以测量主要轨道结构.眼外肌,眼上静脉,在这些患者的眼眶MR图像上测量视神经鞘复合体。数据分布通过每个参数的箱线图分析来呈现，并对测量结果进行性别和年龄组的分析。
结果：侧直肌厚度（LR），下直肌厚度（IR），地球位置(GP)，男性组和骨间系（IZL）值高于女性组（p值分别为<0.001、0.003、0.020和<0.001）。LR,上群肌肉的厚度（SUPGR），IR,上斜肌厚度（SOBL），视神经鞘复合体（ON）的厚度值表明年龄组之间存在显着关系。有一个重要的，积极的,年龄和LR之间的低水平相关性，SUPGR,和IR值（p值分别为<0.001、0.001和<0.001）。
结论：本研究通过性别和年龄组比较提供了轨道结构标准值的定量数据。临床医生或外科医生可以容易地使用测量值来从眼眶区域收集诊断信息。
