眶内段

正常成人眶内段视神经的MRI测量研究

MRI Measurement of the Intraorbital Optic Nerve in Normal Adults

眶内段视神经蛛网膜下腔扩张的MRI表现及临床意义

MRI features and clinical significance of the dilated subarachnoid space of intraorbital optic nerve

方法：回顾性分析56例眶内段视神经蛛网膜下腔扩张的MRI图像。

Methods : The MR images in 56 patients associated with dilated subarachnoid space of intraorbital optic nerve were retrospectively analyzed .

结果：筛前动脉眶内段长（5.16±1.24）mm，管径为（0.56±0.17）mm；

Result : The length of intraorbital segment of anterior ethmoidal artery was 5.16 ± 1.24 mm , and its diameter was 0.56 ± 0.17 mm ;

筛前动脉眶内段长度为（7.83±3.49）mm，外径为（0.80±0.24）mm；

The length of the intraorbital segment of the anterior ethmoidal arteries was ( 7.83 ± 3.49 ) mm , with an external diameter of ( 0.80 ± 0.24 ) mm ;

结论CT与MRI均能显示眶内段视神经胶质瘤，但MRI较CT能够获得更多的肿瘤内部信息，为管内及颅内视神经胶质瘤首选的影像学检查方法。

Conclusion Both CT and MRI can detect the optic glioma in intraorbital segment . MRI is superior to CT in being able to obtain more information concerning the tumor , and MRI is the choice of examination for intracranial and intracanal optic glioma .

以Reid基线为准，80.00%视神经眶内段和管内段可在同一层面上全程显示；

The intraorbital and intracanalicular segments of optic nerve could be showed in the same transverse plane in 80.00 % , which Reid 's base line was used as baseline .

眼动脉眶内段的应用解剖研究

Applied anatomy of intraorbital part of ophthalmic artery

目的：为视神经减压术提供眼动脉颅内段和眶内段的解剖学资料。

Objective : To provide anatomic data of ophthalmic artery for the decompression of optic nerve .

眼外肌运动神经眶内段的应用解剖

Applied anatomy of extraocular muscular nerves

经此入路可行眶内段视神经中段病变的切除。

The approach was selected for lesions located in the midportion of the intraorbital segment of the optic nerve .

视神经分为壁内段、眶内段、管内段和颅内段4段，在眶内呈S形走行。

Optic nerve was divided into intraocular , intraorbital , intracanalicular and intracranial segments , which was sigmoid in the orbit .

眼上静脉在眶内分为3段，外径平均达2.1～2.5mm。

The superior ophthalmic vein can be divided into three part within the orbital cavity , and the mean outer diameter is 2 . 1 - 2 . 5 mm .