orbital cavity

Then according to the relationship between skull centroid and the centre point of orbital cavity , the centre point of orbital cavitiey is obtained .

然后根据颅骨质心与左右眼眶中心点的角度关系计算出左右眼眶中心点；

When the external pressure is constant , as we assumed that the elastic modulus of skull in the injured part of orbital cavity was reduced , the stress of optic nerve in the injured part of orbital cavity increased gradually . 3 .

外界压强保持不变，随着受损眼眶侧的颅骨弹性模量的降低，受损眼眶侧的视神经应力逐渐增大。

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 .

眼上静脉在眶内分为3段，外径平均达2.1～2.5mm。

Methods Three different procedures were used in exophthalmos patients with different ages . In patients aged 1-3 years old , the fronto-orbital advancing osteotomy to deepen the upper part of orbital cavity was employed .

方法针对不同年龄的患者，选用3种不同的手术方法：1～3岁者，选用全额骨块截骨和额眶带前移手术；

The orbit is an anatomic space located in the foreside of the face . The degree of exophthalmos is in a normal range because of the bilateral symmetry of orbital cavity .

眼眶是位于颜面部正前方的一个解剖部位，双侧眼眶对称，眼球突出度存在于一个正常范围内。

In this series , all tumors involve into the orbital cavity from the anterior ( 49 cases ) or middle fossa (( 7 cases )), including the supraorbital ridge , orbital roof and lateral wall and floor in intracranial .

全组病例中，肿瘤位于颅前凹49例，颅中凹7例，均累及眶腔的眶上嵴、眶顶或侧壁。

Surgery on the implantation of hydroxyapatite orbital implant in sclera cavity

羟基磷灰石义眼座自体巩膜腔内Ⅰ期植入手术方法

When the lesion extends deep and destroy orbital bone or adjacent tumor invades orbital cavity , CT should be further considered .

当肿瘤部位较深，有骨质侵蚀或破坏时，或怀疑邻近部位肿瘤侵犯眼眶应选CT进一步确诊；

Cranio orbital communicating meningiomas : they grew between the orbital cavity and the cranial fossa through optic canal or superior orbital fissure .

眶颅沟脑膜瘤，肿瘤通过眶上裂、视神经管或骨质破坏缺损区呈哑铃形向眶内及颅内生长，等信号，增强显著。

【 Conclusion 】 The reconstructed image is clear and with high-resolution after spiral CT scan for the measurement of orbital bone diameters and orbital volume , witch can be used in the research of orbital cavity development and orbital reconstructive .

[结论]1、螺旋CT扫描后的重建图像清晰、分辨率高，可进行眶骨径线和眶容积的测量；可用于人类眼眶发育规律的研究，也可用于眼眶畸形整复的研究。