Berlis A, Putz R, Schumacher M
Ludwig-Maximilians-Universität, Munchen.
Radiologe. 1992 Sep;32(9):436-40.
This investigation of the optic canal is based on measurements of 60 macerated adult European skulls from the Alexander-Ecker Collection at the Anatomy Department of the University of Freiburg. An indian skull is also described, in which the cranial end of the left optic canal is closed by a bony plate. Computer tomographical and anatomical measurements were compared in order to assess the correlation of the two methods of investigation and the accuracy of the CT representation of osseous structures. The coronal projection of the optic canal proved to be optimal for CT examination--the sections meet the optic canal at an angle of 85.5 degrees. The measurements of transverse diameters correlate poorly, whereas vertical diameters and distances correlate well. The extent to which anatomical variations can be assessed by CT was also investigated. All anatomical variants could be observed in coronal sections, except the bony lamina in the Indian skull, which could not be seen until a contrast medium was used. The so-called "keyhole anomaly" appeared in 3.3% in our material, the "figure-of-eight" variant in 2.5%, and a carotid clinoid canal in 13.3%.
这项对视神经管的研究基于对来自弗莱堡大学解剖学系亚历山大 - 埃克尔藏品中的60个成年欧洲人颅骨标本的测量。文中还描述了一个印度颅骨，其左侧视神经管的颅端被一块骨板封闭。对计算机断层扫描（CT）测量和解剖测量进行了比较，以评估这两种研究方法的相关性以及CT对骨性结构显示的准确性。结果表明，视神经管的冠状位投影对于CT检查是最佳的——扫描层面与视神经管呈85.5度角相交。横径测量的相关性较差，而垂直径和距离的相关性良好。还研究了通过CT评估解剖变异的程度。在冠状位切片中可以观察到所有解剖变异，除了印度颅骨中的骨板，直到使用造影剂才可见。在我们的材料中，所谓的“钥匙孔异常”出现率为3.3%，“8字形”变异为2.5%，颈动脉床突管为13.3%。
