Method:Folium sean in the transect with CT,and measure the spinal cord is in front and back the path,Ex-cleft in yellow ligaments,and the width of the side sinks the nest,and analyse the relationship between them and spinal cord or nerve-root pressing.

• 方法:采用CT横断面薄层扫描,并测量硬膜囊矢状径、黄韧带前间隙、侧隐窝宽度,分析它们与脊髓和/或神经根受压的关系。