Objective: To evaluate the diameters of the spinal cord and the dural sac at the maximum sagittal level of the conus medullaris, and their significance in clinical application.

• 目的:评价正常成人脊髓圆锥水平脊髓和硬膜囊矢径、横径的正常值范围及在临床实践中的应用价值。