颈椎间盘突出的CT表现

本文报告37例颈椎间盘突出。CT图像上的直接征象为椎间盘向椎管内突入的软组织块影。间接征象是硬膜外脂肪、硬膜囊,蛛网膜下腔、脊髓和神经根鞘袖受压改变。椎间盘突出厚度与椎管矢状径之比称之为椎管狭窄率。脊髓受压程度与该率大小有关,当该率为19％左右时,没有或仅有下肢轻微不适;32％左右时,可有下肢无力、步行不便;48％左右时,步行困难或卧床不起。11mm可作为国人颈椎管矢状径的正常下限。

CT Findings in Cervical Disk Herniation

This is a report of 37 cases with cervical disk herniation. The direct sign of CT scanning is that a soft-tissue massis caused by the disk in the vertebral cannal. The indirect signs includiog epidural fatty, dural sac, subarachnoid, spinal cord and root sleeve were compressed posteriorly. The narrowing rate of the spinal canal can be defined the thickness if the disk herniation to the sagittal diameter of spinal canal, and is responsible for the degree of the vertebral cord. When the rate is about 19%, there is nothing or only slight discomfort of the leg; about 32%, weakness in the leg and difficult walking; and about 48%, difficult walking or rest in bed. 11 mm may be considered as the smallest normal sagital diameter in our coumtry.