腰椎真性前滑脱的CT诊断

目的:探讨腰椎真性前滑脱的CT特征。方法:回顾性分析23例腰椎真性前滑脱患者的CT扫描结果。扫描范围从椎间盘至椎弓根下缘层面,扫描线与椎间隙平行,用薄层扫描,层厚3mm,层距3mm。结果:CT扫描显示双侧椎弓峡部不规则的骨性缺损伴骨质增生、硬化;椎管前后径增加,呈"三叶草"形;椎体后缘呈"双边征"改变;相邻椎间盘向前方凸出椎体边缘。结论:腰椎真性前滑脱具有特征性CT征象,CT扫描显示有助于诊断。

The CT Diagnosis of the True Spondylolisthesis of the Lumbar Spine

Objective To investigate the diognostic value of CT in true spondylolisthesis of the lumbar spine.Methods The CT manifestations of 23 true spondylolisthesis of the lumbar spine were reviewed retrospectively.The scanning line parallel to the intervertebra space,including the intervertebra disc to the level of lower margin of the pedicle,with thin-slice scan,3mm slice thickness and 3mm interval.Results The CT findings included:Bilateral defects in the isthmus of the vertebral pedicle with irregular margin and bony overgrowth around the defects;Lengthened of the anterior posterior diameter of spinal canal,and like "clover";Double contour of the end plates;The adjacent disc front protruded vertebral body.Conclusion There are characteristic CT features of spondylolisthesis of the lumbar spine.CT scan can help the diagnosis.