假性腰椎间盘膨出的CT检查所见

CT Findings of Pseudo-bulging of Lumbar Intervertebral Disc

目的研究因椎体因素致假性腰椎间盘膨出的CT征象。方法对87例腰椎间隙上下椎缘平面大小不一的CT扫描图像进行分析。在CT轴位图像上测量椎间盘与相邻椎缘平面最大横径和在定位像上测量出的椎间盘不大于相邻较大椎缘平面,且无腰椎间盘膨出的征象。结果87例中,80例L4椎体下平面>L5椎体上平面。7例L3椎体下平面>L4椎体上平面。结论CT诊断腰椎间盘膨出时,应注意膨出的椎间盘与相邻椎体平面大小的比较,以排除假性腰椎间盘膨出。

Objective To discuss CT manifestations of pseudobulging of lumbas of lumbar interevtebral disc due to the size factors of adjacent vertebral body plane. Method Ct findings of 87 lumbar intervetebral disc, which adjacent vertebral bodies had different sized margin planes, were retrospectively analyzed. On axial CT imagesthe maximum transverse dimension of the intervertebral disc and the adiacentt vertebral margin planes, as ewll as the longitudinal height of the adjacent vertebral bodies on scanogram, were measured. The results were compared. Results Sixty - seven patients were diagnosed as pseudo - bulging, who showed the same Ct signs as true lumbar intervertebral disc bulging, but the size of the ＂bulging＂ disc was smaller than the adjacent vertebral margin planes and the patients showed no symptoms and signs of disc bulging clinically. Conclusions Sehen diagnosing disc bulging, the size of the questioned disc should be compared with the size of the adjacent vertebral margin planes in order to exclude pseudo - bulging of the lumbar intervertebral disc.