Objective To study of spiral CT results in degenerative lumbar spinal stenosis diagnosis,and provide reference for clinical diagnosis. Methods Received 90 cases of typical degenerative lumbar spinal stenosis patients for research and analysis,the use of spiral CT for diagnosis,analytical methods and image diagnosis. Results The occurrence site: 51.11% at L4-5 intervertebral space,42.22% at the L5 ~ S1 disc space,single-space narrowing was 64.44%,two space narrowing was 23.33%,classification criteria: 23.33% Ⅱtype stenosis and 62.22% Ⅲ type stenosis,CT manifestations: spondylolisthesis was14.44%,17.78% after vertebral osteoarthritis,facet joint hypertrophy was 4.44%,65.56% disc bulge(or highlight),12.22% of the yel ow ligament hypertrophy,11.11% of ossification of the posterior longitudinal ligament,20% of anteroposterior and transverse diameter of the central sagittal plane becomes smal er,lateral recess and foraminal narrowing was 15.56%. Conclusion The spiral CT scan lumbar intervertebral can be obtained lumbar spine images of the patient,Understand their symptoms,provide valuable reference information for clinical treatment.%目的：研究分析退行性腰椎管狭窄临床使用螺旋CT诊断的效果，为临床诊断提供参考依据。方法选取我院接收的90例典型退行性腰椎管狭窄患者来进行研究分析，使用螺旋CT来进行诊断，对诊断的方法和图像进行分析。结果发生部位：51.11%在L4-5椎间隙，42.22%在L5～S1椎间隙；单间隙狭窄64.44%，两间隙狭窄23.33%；分型标准：23.33%Ⅱ型狭窄和62.22%Ⅲ型狭窄；CT表现：14.44%椎体滑脱、17.78%椎体后缘骨质增生、4.44%椎小关节肥大、65.56%椎间盘膨出（或突出）、12.22%黄韧带肥厚、11.11%后纵韧带骨化、20%中央椎管矢状面的前后径及横径变小、15.56%侧隐窝及椎间孔变窄。结论螺旋CT进行腰椎间隙扫描能够获得患者的腰椎图像，了解其症状，为临床治疗提供有价值的参考信息。
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