关键词: 腰椎间盘突出症, 腰椎CT, 终板屈曲深度, 屈曲角, 双侧腰大肌横断面积差值, 退变程度, 改良Pfirrmann分级

Abstract: The lumbar CT imaging data of 130 patients (observation group) with lumbar disc herniation (LDH) were retrospectively analyzed. 130 cases of lumbar spine CT examination for other reasons during the same period were selected as the control group. The comparison found that the flexion angle of L₄ upper and lower endplates, the L₅ upper and lower endplates, the S₁ upper endplate, and the difference in the cross-sectional area of the bilateral psoas major muscle of L_4-5 and L₅-S₁ in the observation group were greater than those of the control group, and were positively correlated with the modified Pfirrmann classification of LDH (P<0.05). The flexion depths of the L₄ upper and lower endplates, L₅ upper and lower endplates, and S₁ upper endplates of the observation group were lower than those of the control group, and were negatively correlated with the modified Pfirrmann classification of LDH (P<0.05). The sensitivity of each parameter cut-off value obtained by ROC analysis was >70%. Therefore, it can be considered that the sagittal flexion angle of the lumbar CT, the depth of endplate flexion, and the difference in the cross-sectional area of the bilateral psoas major can provide an effective reference value for the diagnosis of LDH and the judgment of the degree of degeneration.

Key words: lumbar disc herniation, CT of lumbar spine, depth of endplate flexion, angle of flexion, difference in the cross-sectional area of the bilateral psoas major muscle, degree of degeneration, modified Pfirrmann classification