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目的:探讨MRI联合CT用于游离型腰椎间盘突出症的诊断效果。方法:选择2018年5月至2019年8月衢州市中医医院收治的游离型腰椎间盘突出症患者89例为研究对象，均经手术最终确诊，确诊前患者均行CT、MRI检查，并将CT与MRI检查结果与手术结果进行比较；绘制ROC曲线，分析MRI联合CT在游离型腰椎间盘突出症患者中的诊断效能(包括：诊断敏感性、特异性)。结果:所有患者经手术确诊，CT检查最终确诊74例，与手术病理诊断符合率为83.15%；MRI检查最终确诊82例，与手术病理诊断符合率为92.14%(χn 2＝1.295，n P>0.05)。MRI检查符合率高于CT检查(χn 2＝6.390，n P0.05)；MRI检查钙化、积气阳性率低于CT(χn 2＝4.591、6.456，均n P<0.05)；MRI检查椎间盘变性、硬脊膜受压及脊髓变性阳性率高于CT检查(χn 2＝5.131、7.439、6.451，均n P<0.05)。ROC曲线结果表明，MRI联合CT在游离型腰椎间盘突出症患者中的诊断敏感性、特异性均高于单一MRI或CT检查(χn 2＝5.395、6.416和6.391、7.344，均n P0.05). The coincidence rate of MRI examination was higher than CT examination(χn 2=6.39, n P0.05). The positive rate of calcification and gas accumulation of MRI examination were lower than those of CT examination(χn 2=4.591, 6.456, all n P<0.05). The positive rates of disc degeneration, dural compression and spinal degeneration of MRI examination were higher than those of CT examination (χn 2=5.131, 7.439, 6.451, all n P<0.05). ROC curve results showed that the diagnostic sensitivity and specificity of MRI combined with CT in patients with free lumbar disc herniation were higher than those of single MRI or CT(χn 2=5.395, 6.416 and 6.391, 7.344, all n P<0.05).n Conclusion:The use of MRI combined with CT in patients with free lumbar intervertebral disc herniation can obtain a high diagnostic coincidence rate, and these two types of imaging combined examination have high sensitivity and specificity, which can provide imaging basis and reference for clinical treatment.It is worthy of promoting and applying.