目的 探讨并对比CT和MRI在诊断 膝关节前交叉韧带(ACL)撕裂的应用价值 及影像学表现。方法 回顾性分析我院63 例膝关节损伤患者的CT和MRI检查资料， 对比评价结果及影像学表现。结果 以关 节镜诊断为“金标准”，MRI诊断ACL撕 裂准确率为95.23%，显著高于CT诊断率 82.54%，具有统计学意义(P<0.05)。经 MPR技术处理后，ACL撕裂CT表现为韧带挛 缩、增宽，交叉韧带中断裂处呈低密度； ACL撕裂急性期MRI表现为T1低信号，T2高 信号；慢性期为长T1长T2信号，韧带增 粗、扭曲；断端边缘不清晰或有明显断 痕，信号异常。结论 MRI诊断膝关节ACL 撕裂中的准确性高于CT，可为临床诊治提 供更丰富的信息。

Objective To investigate the application value and imaging findings of CT and MRI in diagnosing ACL. Methods A total of 63 cases with knee ligaments injuries in our hospital were selected as study objects,and the CT and MRI data were analyzed retrospectively. Compared the evaluation results and imaging findings. Results Arthroscope was regarded as golden standard, accurate rate of MRI in diagnosing ACL was 95.23%, obviously higher than that of CT (82.54%), the difference was statistically significant (P<0.05). The CT manifestation of ACL injury was the contracture and broadening of the ligament, with the low density of the breaking point. The MRI manifestation of ACL acute injury was T1WI low signal andT2WI high signal of the ligament. Chronic phase was T1WI low signal andT2WI high signal, ligament thickening, twisted and with blurry broken edge. Conclusion Accurate rate of MRI in diagnosing ACL injury was higher than that of CT, it can provide more plentiful information.