目的 探讨CT与MRI在不同分期膝 半月板和关节软骨损伤患者中的诊断对 比。方法 选取2016年1月至2018年5月我 院收治的膝半月板及关节软骨损伤患者共 68例作为研究对象，全部患者均行CT与 MRI检查，以膝关节镜为诊断金标准，比 较CT与MRI诊断结果的准确性。结果 膝 半月板损伤MRI检出率为93.85%，显著优 于CT检出率81.53%，I级、II级诊断准确 率比较差异无统计学意义(P＞0.05)，III 期诊断中MRI诊断准确率显著优于CT(P ＜0.05)；关节软骨检查中MRI检出率为 96.61%，显著优于CT检出率83.05%，I 期、IIa期、IIb期、III期诊断准确率对 比无统计学差异(P＞0.05)，IV期诊断中 MRI诊断率为91.67%，显著优于CT诊断率 75%(P＜0.05)。结论 MR诊断IV期关节软 骨损伤与III级半月板损伤准确率显著优 于CT，MR与CT在其余膝半月板与关节软骨 损伤分级上均具有较高准确性。

Objective To investigate the diagnostic value of CT and MRI in patients with different stages of knee meniscus and articular cartilage injury. Methods A total of 68 patients with knee meniscus and articular cartilage injury treated in our hospital from January 2016 to May 2018 were selected and underwent CT and MRI examination. The examination results were compared with those of knee arthroscopy as golden standard. Then the diagnostic accuracy of CT and MRI was compared. Results The diagnosis rate of knee meniscus was 93.85% for MRI and 81.35% for CT. The diagnosis accuracy rate in grade I and grade II had no difference (P>0.05), while the diagnosis accuracy rate in stage III of the MRI was higher than that of the CT (P<0.05). The diagnostic rate of articular cartilage injury was 96.61% for MRI and 83.05% for CT. The diagnostic accuracy among the stage of I, IIa, IIb and III had no difference (P>0.05). The diagnostic rate for stage IV of MRI was significantly higher than that of CT (91.67% vs75%, P<0.05). Conclusion The diagnostic accuracy rate for knee meniscus and III articular cartilage injury of MRI was higher than that of the CT, and the diagnosis rate of two examinations is similar for the rest types.