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目的：分析研讨MRI诊断膝关节原发性骨坏死的临床意义。方法本次讨论中所研讨的80例患者均随机从我院2013年5月至2016年2月期间收治的膝关节原发性骨坏死患者中筛选而出，所有患者经CT、X线及MRI检查，分析其检查结果。结果经X线检查有10例病变，其检出率为12．50％（10／80）；CT影响检查有43例病变，其检出率为59．75％（43／80）；MRI检查显示80例患者均显示出病变，其检出率为100．00％（80／80），共检出94出病灶，分别在内侧股骨踝52处，内侧胫骨平台19处，髌骨14处，外侧股骨踝4处，外侧胫骨平台3处；80例病人均在T1WI序列中表现出低信号区域，而在脂肪抑制序列中表现出骨髓中高信号区域；MRI检查结果与CT检查、X线对比差异显著，组间数据有统计学意义（P＜0．05）。结论 MRI技术有着准确性高、敏感度强及无创等特点，可清晰地显示出病灶特征性的信号区域，其在诊断膝关节原发性骨坏死中，具有应用及推广价值。“,”Objective to analyze the clinical significance of MRI in the diagnosis of primary bone necrosis of the knee joint.Methods the discussion in the study of 80 patients were ran-domly from admit ed in our hospital in May 2013 to 2016 during the month of February of the knee joint primary bone necrosis patients screening out,al patients by CT,X-ray and MRI.A-nalysis the examination results.Significant dif erences between results showed 3 4 14(43/80(10/80). Results the X-ray examination of 10 cases of lesions,the detection rate was 12.5%;CT examination of 43 cases of lesions,the detection rate for 59.75%;MRI examination showed 80 pat-ients.