目的 探讨股骨头缺血性坏死患 者采用MRI、螺旋CT以及DR三种检测方式 对其分期诊断效果的对比分析,旨在总结 出股骨头缺血性坏死的早期影像学表现。 方法 回顾分析我院在2012年6月至2015年 6月进行诊治的资料齐全的86例股骨头缺 血性坏死患者(96个髋关节)，所有患者髋 关节处均经过MRI、螺旋CT、DR三种检测 方式对其分期诊断，诊断结果与手术后病 理学诊断结果相比较分析，运用统计学方 法比较三种检测方式阳性率之间的差异。 结果 本项研究结果显示，MRI检测诊断诊 断的阳性率为96.88%(93/96)；螺旋CT检 测诊断的阳性率为85.42%(82/96)；DR检 测诊断的阳性率为66.67%(64/96)。因此 MRI检测诊断股骨头缺血性坏死的阳性率 最高，螺旋CT次之，DR检测的阳性率最 低，MRI分别与螺旋CT和DR检测的阳性率 之间相比，差异具有显著性，有统计学 意义(χ2=64.46，P<0.01；χ2=59.63， P<0.01)。结论 股骨头缺血性坏死MRI、 螺旋CT以及DR三种检测方式中，MRI检测 的阳性率最高，对临床分期诊断股骨头缺 血性坏死具有很强的指导意义，值得临床 上进行推广。

Objective To investigate avascular necrosis in patients using MRI, spiral CT and DR comparative analysis of the three detection mode staging effect thereto, aims to summarize the early avascular necrosis imaging. Methods A retrospective analysis of our hospital in June 2012 to June 2015 for treatment of 86 cases of complete information in patients with ischemic necrosis of the femoral head (96 hips), all patients have to undergo hip joints MRI, spiral CT, DR Patterns on staging three detection, diagnosis and pathological diagnosis after surgery compared to analysis using statistical methods were compared among the three detection rate of positive ways. Results The positive rate of MRI diagnosis and diagnosis was 96.88% (93/96), the positive rate of spiral CT was 85.42% (82/96), the positive rate of DR detection and diagnosis was 66.67% (64/96). Therefore, MRI detection of avascular necrosis of the highest positive rate, followed by spiral CT, DR detection of the lowest positive rate, MRI, respectively, and spiral CT and DR detection positive rate compared to the difference was statistically significant (χ2= 64.46, P<0.01, χ2=59.63, P<0.01). Conclusion Avascular necrosis MRI, spiral CT and DR three detection modes, MRI detected highest positive rate, clinical staging avascular necrosis of great guiding significance, worthy of clinical promotion.