股骨头坏死患者CT与核磁共振诊断的比较研究

Comparison Study on CT and MR Diagnosis of Avascular Necrosis of Femoral Head

目的探讨对比CT与核磁共振对股骨头坏死患者的诊断学价值。方法我院2008年10月到2011年12月收治的股骨头坏死患者40例,分别行双侧股骨头CT、MRI影像学检查,对比两者的影像学结果。结果 40例ANFH患者共累及72个髋关节,CT、MRI诊断的检出率分别为84.7%、97.2%,两组检出率比较差异具有统计学意义(P<0.05);CT影像学检查确诊61个部位,其中I期16个部位、Ⅱ期28个部位、Ⅲ期l2个部位、Ⅳ期5个部位;MRI影像学检查确诊70个部位,其中I期18个部位、Ⅱ期30个部位、Ⅲ期l6个部位、Ⅳ期6个部位。结论 CT、MRI均可准确地显示早期股骨头坏死变化,但MRI较CT能更敏感地检出早期股骨头坏死,可作为股骨头坏死的首选检查方法。

Objectibe To explore diagnostic value of CT and MR to patients with ANFH. Methods 40 cases with ANFH between 2008.10-2011.12 were collected, and bilateral femoral heads were examined by CT and MR. The CT and MR images were compared. Results 40 cases with ANFH involved 72 joints. Detection rates of CT and MR were 84.7% and 97.2% retrospectively. The differences between two groups had statistical significance （P〈0.05）. CT showed 61 focuses（16 cases were phase I ; 28 cases were phase^6; 12 cases were phase III; 5 cases were phase IV）. MRI showed 70 focuses（l 8 cases were phase 1 ： 30 cases were phase II ; 16 cases were phase II1; 6 cases were phase IV）. Conclusion CT and MRI can show early ANFH accurately, but MRI is more sensitive, and MRI can be used as preferred examination.