不同影像方法对股骨头缺血坏死的诊断价值

Diagnostic Value of Different Imaging Method on Aseptic Necrosis of Femoral Head

目的:研究早期股骨头无菌性坏死(aseptic necrosis of the femoral head,ANFH)的不同影像方法(X-ray、CT、MRI)诊断价值。方法:34例双侧股骨头行X线、CT和MRI检查,分析其对早期ANFH的显示能力。结果:34例患者均存在早期骨坏死表现。X线发现Ⅰ-Ⅱ期ANFH 14例,诊断准确率41.18%;CT发现Ⅰ-Ⅱ期ANFH 19例,诊断准确率57.35%;MRI发现Ⅰ-Ⅱ期ANFH 27例,诊断准确率为77.94%。结论:X线平片难以发现ANFH的早期表现,MR结合螺旋CT扫描既可发现早期病变,又可进行分期,是研究早期ANFH的可靠手段。

Objective： To study the diagnostic value of Differemt Imaging methods （X-ray, CT and MRI） on the early aseptic necrosis of femoral head（ANFH ）, Methods： The staging and imaging findings of the early ANFH in thirty-four patients were determined by using X-ray, lower-field MRI and spiral CT（ SCT ） scan to evaluate the accuracy of imaging diagnosis, Results Thirty-four patients all had the early ANFH in Ⅰ-Ⅱ stage. X-ray plain film displayed 14 cases of ANFH and the diagnostic accuracy was 41.18 %; CT showed 19 cases and the accuracy was 57.35 %; MRI showed 27 cases and the diagnostic accuracy was 77.94 %. Conclusion： It was difficult for X-ray plain film to find out the early ANFH, but MRI combined with SCT scan could not only exactly display early ANFH, but also show staging, which might be a reliable method for the study of early ANFH.