X线平片、CT、MRI在股骨头缺血性坏死诊断中的对比分析

目的评价X线、CT与MRI对股骨头缺血性坏死（ANFH）的诊断价值并分析对比。方法对65例临床疑诊为ANFH患者进行X线平片＼CT与MRI检查，并且做X线平片、CT与MRI的对照观察，并与同期临床症状比较。结果53例经X线检查诊断为ANFH35例；经CT扫描诊断为ANFH42例；所有病例均经磁共振扫描证实为ANFH53例，其中15例为早期病变。统计结果表明，MRI为最好，CT次之，X线平片最不敏感。结论X线平片难以显示ANFH的早期表现，MRI不仅能发现其早期病变，且能反应病变的确切范围和程度，对早期治疗和预后具有积极意义，但对骨质的细微结构改变及钙化不如CT明显，且费用较高，多用于临床高度怀疑ANFH而X线平片及CT检查阴性的患者。

Imaging diagnosis of avascular necrosis of the femoral head

Objective To evaluate the diagnostic value of X-ray plain film, CT and MRI in ANFH and . Methods 65 cases were clinical suspected of ANFH, all of them were underwent rountine radiography, CT and MRI. The appearance-presented by the 3 methods were compared, a comparative analysis between the imaging features and the clinical data was done in detail. Results From 53 cases,35 cases were positive on X-ray exam- ination and 42 cases were positive on CT. 53 cases were positive on MRI. 15 cases were positive the early sign of ANFH. Conclusion MRI can provide useful information in confirming the early stage of ANFH, and is also significance in determining the extent, degree of the lesions, and early treatment as well as prediction of prognosis. But MRI has less advantages than CT in detecting minute of bone substance and calcification and is more expensive ,MRI is more useful in who is highly suspected in ANFH clinic while X-ray and CT is negative.