骨梗死的磁共振成像诊断

目的探讨骨梗死的磁共振成像（MRI）表现及其特点，以提高陔病的诊断水平。方法回顷性分析经病理证实或临床随访确诊15例骨梗死的MRI影像特点。结果15例患者总共累及21个部位．股骨下端8个，胫骨上端7个，胫骨下端2个，肱骨上端1个，桡骨下端1个，距骨2个。12例患者MRI表现符合急性骨梗死，2例符合亚急性骨梗死，1例符合慢性骨梗死。21个部位的病变均示松质骨内类圆形或不规则边界清楚的地图状改变。结论MRI是诊断骨梗死最有效方法，不仅能显示早期骨梗死的各种征象，在亚急性期及慢性期MRI均具有特征性表现．且为无创件诊断．是评估骨椰死的最件榆杏片洪

MRI diagnosis of bone infarction

Objective To study the MRI findings and features of bone infarction, in order to improve the diagnostic level of the disease. Methods Retrospeetively analyze the MRI features of 15 cases of bone infarction wtm were confirmed by pathology or clinical follow-up. Results Fifteen patients were involved in 21 parts, eight located in distal femur, seven located in proximal tibia, two located in distal tibia, one located in proximal humerus, on（： in the lower end of radius, two in giant bone block . A total of 12 patients showed MRI with acute bone infarction, 2 patients with subacute infarct of bone, 1 cases with chronic bone infarction. The 21 parts of the lesions showed a maplike cancellous bone round or irregular boundary clear change. Conclusion MRI is the most effective method for diagnosis of bone infarction, not only can display various fcatures of early bone infarction, in subacute and chronic phase MRI have characteristic features. MRI is an noninvasive diagnosis mehtod for bone infarction.