长管状骨非潜水性骨梗死影像学表现分析

目的:总结9例长管状骨非潜水性骨梗死的X线、CT、MRI表现,探讨各影像学检查方法对骨梗死的诊断价值。方法:9例患者均拍摄了X线平片,7例行CT检查,2例行MRI检查;2例手术活检。结果:9例长管状骨非潜水性骨梗死共累及13个部位,股骨下段7个,胫骨上段4个,胫骨下段2个。其中2个部位经手术活检病理证实。X线平片显示髓腔内不均匀性骨化;CT显示髓腔内呈地图样改变,周围环以硬化边;MRI在T1WI和T2WI上病变中心区出现高低不等的混杂信号。结论:X线平片可以满足中晚期骨梗死的诊断,CT检查可以进一步明确诊断。MRI检查对早期骨梗死的诊断具有较高的敏感性。

Analysis of the imaging manifestation on the long tubal non-diver bone infarction

Objective:To explore the diagnosis fingings of non-diver bone infarction on plain radiography,CT and MRI,by imaging manifestation in 9 cases.Methods:All of patients were examined by plain radiography,7 cases were examined by CT,2 cases were examined by MRI,2 cases were confirmed by biopsy.Results:13 sites of the bone infarct in 9 patients were found,including 7 in the distal femur,4 in the proximal tibia,2 in the distal tibia.Two lesion sites in these patients were confirmed by operation and pathology.Plain radiography manifestation was inhomogeneous ossification in the intramedullary cavity.CT manifestation was "map-shaped"lesions with the surrounding sclerotic rim in the intramedullary cavity.T1WI and T2WI on MR showed inhomogenous mixed signal in center area of focus.Conclusion:Plain radiography can suffice for diagnosing the bone infaction in the middle and later stages.CT examination can obtain more sensitive diagnosis than plain radiography.MRI possesses a higher sensitivity in diagnosis of early bone infarction.