磁共振诊断应力性骨折的应用价值研究

Clinical value of MRI in diagnosis of stress fracture

目的:探讨磁共振(magnetic resonance imaging,MRI)在应力性骨折中的临床诊断价值。方法:分析我部野战医疗所2015~2016年收治的12例下肢应力性损伤患者的影像学诊断资料,所有患者均行X线片及MRI检查,分析诊断结果,选择下肢应力性骨折的最佳影像学诊断方法。结果:12例患者伤后2~3周X线片均未见明显异常;同期行MRI检查可见明显骨髓水肿,T1、T2加权像均可见线状低信号影。伤后4~6周X线片可见明显骨痂形成,证实骨折。结论:下肢应力性骨折主要发生在股骨髁、胫骨上端、胫骨远端、距骨、跟骨、跖骨等部位,伤后X线片难以诊断,但MRI显示明显骨折影像特征,能有效提高诊断准确率,避免误诊。

Objective：To evaluate the clinical value of magnetic resonance imaging（MRI）in the diagnosis of stress fracture.Methods：The imaging diagnostic data of twelve cases with stress injury in the field medical center from 2015 to 2016 were analyzed.All patients were examined by X-ray and MRI,and the diagnostic effect were analyzed.The best imaging diagnosis method of stress fracture was choosen.Results：All the patients showed no abnormal X-ray within 2 to3 weeks after injury.MRI examination showed obvious linear low signal of bone marrow edema in both T1-weighted and T2-weighted image at the same period.After 4 to 6 weeks of injury,X-ray images were implemented and showed visible callus formation,confirming the existence of previous fracture.Conclusion：Lower extremity stress fractures occur mainly in the femoral condyle,upper part of tibia,distal part of tibia,talus,calcaneus and metatarsal.X-ray image is less sensitive to diagnose it.MRI can show typical fracture features and can significantly improve the diagnostic accuracy of stress fracture.