【摘要】 目的　探讨足部踝关节周围疲劳性骨折MRI表现。方法　无明确外伤史的 15例患者 ,男 11例 ,女 4例 ,年龄 15～ 45岁 ,平均 2 2岁。X线均表现为阴性 ,临床有局部疼痛症状。MRI使用Siemensvision -plus 1.5T超导高场系统成像。常规SE序列T1 WI成像(TR TE =70 0ms 2 0ms)、FSE序列T1 WI(TR TE =470 0ms 10 0ms)和T2 WI脂肪抑制 (FS)序列。结果　 15例MRI均表现有踝关节周围骨内异常信号 ,其中有 6例在距骨、7例在跟骨、1例在舟状骨、1例同时累及跟骨和距骨。 15例共 16处均表现为受累骨内骨髓片状异常信号 ,10处为T1 低信号T2 高信号 ,6处为T1 低信号T2 混杂信号 ,脂肪抑制序列表现为明显高或混杂信号。结论　平片阴性的踝关节周围疲劳骨折的MRI表现为受累骨松质内骨小梁骨折以及骨松质内不规则水肿更多还原

【Abstract】 Objective To study the MRI features of the fatigue fracture of ankle.Methods 15 patients including 11 man and 4 women were studied.The age of the patients ranged from 15～45 years,with average of 22 years.All cases had no traumatic history of ankle joint and a negative result of plain radiographs,and its clinical symptoms was pain in the local site of feet.Siemens 1.5T MRI with SE and FSE were used to investigate the ankle,T 1WI(TR/TE=700/20)and T 2WI(TR/TE=4700/100) and T 2WI fat surpassion.Results All cases demonstrated abnormal MRI signals in both T 1 and T 2 weighted image:6 involving the talus,7 involving calcaneus,1 case located the navicular bone and 1 case involving both talus and calcaneus.15 cases with 16 were abnormalities of bone marrow,which 10 demonstrated hypointensity on T 1WI and hyperintensity on T 2WI,6 cases with hypointensity on T 1WI and complex signal intensity on T 2WI.Conclusion MR features of fatigue fracture of ankle joint without abnormality in X-ray films include trabecular fracture under cortical bone and edema in the trabecular bone which demonstrate irregular abnormal signal in MRI.更多还原