目的：探讨磁共振STIR和DWI对早期疲劳骨折诊断价值，以提高对该病的诊断、鉴别诊断及愈合进行评估。方法通过对43例疲劳骨折患者的X线、C T、M RI影像学资料进行对比、分析，总结疲劳骨折X线、C T、M RI的影像学表现。结果本组病例中早期仅有临床症状的病例，X线及CT检查可为阴性，中晚期病例则X线和CT 的诊断价值无差别；磁共振对疲劳骨折的敏感性、特异性较X线和CT高，特别是T2 WI STIR和DWI敏感性更高，可作为疲劳骨折的早期诊断及对其愈合进行评估。结论疲劳骨折在磁共振检查中STIR和DWI的影像学表现有较高的特异性和敏感性，可对早期疲劳骨折进行诊断、鉴别诊断和对其愈合进行评估。%Objective To discuss the diagnostic value of STIR and DWI of MRI in the earlier phase of stress fracture in order to enhance the ability of diagnosis ,differential diagnosis ,and healing evaluation to the disease .Methods We con-trast and analyze the X-ray ,CT and MRI date of 43 cases of stress fracture ,and summary the radiological manifestion . Results In these cases ,the case that has only clinical symptom in early phase is negtive in X-ray and CT examination ,and there is no different diagnostic value between X-ray and CT in the metaphase and late stage .The specificity and sensitivity of MRI to diagose the stress fracture is higher than X-ray and CT ,especially in the T2 WI STIR and DWI is much higher , and it can make the earlier diagnosis and make evaluation to the healing .Conclusion The stress fracture has high specifici-ty and sensitivity in the STIR and DWI sequences of MRI ,so it can make early diagnosis ,differential diagnosis ,and it can make proper evaluation to the healing .
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