【摘要】 目的探讨四肢关节专用MRI诊断疲劳性骨折的价值。方法回顾性分析46例经临床诊断或随访证实的疲劳性骨折的X线和MRI影像资料。结果 46例数字化X线摄影均未见明确骨折线,而MRI不仅能显示疲劳性骨折的骨折线,而且能显示骨折周围骨髓腔、软组织的水肿和出血,骨膜反应等变化。骨折线在T1WI和T2WI均呈低信号,TSE-T2WI和GE-STIR为诊断骨挫伤的最有价值的序列。17例骨膜反应中,12例T2WI表现为包绕骨皮质的环形等或略高信号,5例为低信号。结论四肢关节专用MRI对疲劳性骨折能作出早期诊断,对临床鉴别诊断和早期干预治疗意义重大。更多还原

【Abstract】 Objective To investigate the value of the dedicated extremity MRI in diagnosing fatigue fracture. Methods Xray and MRI data of 46 cases with fatigue fracture confirmed by clinical diagnosis or follow-up were retrospectively analyzed. Results 46 cases had no definite fracture line in DR. MRI could demonstrate not only the fracture line,but also the swelling and hemorrhage of marrow cavity and the soft tissue. The fracture line was low signal intensity on T 1 WI and T 2 WI. TSE-T 2 WI and GE-STIR were the most valuable sequence in diagnosing bone injury. 12 of 17 periosteal proliferation cases showed ring form of iso-or minimal high signal intensity encased cortical bone,the other 5 cases showed low signal intensity. Conclusion The dedicated extremity MRI is of great value in the early diagnosing of fatigue fracture for clinic antidiastole and early treatment.更多还原