下肢疲劳骨折的影像学表现分析

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目的 探讨下肢疲劳骨折的影像学特征.方法 分析经临床随访或病理证实的54例下肢疲劳骨折的影像学表现.结果 X线及CT表现:早期呈边界清晰的低密度骨折线;中期可见与骨折线方向一致、边缘模糊的横形或斜形致密线;晚期增生的骨膜边缘清楚、范围局限,呈梭形或丘形骨痂.MRI表现:骨折线、骨膜增生及骨痂均为低信号,骨折端周围的骨髓及软组织水肿呈长T、长T信号,于脂肪抑制序列TWI上呈明显高信号.结论 疲劳骨折的影像学表现具有特征性,X线、CT及MRI三者相互结合能提高诊断准确率.
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