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膝关节骨挫伤的MRI研究

, PP. 1508-1510

Keywords: 磁共振成像,膝关节,骨挫伤

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Abstract:

目的探讨磁共振成像(MRI)对骨挫伤的诊断价值和意义,评价X线、CT、MRI诊断膝关节骨挫伤的效果。方法选取近年X线平片未见膝关节骨折,而MRI检查显示膝关节骨髓有异常改变的56个外伤病例,进行影像表现分析研究。结果56例X线平片均未见明确骨折征象,而MRI检查显示有骨挫伤,表现为T2WI短TI反转恢复序列(shortTIinversionrecovery,STIR)病变区呈高信号,T1WI呈稍低信号,有膝关节骨挫伤的部分病例还伴有前后交叉韧带、内外侧副韧带、内外侧半月板损伤及创伤性滑膜炎等表现。结论MRI能早期显示骨挫伤及隐性骨折,如患者外伤后X线平片或CT未见骨折,外伤部位持续疼痛并伴有软组织肿胀,不能承受重力,应做MRI检查;脂肪抑制技术STIR及化学位移脂肪成像(Chem-Sat)对显示骨挫伤的敏感性较高,能显示细微的骨髓水肿、充血及骨小梁的微骨折,对发现骨外伤的隐性损伤具有较高的诊断价值。

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