胫骨平台后缘骨折的MRI诊断价值

目的探讨MRI对胫骨平台后缘骨折的诊断价值。方法回顾性分析67例胫骨平台后缘骨折的MR资料,比较PDW-FS、T1WI和T2WI序列对平台后缘骨折的诊断价值;X线平片与MRI检查对照,以MRI检查结果为标准,计算X线平片的诊断符合率。结果骨折线在T1WI和T2WI上大部分呈低信号,PDW-FS上所有患者的骨折线均为高信号,较T1WI和T2WI显示的明显清楚。对骨折显示效果的分级：T1WI与T2WI比较,z=-0.181,P〉0.05,差异无统计学意义;PDW-FS与T1WI比较,z=-9.181,P〈0.05,差异有统计学意义;PDW-FS与T2WI比较,z=-9.358,P〈0.05,差异有统计学意义。以MRI检查结果为标准,X线平片检查的符合率为83.6%。结论 MRI检查能清楚显示胫骨平台后缘骨折及并发损伤,PDW-FS是较佳的序列。

MRI diagnostic value on the fracture in posterior edge of tibial plateau

Objective Discussion on the diagnostic value of MRI of the fracture in posterior edge of tibial plateau.Methods The date of MRI and x-ray plain on 67 cases of the fractures in posterior edge of tibial plateau were retrospective analysised.The image findings were viewed.The display effect of PDW-FS,T1WI and T2WI sequence on the fractures in posterior edge of tibial plateau were compared.As the MRI was standard,the diagnosis coincidence rate of x-ray plain was calculated.Results Fracture lines were mostly the low signals on T1WI and T2WI,and were all the high signals on PDW-FS which were clearer than the signals on T1WI and the T2WI.The display effect of PDW-FS,T1WI and T2WI were compared,there were not significant difference between T1WI and T2WI with z=-0.181,P 0.05;there were significant difference between PDW-FS and T1WI,with z=-9.181,P 0.05;there were significant difference between PDW-FS and T2WI with z=-9.358,P 0.05.As the MRI was standard,the diagnosis coincidence rate of X-ray plain was 83.6%.Conclusion MRI Imaging can clearly demonstrate the fractures in posterior edge of tibial plateau and accompanying injure,PDW-FS is better sequence and has better diagnostic value.