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目的:分析膝关节隐匿性骨折的磁共振成像(MRI)表现及诊断。方法:回顾性研究该院2014年10月至2015年10月收治的57例经手术、关节镜或临床证实的膝关节隐匿性骨折患者,全体患者均接受MRI检查,统计其影像学检查结果,分析隐匿性骨折的MRI表现。结果:57例患者X线平片正侧位上未见异常,MRI表现为T1W1低信号,T2W1高信号特点,呈无规则线状、条状或网状。短时翻转恢复序列中,骨折部位显像与正常骨组织有显著差异,可观察到隐匿性骨折的病变部位、范围与形态。本组57例患者,共有隐性皮质下骨折31例,隐性骨软骨骨折19例,隐性骨皮质骨折7例。结论:膝关节隐匿性骨折MRI表现特征明显,以MRI进行诊断可了解骨折严重程度、膝关节相关组织损伤,有良好的诊断价值。
Objective: To analyze magnetic resonance imaging (MRI) manifestations and diagnosis of occult fractures of knee joint. Methods: A retrospective study was performed on 57 patients with occult knee fracture confirmed by surgery, arthroscopy or clinic from October 2014 to October 2015 in our hospital. All patients underwent MRI examination and the imaging findings were analyzed. MRI findings of occult fractures were analyzed. Results: There were no abnormalities in the positive lateral radiographs of 57 patients. The features of T1W1 low signal and T2W1 high signal were irregular linear, stripe or reticular. Short-term flip recovery sequence, the imaging of the fracture site and normal bone tissue were significantly different, can be observed occult fracture site, extent and morphology. The group of 57 patients, a total of 31 cases of latent subcortical fracture, recessive osteochondral fracture in 19 cases, 7 cases of recessive cortical fracture. Conclusions: MRI manifestations of occult knee fracture are obvious. Diagnosis by MRI can be used to understand the severity of fracture and injury of knee joint, which has a good diagnostic value.