外伤性膝关节隐性骨折的核磁共振成像表现及其诊断价值分析

MRI Findings and Diagnostic Value of Traumatic Knee Joint Recessive Fracture

为分析外伤性膝关节隐性骨折的核磁共振成像表现及其诊断价值,本次研究回顾性分析我院2017年1月~2018年12月收治的55例外伤性膝关节隐性骨折患者临床资料,分别实施核磁共振成像检查以及多层螺旋CT检查,然后以手术结果为参照,分析核磁共振成像对外伤性膝关节隐性骨折的诊断价值及具体的影像表现。经手术证实,55例外伤性膝关节隐性骨折患者中隐性骨皮质下骨折34例、骨皮质骨折14例、骨软骨骨折7例,核磁共振成像符合率高于多层螺旋CT,差异有统计学意义(P<0.05);两种影像学检查手段敏感度、特异度、准确度相比较,核磁共振成像高于多层螺旋CT,差异有统计学意义(P<0.05);外伤性膝关节隐性骨折核磁共振成像表现如下:隐性骨皮质下骨折存在大范围的地图样、网格状或线状信号区,边界模糊但骨关节面完整;骨皮质骨折呈低信号带中断,与骨髓高信号存在强烈对比;骨软骨骨折呈多层次或者是连续性中断。说明外伤性膝关节隐性骨折核磁共振成像表现具有多样性特点,仔细分析不难鉴别,可作为优选诊断手段推广使用。

To analyze the MRI findings and diagnostic value of traumatic knee joint recessive fractures, this study retrospectively analyzed 55 patients with traumatic knee joint recessive fractures from January 2017 to December 2018 in our hospital.The clinical data were analyzed by MRI and multi-slice spiral CT.The surgical results were used as reference.The diagnostic value and specific imaging findings of MRI in traumatic knee joint fractures were analyzed.According to the operation,there were 34 cases of occult subcortical fractures,14 cases of cortical fractures and 7 cases of osteochondral fractures in 55 patients with traumatic knee joint fracture.The coincidence rate of MRI was higher than that of multi-slice spiral CT(P<0.05).The sensitivity,specificity,and accuracy of the two imaging methods were compared,and the MRI was higher than the multi-slice spiral CT,the difference was statistically significant(P<0.05).The magnetic resonance imaging of the traumatic knee joint recessive fractures is as follows:there are a large number of map-like,grid-like or linear signal areas in the recessive subcortical fractures,the boundary is blurred but the osteoarticular surface is intact;the cortical fracture is interrupted by a low signal band,and there is a strong contrast in bone marrow high signal;osteochondral fractures are multilevel or continuous disruption.According to this,the magnetic resonance imaging findings of traumatic knee joint recessive fractures are characterized by diversity.It is not difficult to identify them carefully and can be used as a preferred diagnostic tool.