膝关节损伤的MRI诊断

MRI diagnosis of knee injury

目的 :探讨膝关节损伤的MRI特点、病理基础及临床意义。方法 :分析 5 2例膝关节损伤的MRI资料。结果 :半月板损伤 45例 ,MRI表现为黑色的半月板内出现结节状、线状、放射状裂隙样异常高信号 ,延伸达或未及关节软骨面两种。前交叉及后交叉韧带损伤 2 4例 ,MRI表现为在条索状黑色韧带影中出现短T1长T2 异常高信号 ,韧带变形 ,呈波浪状或不连续 ,胫骨移位。内、外侧副韧带损伤 2 8例 ,表现为信号增高 ,形态增粗 ,边缘模糊。隐匿性骨折 8例 ,表现为干骺端边界模糊的片状T1低信号影 ,T2 信号多样。讨论 :MRI对膝关节半月板、韧带损伤及隐匿性骨折的诊断有重要的临床意义 。

Objective:To study the MRI findings and its pathological morphology and clinical significance of the knee injury.Methods:52 cases with knee injury were performed MR scans.Results:Meniscal tear was diagnosed in 45 of 52 cases by MRI.It showed nodular,linear,radial fissure shaped hyperintensity signal in the hypointense meniscus. Anterior or posterior cruciate ligament injury showed short T 1 and long T 2 signal intensity,and its shape appeared wave like or discontinuous in 24 cases.Medial and lateral collateral ligament injuries in 28 cases demonstrated hyperintensity on T 2WI, thickening in shape and marginal haziness. 8 cases of periarticular occult bony fracture showed hazy patchy hypointensity signal of the border of diaphyseal epiphysis on T 1WI and variable intensity on T 2WI.Conclusion:MRI plays an important role in evaluation of knee injuries and provides detailed information for treatment planning.