膝关节运动性骨挫伤的MRI诊断

目的探讨膝关节运动性骨挫伤的MRI特征及诊断价值。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32例进行回顾性分析。结果 32例患者骨挫伤45处,合并韧带损伤12处,半月板损伤5例,软骨损伤2例。根据骨挫伤MR表现分为3型:Ⅰ型(14例),为邻近膝关节骨骺或干骺端松质骨内斑片状、地图状异常信号改变,边缘模糊。Ⅱ型(5例),除与I型表现相似外合并骨皮质连续性中断。Ⅲ型(13型),为紧靠皮质下局灶性的异常信号区。结论 MRI能揭示膝关节骨挫伤的病理改变,准确显示膝关节骨挫伤的部位和范围及有无其它附属结构的损伤,是膝关节骨挫伤的最佳检查手段。

MR Imaging diagnosis of sporting related bone contusion of the knee joint

Objective To investigate MR imaging features and diagnostic value of sporting related bone contusion of the knee joint. Methods Thirty-two cases of ahnormal marrow signal in MRI but without fracture in knee in X-ray plain film were respectively analyzed. Results Forty five lesions of bone contusion were identified in total 32 cases. 12 cases with ligament and 5 cases with meniscus inujres, 2 cases with cartilage injures. The bone contusions in MRI can be divided into 3 types： Type I （11 cases）, patch-like, map-like abnormal signals in metaphyses and diaphyses near knee joint with ob scure boundary; Type II （5 cases）, resemble Type I, but accompany discontinunance of cortical bone; Type III（13 cases）, localized abnormal signals under cortical bone. Conclusion MR depicts the pathologic changes in bone contusion of knee joints, can accurately display the location and area of the knee joint as well as its adjunctive strunctive injury; hence it is the most effective means for the diagnosis of bone contusion of knee ioints.