下肢肌肉损伤的低场MRI表现

Low Field Magnetic Resonance Imaging of Lower Limb Muscle Injury

目的分析下肢肌肉损伤的低场MRI表现。方法回顾性分析临床证实的45例肌肉损伤的患者的低场MRI资料。结果拉伤16例,表现为肌腱交界处呈T1WI低信号T2WI高信号的线状或片状影;挫伤12例;表现为直接受伤部位水肿,肌肉体积增大呈T1WI低信号T2WI高信号;血肿10例,表现为肌肉内团块状病变,因时期不同可有不同的信号表现;急性骨筋膜室综合症4例,表现为受累肌肉高度水肿、肌间隔结构模糊,呈T1WI低信号T2WI高信号;慢性骨筋膜室综合征3例,表现为特定筋膜室间腔内累及骨骼肌全长2/3以上的T1WI低信号T2WI高信号区,内可见骨骼肌溶解液化信号。结论 MRI在下肢肌肉损伤中具有重要诊断意义。

Objective To analyze the imaging of lower limb muscle injury in low field MRI. Methods The low-field MRI data of 45 patients with muscle damage confirmed by clinic were analysed retrospectively. Results Strain in 16 cases,which performed low T 1 WI high T2WI signal at the junction of tendon：contusion in 12 cakes, which performed the form of direct injuries edema, Inuscle vohlme increase in T1 WI low signal of high T2WI signal： hematoma in 10 cases, which showed mass lesions within the muscle, due to different periods may have different signal performance： acute compartment syndrome in 4 cases, which performed T1WI low T2WI high signal of affected muscle edema and blur compartment structure：chronic compartment syndrome in 3 cases, which perfi）rmed T1 WI low signal T2WI high signal area of 2/3 above of skeletal muscle length in a specific compartment, the signal of soluble liquid in the inuscle could be seen; fascial hernia 1 case, which exhibited the muscle protruding through the fascial defect and was obvious in muscle contraction. Conclusion MRI has an important significance in the diagnosis of lower limb muscle injury.