腓肠肌急性运动损伤的MRI表现

The MRI findings of acute exercise gastrocnemius muscle injury

目的探讨腓肠肌急性损伤的磁共振成像(MRI)征象,为临床诊断提供依据。方法对16例临床、影像综合诊断为腓肠肌急性损伤患者的MRI影像学资料进行分析、整理,MRI成像序列包括矢状位T1加权像、T2加权像和脂肪抑制或水激发序列像,以及轴位T2加权像。结果 16例患者的X线平片均未见骨折征象。MRI上均表现为肌肉损伤区的水肿、出血和肌纤维断裂,6例有肌间隙内有少量积液。水肿在T1加权像上呈稍低信号,在T2加权像及水激发序列上呈稍高或高信号。出血在T1和T2加权像上均表现为高信号。结论 MRI能特征性显示急性腓肠肌损伤的部位与病理改变,显示X线平片和CT无法显示的软组织损伤改变,为临床诊治提供很好的影像学资料。

Objective To investigate the magnetic resonance imaging （MRI） signs of acute injury of the gastrocnemius muscle and provide the imaging method for clinical diagnosis. Methods The MRI signs in 16 cases of gastrocnemius acute inju- ry diagnosed based on clinical manifestations and MRI image were analyzed. MRI imaging sequences included sagittal T1 weigh- ted, T2 weighted image and fat suppression or excitation sequence image, and axial T2 weighted image. Results X-ray plain film showed no signs of fracture in the whole 16 patients. MRI showed the stained muscles injury zone edema, hemorrhage and muscle fiber tears. Six cases had a small amount of intra-muscle effusion. Edema showed slightly low signal on TI weighted images, the T2 weighted image and water excitation sequence showed slightly high or high signal. And hemorrhage showed high signals both on T1WI and T2WI. Conclusion MRI can show changes in the anatomical structure and pathological charac- teristics of acute gastrocnemius muscle injury, and display the change of soft tissue injury which can＇t be displayed by X-ray and CT, which provides good imaging information for clinical diagnosis and treatment of acute gastrocnemius muscle injury.