颅脑创伤致胼胝体损伤的MRI表现及诊断价值

目的分析颅脑创伤致胼胝体损伤的MRI影像学表现及诊断价值。方法回顾性分析本院2016年2月~2020年11月诊治的103例胼胝体损伤患者一般资料，均为颅脑创伤所致，且均在本院接受MRI和CT检查。观察患者MRI和CT影像学表现，并比较MRI和CT的诊断效能，并分析不同类型胼胝体损伤的MRI参数值。结果MRI检查显示99例患者增强扫描无明显强化、边缘清楚，4例患者存在强化或边缘不清晰，其中45例非出血性损伤患者，T1WI呈现等信号或者低信号，T2WI和DWI均呈现稍高信号，同时各扫描序列中均未见出血信号，58例出血性损伤患者，各扫描序列上均呈混杂信号，且可见出血信号；MRI和CT对膝部损伤、压部损伤以及体膝部损伤检出率比较无显著差异(P>0.05)，但MRI对体部损伤检出率明显高于CT(P < 0.05)；MRI和CT对出血性损伤诊断准确率比较无显著差异(P>0.05)，但MRI对非出血性损伤、胼胝体萎缩、软化灶以及胶质增生诊断准确率显著高于CT(P < 0.05)；两组患者DWI序列显示以及脑弥漫性轴突损伤评分均无显著差异(P>0.05)，但出血性损伤T2WIFLAIR、T2WI/T1WI显示明显高于非出血性损伤(P < 0.05)。结论MRI检查应用于颅脑创伤所致胼胝体损伤较CT可显示更多的病灶，可鉴别诊断出血性损伤与非出血性损伤病灶，同时可准确定位胼胝体损伤具体部位，具有较好的临床应用价值。 

Imaging manifestations and diagnostic value of MRI for corpus callosum injury caused by traumatic brain injury

ObjectiveTo analyze the imaging manifestations and diagnostic value of MRI for corpus callosum injury caused by traumatic brain injury.MethodsThe general data of 103 patients with corpus callosum injury caused by traumatic brain injury who were diagnosed and treated in the hospital from February 2016 to November 2020 were retrospectively analyzed. All of the patients received MRI and CT examinations, and the imaging were analyzed. The diagnostic efficiencies of MRI and CT were compared, and MRI parameters of different types of corpus callosum injuries were analyzed.ResultsMRI examination showed no obvious enhancement but clear edges in 99 patients, and enhancement or unclear edges in 4 patients after enhanced scan. There were 45 patients with non-hemorrhagic injury, showing equal signal or low signal on T1WI, slightly higher signals on both T2WI and DWI. Besides, no bleeding signal was observed in each scan sequence. For 58 patients with hemorrhagic injury, there were mixed signals on each scan sequence, with bleeding signals. There were no significant differences between MRI and CT in the detection rates of genu injury, splenium injury, and body genu injury (P>0.05), but the detection rate of body injury by MRI was significantly higher than that by CT (P < 0.05). There was no significant difference between MRI and CT in the diagnostic accuracy for hemorrhagic injury (P>0.05), but the diagnostic accuracy rate of MRI was significantly higher than that of CT for non-hemorrhagic injury, corpus callosum atrophy, softening lesions and gliosis (P < 0.05). There were no significant differences in DWI sequence display and DAI scores between the two groups (P>0.05). The T2WIFLAIR and T2WI/T1WI display of hemorrhagic injury was significantly better than that of non-hemorrhagic injury (P < 0.05).ConclusionCompared with CT, MRI can show more lesions in the corpus callosum caused by traumatic brain injury, and it can be used to differentiate and diagnose hemorrhagic and non-hemorrhagic lesions, and accurately locate the specific location of corpus callosum injury.