胼胝体非出血性损伤的CT/MRI和临床表现

CT/MRI and Clinical Findings of Non-hemorragic Contusion of Corpus Callosum

目的提高对胼胝体非出血性损伤的影像诊断水平和临床表现认识。材料与方法回顾性分析8例胼胝体非出血性损伤的临床和MRI表现。全部病例均进行了CT和MRI非增强检查,检查时间外伤后半小时至3天不等。结果所有病例的胼胝体损伤灶在CT图像上均未见明显密度异常。MRI上表现为T1WI低或稍低信号,T2WI上高信号,FLAIR序列上呈明显高信号。病灶位于胼胝体膝部4例,胼胝体压部2例,胼胝体嘴部1例,胼胝体广泛性损伤1例。8例中都合并有1处以上的胼胝体外其他部位的颅内损伤,包括多发性脑挫伤、脑内血肿、硬膜下或硬膜外血肿、蛛网膜下腔出血等。2例有MRI复查资料。结论MRI是胼胝体非出血性损伤最佳的影像学检查手段,明显优于CT,不仅对较小和轻微的挫伤敏感,而且能多方位地显示病变,为临床制定治疗方案提供依据。

Objective: To study MRI findings of non-hemorragic contusion of corpus callosum. Methods: The CT and MR images of non-hemorragic injury of corpus callosum were reviewed retrospectively. All patients were examined with CT and MR imaging within 0.5h to 3d. Results: There was no abnormal signs of corpus callosum on CT images. MR study in all 8 cases demonstrated isointense or slight hypointense signal on T1WI and obvious hyperintense signal on T2WI. There was no hemorragic signal or density on MR and CT at corpus callosum . These contusion lesions were revealed more clearly high signal intensity on FLAIR sequence. These lesions were located at splenium(2 cases), genu(4 cases), rostrum(1 cases) and splenium-body(1 cases). Several other multiple contusion and hemorragic lesions were detected in all 8 cases. Conclusion: MRI is superior to CT on detecting non-hemorragic contusion of corpus callosum. It can provide useful supportive information for clinical diagnosis and therapy .