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
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摘要: <b<目的</b< 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。 <b<材料与方法</b< 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。 <b<结果</b< 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。 <b<结论</b< 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。Abstract: <b<Objective:</b< To study MRI findings of non-hemorragic contusion of corpus callosum. <b<Methods:</b< 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. <b<Results:</b< There was no abnormal signs of corpus callosum on CT images. MR study in all 8 cases demonstrated isointense or slight hypointense signal on T<sub<1</sub<WI and obvious hyperintense signal on T<sub<2</sub<WI. 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. <b<Conclusion:</b< MRI is superior to CT on detecting non-hemorragic contusion of corpus callosum. It can provide useful supportive information for clinical diagnosis and therapy.
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