目的 探讨分析CT与MRI两种检查在颅骨内板下硬膜下出血诊断中的价值。方法 回顾分析我院2011年6-2015年9月经 临床证实的176例颅骨内板下硬膜下出血CT与MRI表现，按出血厚度将患者分为三组：5mm以下组，5-10mm组，10mm 以上组，比较CT与MRI两种检查结果。结果 对5mm以下组少量硬膜下出血的显示MRI明显优于CT；5-10mm组中硬膜下 出血的显示MRI略优于CT；10mm以上组硬膜下出血的显示MRI与CT一致。结论 MRI对颅骨内板下硬膜下出血的显示率 极高，尤其是对等密度的、厚度越小的硬膜下出血的显示MRI优势越明显，可作为颅骨内板下硬膜下出血诊断的重 要标准。　

Objective To discuss and analyze the CT and MRI in the diagnosis value of under the skull plate subdural hemorrhage. Methods The CT and MRI characteristics of the 176 cases, recruited from our hospital from June 2011 to September 2015, with clinically confirmed under the skull plate subdural hemorrhage were reviewed. According to the thickness of bleeding divided the patients into three groups: below 5mm group, 5-10mm group, more than 10mm group. Than compared the two results in CT and MRI. Results A small amount of subdural hemorrhage in below 5mm group showed that MRI is superior to CT. Subdural hemorrhage in 5-10mm group showed that MRI is slightly superior to CT. More than 10mm group showed that MRI and CT are basically identical. Conclusion The research showed the advantage of MRI in the diagnosis of under the skull plate subdural hemorrhage, especially for the peer density and smaller thickness of subdural hemorrhage. So MRI can be used as an important standard in under the skull plate subdural hemorrhage diagnosed.