论文部分内容阅读
目的 探讨低级星形细胞瘤的MRI表现特点 ,研究MRI对该类肿瘤的诊断要点和价值。材料与方法 搜集经MRI诊断及手术病理证实的低级星形细胞瘤 5 5例 ,其中应用Gd DTPA增强 5 1例 ,取 35例行MRI与手术病理对照研究。结果 发现低级星形细胞瘤边界多较清楚 ,信号较均匀 ,水肿及占位效应较轻 ,囊变、出血少见 ,分别为 36 %、1% ,增强后多不强化 ,占 5 1%。结论 低级星形细胞瘤的MRI表现有一定规律性 ,其MRI信号特点与肿瘤的病理改变密切相关
Objective To investigate the MRI features of low grade astrocytomas and to study the main points and values of MRI in the diagnosis of these tumors. Materials and Methods Fifty-five cases of low grade astrocytoma confirmed by MRI and pathology were collected. Among them, 51 cases were treated with Gd DTPA and 35 cases were performed MRI and surgical pathology. The results showed that the low grade astrocytoma border more clearly, the signal is more uniform, less edema and space-occupying effects, cystic degeneration, bleeding rare, respectively, 36%, 1%, enhanced more than non-enhanced, accounting for 51%. Conclusion Low grade astrocytoma has certain regularity of MRI manifestations, and its MRI signal characteristics are closely related to the pathological changes of the tumor