脑的放射性坏死通常仅在接受了总量6000rad-s(60Gy)或更多辐射的区域发生,且出现于放疗后数月或数年。放疗后一过性的早期症状通常见于三个月内,早于延迟的辐射坏死发生。当前的文献中对CT 扫描中放疗后脑坏死的早期变化几乎未予注意。作者报告了三例脑胶质瘤的放疗后表现。例1,女性,55岁,活检证实左侧丘脑多形性 Radiation necrosis of the brain usually occurs only in areas that receive a total of 6,000 rad-s (60 Gy) or more, and occur months or years after radiotherapy. Early symptoms after transient radiotherapy are usually seen within three months, earlier than delayed radiation necrosis. In the current literature, little attention has been paid to the early changes of brain necrosis after radiotherapy in CT scans. The authors report three cases of glioma after radiotherapy performance. Example 1, Female, 55 years old, biopsy confirmed thalamus pleomorphism