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目的:应用SWI技术对脑转移瘤放疗后SWI图像变化进行分析,以总结SWI技术对放疗后的应用价值。方法:接受颅脑X-刀联合全脑照射治疗的肺癌脑转移患者15例,共36个病灶,分别于治疗前3天内和治疗后1天、1周、1个月、3个月、6个月进行常规MR检查及SWI检查,得到磁敏感加权图像,观察不同时间段肿瘤内血管的变化。结果:36个病灶中,有32例个病灶的SWI序列图像可见肿瘤内血管及瘤内部少量出血;放疗后1天时即可观察到肿瘤内血管减少,而且随着时间的延长,伴随肿瘤体积缩小肿瘤内静脉血管亦逐渐减少。结论:SWI图像可以观察肿瘤内部静脉血管的变化情况,为进一步深入研究奠定了基础。
Objective: To analyze the changes of SWI images after radiotherapy of brain metastases using SWI technique to summarize the application value of SWI after radiotherapy. METHODS: Fifteen patients with brain metastases from lung cancer undergoing X-knife combined with whole brain irradiation were treated with craniocerebral X-knife combined with whole brain irradiation. There were 36 lesions in each group, including 3 days before treatment and 1 day, 1 week, 1 month, 3 months, 6 Month regular MR examination and SWI examination to obtain a magnetically weighted image to observe the different time periods of tumor vascular changes. Results: Of the 36 lesions, there were 32 cases of intracranial blood vessels and a small amount of hemorrhage inside the tumor in SWI images. The intravascular tumor was observed at 1 day after radiotherapy. With the extension of time, tumor volume decreased Intravenous blood vessels also gradually decreased. Conclusion: SWI images can observe the changes of the internal venous blood vessels in the tumor, which lays the foundation for further study.