摘要
目的通过对医用直线加速器感生放射性的检测,研究感生放射性强度与冷却时间的关系。方法在加速器X射线能量分别为6MV、10MV和15MV时,利用射线巡检仪和451P巡检仪检测照射剂量为200cGy后0~30min内的感生放射性,对检测数据进行对比统计分析。结果随着加速器X线能量的增加,感生放射性的强度增大,冷却时间也相应延长。结论医用直线加速器感生放射性水平与X线能量和冷却时间有关。
Objective Study the relationship between the induced radioactivity and the cooling time of medical linear accelerator by the detection of induced radioactivity.Methods When the X-ray energy of the accelerator were 6MV,10 MV and 15MV,use radiation detection apparatus and 451P inspection to detect the induced radioactivity of 200cGy radiation dose within 0~30 minutes.Analyze and make statistical analysis test data.Results When the X-ray energy of accelerator increases,the induced radioactivity increases, and the cooling time is extended accordingly.Conclusion X-ray energy and cooling time affect the induced radioactivity levels of Medical linear accelerator.
出处
《中国医疗设备》
2011年第12期23-24,16,共3页
China Medical Devices
基金
内蒙古自治区自然科学基金项目(200607010915)
关键词
医用直线加速器
感生放射性
冷却时间
medical linear accelerator
induced radioactivity
cooling time
