论文部分内容阅读
近距离放射治疗已有近 1 0 0年的历史[1 ,2 ] 。尽管其施源布源方法和疗效有明显改善 ,但所用放射源一直为放射性核素。放射性核素不仅存在储存、运输、保管以及核废料处理的麻烦 ,而且由于核素衰减等原因 ,其治疗剂量的计算和控制也不够精确[3,4 ] 。最近 ,一种基于Ｘ射线的细
Brachytherapy has been nearly 100 years of history [1,2]. Despite the significant improvement in the sources and sources of its provenance, the radioactive sources used have been radionuclides. Radionuclides not only have the problems of storage, transportation, storage and disposal of nuclear waste, but also their calculation and control of therapeutic doses are not accurate enough due to the attenuation of nuclides [3,4]. Recently, an X-ray based fine