放射治疗的机制有哪些 武静 山西省肿瘤医院
放射治疗的机制有哪些 武静 山西省肿瘤医院
射线进入人体发生作用分为两类。直接作用。间接作用。直接作用就是，放射线的粒子直接和靶原子发生作用，产生电离和激发发生生物学的改变。间接作用就是，发射的射线的高能的粒子和靶原子的刺激的电子相互作用，产生自由基和靶原子发生作用产生生物学的改变。它们最终导致的效应是让肿瘤细胞DNA的双链的断裂，让肿瘤细胞不能复制。直接杀灭癌细胞。
What are the mechanisms of radiotherapy
There are two kinds of effects of ray entering human body. Direct effect. Indirect effect. The direct effect is, Radiation particles interact directly with the target atoms, Produce ionization and excitation to produce biological changes. The indirect effect is, The energetic particles of the emitted rays interact with the stimulated electrons of the target atoms, Free radicals and target atoms interact to produce biological changes. Their ultimate effect is to break the double strands of DNA in tumor cells, So that tumor cells cannot replicate. Kill cancer cells directly.