精确放疗能够增加治疗增益比 ,提高了肺部肿瘤的局部控制率。然而 ,肺部肿瘤随呼吸运动是制约放疗剂量提高的主要因素之一 ,如何减少呼吸运动对精确放疗的影响 ,已经成为国内外研究的热点。现综述近几年国外有关研究进展 Precise radiotherapy can increase the treatment gain ratio, improve the local control of lung tumors. However, lung cancer with respiratory movement is one of the main factors restricting the dose increase of radiotherapy. How to reduce the influence of respiratory motion on radiotherapy has become a hot research field at home and abroad. Now summarize the research progress in recent years abroad