很多肺癌患者在就诊时 ,已错过了手术时机 ,而选择放射治疗和化学药物治疗。在放射治疗过程中 ,由于一些放疗并发症的存在 ,而限制了放射剂量的提高 ,导致一些肺癌患者尤其是肺鳞癌患者局部复发率较高[1 ] 。本院在常规放疗的基础上 ,再结合立体定向放射治疗 (Ｓｔｅｒｅｏｔａ Many lung cancer patients have missed the opportunity of surgery when they visit the doctor, but choose radiation therapy and chemotherapy. In the course of radiation therapy, due to the existence of some radiotherapy complications, the increase in radiation dose is limited, resulting in a higher local recurrence rate in some patients with lung cancer, especially lung squamous cell carcinoma [1]. This hospital is based on conventional radiotherapy combined with stereotactic radiation therapy (Stereota