放射治疗是肿瘤治疗的四大支柱之一,因而具有十分重要的作用,目前常采用手术前后辅助性放疗,在对实体肿瘤综合治疗的总体疗效中贡献至少约20%。近年来,放疗在理论和技术上均有很大的进步,尤其是新型人工合成放射源的应用,已使放射治疗朝着更加准确和微创化发展。近距离放疗(bra Radiation therapy is one of the four pillars of oncology treatment and therefore plays a very important role. Preoperative and postoperative adjuvant radiotherapy is commonly used and contributes at least about 20% of the overall effect on the comprehensive treatment of solid tumors. In recent years, radiotherapy has made great advances both in theory and in technology. In particular, the application of new synthetic sources has led to the development of more accurate and minimally invasive radiotherapy. Brachytherapy (bra