放射治疗是头颈部恶性肿瘤综合治疗过程中的重要方法,被广泛应用于恶性肿瘤的初期治疗、手术辅助治疗、放化疗结合治疗以及晚期或不可切除的恶性肿瘤的姑息治疗,可提高近10%的5年绝对生存率和整体生存率[1]。头颈部放疗的并发症包括:龋坏,黏膜炎,吞咽困难,口干症,皮炎等以及最严重的并 Radiation therapy is an important method in the comprehensive treatment of head and neck malignant tumors. It is widely used in the initial treatment of malignant tumors, adjuvant surgery, radiotherapy and chemotherapy combined with palliative treatment of advanced or unresectable malignancies, which can increase nearly 10 % 5-year absolute survival and overall survival [1]. Complications of head and neck radiotherapy include: caries, mucositis, dysphagia, dry mouth, dermatitis, etc. and most severe