鼻咽癌是我国最常见的恶性肿瘤之一，放射治疗是它的首选治疗手段，但要提高鼻咽癌的放疗质量，除由医生制定正确、全面的治疗方案外，放疗技术人员的摆位技术以及摆位采用的放疗固定装置在整个放疗中起着重要的作用。治疗中要求达到：既要靶区照射准确，又要尽可能保护正常组 Nasopharyngeal carcinoma is one of the most common malignant tumors in our country. Radiation therapy is the first choice for its treatment. However, to improve the radiotherapy quality of nasopharyngeal carcinoma, radiotherapy technicians should be placed in addition to the correct and comprehensive treatment plan by doctors The technique and placement of the radiotherapy fixation device plays an important role in the overall radiotherapy. The treatment required to achieve: it is necessary to target accurate irradiation, but also to protect the normal group as much as possible