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[目的]规范鼻咽癌常规外照射技术。[方法]头颅固定、CT和（或）模拟定位，头颈同一体位，采用低熔点铅不规则挡块技术进行等中心照射。采用面颈联合野＋下颈锁上区前切线野及面颈联合缩野＋颈后三角区野或面颈联合野＋下预锁上区前切线野及耳前野＋颈前切线野；颅内侵犯辅以颅底野。[结果]能使鼻咽、颅底、口咽、鼻腔、副鼻窦、上颈部处于同一靶区，剂量计算准确、分布合理、邻近正常组织受到有效保护。[结论]该设野方法可适用于各期鼻咽癌原发灶和区域淋巴结的常规外照射。它具有靶区剂量分布合理、操作简便、重复性好等优点，值得推广使用。
[Objective] To standardize the routine external irradiation of nasopharyngeal carcinoma. [Method] Head fixed, CT and / or simulated positioning, the same position of the head and neck, using the low melting point lead irregular stop technology for isocenter irradiation. The use of face and neck joint field + under the neck lock zone before the tangent field and face neck joint shrinkage + posterior triangular area or face and neck joint field + pre-lock on the area before the tangent line field and ear field + Internal invasion supplemented by skull base field. [Results] The nasopharynx, skull base, oropharynx, nasal cavity, paranasal sinuses and upper neck were all located in the same target area. The dose was calculated accurately and the distribution was reasonable. The adjacent normal tissues were effectively protected. [Conclusion] This method is suitable for the routine external irradiation of primary nasopharyngeal carcinoma and regional lymph nodes. It has the target dose distribution is reasonable, easy to operate, good repeatability, etc., it is worth promoting the use of.