本文综述了近几年来各国放射物理学家对优化共面放射治疗中使用均匀和非均匀射线照射所需要的射野的数量问题进行讨论的概况。介绍了用来描述剂量优化即正常组织无合并症的肿瘤控制几率的P_+模型;肿瘤控制几率TCP评价模型和正常组织合并症几率的NTCP经验方程。总结了运用各自的模式对优化放射治疗进行评价的临床研究工作。 This review summarizes the recent progress made by radiophysicists in various countries to discuss the issue of the number of fields required for the use of uniform and inhomogeneous radiation in optimizing co-planar radiotherapy. Introduced the P_ + model used to describe the tumor control probability of dose optimization, which is normal tissue without complications; NTCP empirical equation of probability of tumor control TCP evaluation model and the probability of normal tissue complications. Summarized the use of their own model to optimize the evaluation of radiation therapy clinical research.