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放射治疗设计就是根据病人的个体特征,布置照射野,得到一个最适合于该病人的剂量在体内的分布。要求(一)靶区(肿瘤及有关的淋巴结)剂量均匀。(二)保证放射敏感器官受到的剂量不超过它的耐受量。(三)受到照射的一切正常组织的总剂量不很大。此外,不允许体内某些部位剂量特别大(热点),肿瘤边沿某处剂量特别小(冷点)以及靶区剂量对入口处剂量的比值较大。满足这些要求的剂量分布称最佳分布,该种布
Radiation therapy design is based on the patient’s individual characteristics, the layout of the radiation field, get a most suitable for the patient’s dose distribution in the body. Requirements (a) target (tumor and lymph nodes) dose uniformity. (B) to ensure that the radiation-sensitive organ dose does not exceed its tolerance. (C) The total dose of radiation from all normal organizations is not large. In addition, some sites in the body are not allowed to have particularly large doses (hot spots), particularly small doses (cold spots) at the tumor margins and larger doses at the target site. The dose distribution that meets these requirements is called the best distribution