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肿瘤放射治疗的根本目标,不论是根治还是姑息放疗,在于给肿瘤区域足够、精确的治疗剂量,而周围正常组织和器官受照射最少,以提高肿瘤的局部控制率,减少正常组织的放射并发症。实现以上目标的关键是对整个治疗计划进行精心设计和准确地执行。准确地执行在某种意义上是精心设计的逆过程,其中心任务是保证患者体内得到计划设计阶段所规定的靶区剂量大小及其相应的剂量分布。为保证靶区剂量的精
The fundamental goal of tumor radiotherapy, either radical or palliative radiotherapy, is to give the tumor a sufficient and precise therapeutic dose, while the surrounding normal tissues and organs are least irradiated to increase the local control rate of the tumor and reduce the radiation complications of normal tissues . The key to achieving these goals is to carefully design and accurately implement the entire treatment plan. Accurately performing the inverse process, which in a sense is well-designed, is a central task to ensure that the patient is given the target dose size and its corresponding dose distribution as planned during the planning stage. To ensure the target dose of fine