０简介随着放射治疗技术的飞速发展，对病灶靶区实施精确的剂量照射已成为现代放疗技术发展的主要方向。在此要求的基础上，人们提出了适形放射治疗的理论：即由医用电子直线加速器照射病人后在患者体内产生的剂量分布与患者肿瘤的形状尽可能地接近，同时尽量降低肿瘤周围... 0 Introduction With the rapid development of radiotherapy technology, the precise dose irradiation of the target area has become the main direction of the development of modern radiotherapy technology. On the basis of this requirement, the theory of conformal radiotherapy has been proposed: the dose distribution generated in a patient after being irradiated by a medical electron linear accelerator is as close as possible to the shape of the patient’s tumor while minimizing the surrounding area of ​​the tumor. .