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三维适形放射治疗技术作为一种精度很高的治疗技术,是提高治疗比的重要物理措施,它对于以局部肿瘤未控复发为主要失败原因的肿瘤患者的治疗有重要意义[1]。其设计和应用思路是:在杀灭肿瘤方面应像手术那样将足够的高剂量围歼到病灶上,使高剂量区剂量分布的形状在三维方向上与靶
As a high precision therapeutic technique, 3D conformal radiotherapy is an important physical measure to improve the treatment ratio. It is of great significance for the treatment of cancer patients whose main failure cause is the uncontrolled recurrence of local tumor [1]. The design and application of the idea is that, in killing the tumor, it should be as high as the surgery to envelop the high dose to the lesion, so that the shape of the dose distribution of the high dose region is in three-dimensional direction with the target