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对于恶性肿瘤的放射治疗,临床上采用的基本上是属于低密度电离辐射。放射治疗医生的主要任务,就是要在病灶处造成最大可能的组织吸收剂量,并使周围健康组织受到最小的损伤。以往实践证明,用X射线和γ射线的最大病灶吸收剂量造成对肿瘤所谓的“破坏”,对一些晚期病人仍不足以达到根治肿瘤的目的。Suit证实,在175000例接受放射线治疗的病人中,有58500(33％)例是死于
For radiotherapy of malignant tumors, what is clinically used is essentially low-density ionizing radiation. The main task of the radiotherapy physician is to create the maximum possible tissue absorbed dose at the lesion and to minimize the damage to the surrounding healthy tissue. Previous practice has shown that the maximum lesion absorbed doses of X-rays and gamma rays cause so-called “destruction” of the tumor, and it is still insufficient for some advanced patients to achieve the goal of radical tumor treatment. Suit confirmed that of the 175,000 patients who received radiation therapy, 58 500 (33%) died of