现代放射治疗设备中用得最多的是钴60治疗机和医用直线加速器。由于这种机器把放射线直接作用于人类,对于它的性能及剂量必须要有严格的管制,要有专职的管理人员和监督人员,否则不但事故能导致病人或工作人员的生命危险。就是在正常的治疗工作中,据许多文献报导,对某些肿瘤患者的治疗,即使有5%的剂量误差就可引起治疗效果的明显差异。 Modern radiotherapy equipment is the most used cobalt 60 treatment machine and medical linear accelerator. Since this machine acts directly on human beings as a radiation source, its performance and dosage must be strictly controlled, with full-time management and supervisory staff. Otherwise, not only accidents can lead to the patient’s or staff’s life’s danger. It is in the normal treatment work, according to many reports in the literature, for some patients with cancer treatment, even with a 5% dose error can cause significant differences in the treatment effect.