在使用电子加速器进行放疗过程中，可能由于设备发生剂量故障或由于设备设计不当，不能满足辐射安全、电气及机械安全要求而使患者遭受危害。也可能因设备本身含有足够强的辐射或由于设备机房设计不当而危及附近的人员，因此有关加速器性能和安全要求的规定至关重要。国家标准G In the course of radiotherapy using an electron accelerator, the patient may be harmed because of a dose failure or due to improper design of the device and cannot meet radiation safety, electrical and mechanical safety requirements. It is also possible that the requirements for accelerator performance and safety requirements are critical because the equipment itself contains sufficient radiation or the nearby personnel are endangered due to improper design of the equipment room. National Standard G