Through measuring the radiationquantity around surroundings where radioactive source is placed, it estimates the status of radioactive source automatically, and gives an alarm of light and sound.
仪器通过实时监测放射性源对周围环境的辐射量来判断放射性源所处的状态，并能自动予以声、光报警。
2
The quantity and quality of radiotherapy professionals, especially the radiation engineers should be improved as soon as possible.
但放疗机构和治疗设备区域分布不合理，放疗机构人员的数量和质量都亟待提高，特别是高素质放射物理师；
3
Because of the continuous decay, the quantity of radioactive material and the rate of emission of radiation decrease steadily.