All practical activities using sources of ionizing radiation must comply with the three principles of radiation protection, namely: first, justification of practice; second, optimization of protection; and third, personal dose limitation.
There are three basic methods of radiation protection: first, time protection; second, distance protection; and third, shielding. It is worth noting that doctors use radiation devices to the patient diagnosis and treatment of disease, according to the patient's actual needs, weigh the pros and cons, to achieve the safe and reasonable use of radiation devices. And patiently persuade those who take the initiative to request but do not need to use the radiation device for treatment of patients, to guide them out of the misconception that it is not necessary to use advanced medical equipment in order to cure all diseases. In addition, with the heating up of the people's living room beautification and decoration, the pollution of the living room is also aggravating. One of the reasons for this is that some construction materials released by the dirty gas, but as long as our living room often ventilation gas, pollution can be reduced, Xingli avoiding harm, so that radioisotopes and ray devices for the benefit of mankind.