What Are the Dangers of Nuclear Medicine Radiation?

Protect personnel from ionizing radiation or radioactive material and maintain the safety of radioactive sources in practice, including measures to achieve such protection and safety, such as keeping personnel doses and hazards as low as reasonably achievable and below Various methods or equipment that specify the constraints, and various measures to prevent accidents and mitigate their consequences.

Chinese name

Nuclear medicine radiation protection

Foreign name

Radiationprotection for nuclear medicine

Overview of Radiation Protection in Nuclear Medicine

Protect personnel from ionizing radiation or radioactive material and maintain the safety of radioactive sources in practice, including measures to achieve such protection and safety, such as keeping personnel doses and hazards as low as reasonably achievable and below Various methods or equipment that specify the constraints, and various measures to prevent accidents and mitigate their consequences.

Principles of radiation protection for radiation protection in nuclear medicine

(1) Justification of practice: In order to prevent unnecessary exposure, any practice introduced with radiation exposure must undergo proper judgment, confirming that such practice has a valid reason, and that the net benefit obtained exceeds the price paid.

(2) Optimization of practice: all unnecessary exposures should be avoided, taking into account social and economic factors, and obtaining the maximum benefits at the least cost, so that all exposures are kept at a reasonably low level .

(3) Individual dose limit: While adhering to the principles of legitimization of radiation practice and optimization of radiation protection, the exposure to individuals should also be limited, that is, the dose to which individuals should be exposed should not exceed the prescribed limits. The incidence of random effects has dropped to acceptable levels.

Nuclear medicine radiation protection radiation protection measures

Open radioactive material can enter the human body through mouth, respiratory tract, skin wounds.

The key to internal radiation protection is to prevent, to do everything possible to prevent radioactive materials from entering the body, and to control the annual intake of radioactive materials within the limits set by the state. The general principle of internal radiation protection is to enclose and isolate radioactive materials, prevent proliferation, decontamination and cleaning, prevent pollution, pay attention to personal protection, and handle radioactive waste.

The externally irradiated rays mainly include X and rays. -ray external protection is mainly to consider the impact of bremsstrahlung, but also to prevent -ray damage to the skin surface and cornea.

Three principles of external exposure protection:

(1) Time protection: The radioactive operation should be proficient and rapid. If necessary, advanced practice can be practiced to shorten the time of contact with the radioactive source. Careful planning and adequate preparation should be made in advance to avoid unnecessary stays in radioactive workplaces after work is completed.

(2) Distance protection: For a point source, the radiation dose rate at a certain position is inversely proportional to the square of the distance between the position and the radiation source, plus the absorption of air, so the farther a person is from the radiation source, the radiation dose the human body receives The smaller the rate. When working with radioactive materials, use long handles as much as possible, and when possible, use robots.

(3) Shielding protection: Set a shield between the human body and the radiation source, and choose different protective materials according to the type and energy of the radiation. For example, the use of lead plates, steel plates, or general cement walls can block X and -ray radiation and gradually attenuate and absorb the rays. It is a safe and effective protective measure ^[1] .