Summarized by Plex Health
Last Updated: 10 May 2022
photodynamic therapy: argon-ion laser "photodynamic therapy: argon-ion laser", by Unknown Photographer. Photodynamic therapy (PDT) is a procedure to treat cancer. Patients are injected with a photosensitizer which is a light sensitive drug selectively retained by cancer cells. When exposed to laser light, the photosensitizer in the...

It can come from unstable atoms that undergo contaminated decay, or it can be generated by machines. There are two types of radiation: non-ionizing radiation and ionizing radiation. Non-ionizing radiation has sufficient energy to move atoms in a molecule around or cause them to shake, however not nearly enough to remove electrons from atoms. Ionizing radiation has so much energy it can knock electrons out of atoms, a process referred to as ionization. Radioactive elements release ionizing radiation as their atoms undergo radioactive degeneration. Contaminated decay is the emission of energy in the type of ionizing radiationionizing radiationRadiation with so much energy it can knock electrons out of atoms. Ionizing radiation can affect the atoms in living things, so it positions a health and wellness risk by harmful tissue and DNA in genes. The ionizing radiation that is released can consist of alpha particlesalpha particlesA type of particle ionizing radiation composed of 2 neutrons and 2 protons. Alpha fragments present no exterior or straight radiation danger; nevertheless, they can pose a major health hazard if ingested or inhaled. , beta particlesbeta particlesA type of particulate ionizing radiation made up of small, fast-moving particles. Some beta particles are capable of penetrating the skin and causing damage such as skin burns. Gamma rays can pass totally via the body; as they go through, they can cause damages to tissue and DNA. Contaminated decay happens in unpredictable atoms called radionuclides. EPA's goal in radiation security is to secure human health and the environment from the ionizing radiation that comes from human use of contaminated components.

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