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Healing propreties of Radioactive Isotopes
Transcript of Healing propreties of Radioactive Isotopes
In most cases, radiation is used to treat diseased organs, or tumours.
Over 10,000 hospitals around the world use radioactive isotopes in medical treatment.
Technetium-99 is used as a radioactive tracer and can be detected in the body with gamma cameras.
Technetium-99 has a half-life of 6.0058 hours,this short half life is used in medical activities because it reduces the patients exposure to radiation.
The most common radioisotope used in diagnosis is technetium-99, with some 40-45 million procedures per year.
Technetium-99 decays by a process called "isometric" which emits gamma rays and low energy electrons.
Since there is no high energy beta emission the radiation dose to the patient is low
Reports showed that the average American's total yearly radiation exposure had increased 3.6 millisievert to 6.2 millisievert per year since the early 1980's, because of medical related procedures.
Diagnostic techniques in nuclear medicine use radioactive tracers (technetium-99) which emit gamma rays from within the body.
Pure gamma emission is the desirable decay mode for medical imaging because other particles deposit more energy in the patients body than in the cameras.
The global radioisotope market was valued at $4.8 billion in 2012, with medical radioisotopes accounting for about 80% of this, and is poised to reach about $8 billion by 2017.
The use of radioisotopes for medical diagnosis and treatments results in the generation of mainly low-level waste (LLW). This waste includes paper, rags, tools, clothing and filters, which contain small amounts of mostly short-lived radioactivity.
Many radioisotopes are made in nuclear reactors, some in cyclotrons. Generally neutron-rich ones and those resulting from nuclear fission need to be made in reactors, neutron-depleted ones are made in cyclotrons.