there are certain measures that could be taken to help reduce the impact. An example of an unavoidable carcinogen is exposure to ultraviolet rays directly from the sun. Using sufficient sun block that has a strong enough SPF can reduce the impact of those rays. There are also avoidable carcinogens that people knowingly expose themselves to. An example of an avoidable factor is exposure to ultraviolent rays from
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Danger of ionising radiation Non ionizing radiation refers to any type of electromagnetic radiation that does not carry enough energy per quantum to ionize atoms or molecules—that is‚ to completely remove an electron from an atom or molecule. Instead of producing charged ions when passing through matter‚ the electromagnetic radiation has sufficient energy only for excitation‚ the movement of an electron to a higher energy state. Ionizing (or ionising) radiation is radiation composed of particles
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The PET scan‚ or Positron Emission Tomography‚ was born in 1973 at Washington University. It was created by Edward Hoffman‚ Michael M. Ter-Pogossian‚ and Michael E. Phelps; Phelps is most often credited with the invention (History of PET and MRI‚ 2009). In preparation for a PET scan‚ radioactive tracers are injected into the body‚ inhaled‚ or ingested by the patient through a solution that they drink. Then the scan will actually begin‚ as the patient lies on a table‚ which glides into the machine
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in the discharge tube. A fluorescent glow appeared on the glass opposite to cathode. The colour of glow of the glass depended on the type of glass‚ it being yellowish-green for soda glass. The cause of this fluorescence was attributed to the radiation which appeared to be coming from the cathode. These cathode rays were discovered‚ in 1870‚ by William Crookes who later‚ in 1879‚ suggested that these rays consisted of streams of fast moving negatively charged particles. The British physicist
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RADIATION HISTORY Basic Terminology Radiation - A form of energy carried by waves or stream of particles (photons) X-radiation - A high-energy radiation produced by the collision of a beam of electrons with a metal target in an x-ray tube High-energy Radiation - A form of radiation that is able to pass through substances (e.g. the human body) X-ray - A beam of energy that has the power to penetrate substances and record image shadows on photographic film Radiology
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CELLULAR RESPONSE TO IONIZING RADIATION The efficacy of diagnostic imaging resembles a double-edged sword in the medical industry. A radiographer trained to image a patient correctly must use all knowledge to keep the radiation level at its lowest and safest level to produce the best quality image possible. However‚ the radiation level still has an effect on the patient that can go unseen by the naked eye. Ionizing radiation produced by x-ray‚ gamma rays‚ alpha & beta rays‚ can have an effect
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Section 1: What is radioactivity? Nuclear Radiation During radioactive decay‚ the unstable nuclei of these isotopes emit particles‚ or release energy‚ to become stable isotopes‚ as Figure 1 shows. After radioactive decay‚ the element changes into a different isotope of the same element or into an entirely different element. Recall that isotopes of an element are atoms that have the same number of protons but different numbers of neutrons in their nuclei. Different elements are distinguished
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information on every organ system in the body. Nuclear medicine is a special branch of medicine or medical imagery. It uses radioactive isotopes that rely on the process of unstable atomic nucleic emission of ionizing particles and radiation to diagnose and treat disease. Radiation looks at both the function and the anatomy of the body to establish a diagnosis and treatment. The tests use small amounts of radioactive material to assist with diagnosis. Radiopharmaceuticals or radiotracers are the radioactive
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Cobalt 60 Mode of decay: Beta particles and gamma radiation Chemical properties: Metallic solid that can become magnetically charged What is it used for? Co-60 is used medically for radiation therapy as implants and as an external source of radiation exposure. It is used industrially in leveling gauges and to x-ray welding seams and other structural elements to detect flaws. Co-60 also is used for food irradiation (http://www.cdc.gov/ncidod/dbmd/diseaseinfo/ foodirradiation.htm)‚ a sterilization
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Tips on Radiation Exposure CINCINNATI‚ Oct. 2‚ 2012 /PRNewswire-USNewswire/ -- With millions of X-rays performed on children every year‚ kids are more likely to receive X-rays than any other type of imaging exam. A new education campaign seeks to equip parents with the knowledge they need to make informed decisions about their kids and X-rays. Through a series of online teaching materials aimed at parents and medical professionals‚ Image Gently’s "Back to Basics" campaign promotes radiation protection
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