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Health Effects of Exposure to Low Levels of Ionizing Radiation BEIR V (1990) / Chapter Skim
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Glossary
Pages 391-400

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From page 391...
... The mean energy imparted by ionizing radiation to an irradiated medium per unit mass. Units: gray (Gy)
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From page 392...
... BEIR III. Refers to the third National Research Council's Committee on Biological Effects of Ionizing Radiation, as well as to the report published by this committee in 1980.
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From page 393...
... Dose equivalent. A quantity that expresses, for the purposes of radiation protection and control, an assumed equal biological effectiveness of a given absorbed dose on a common scale for all kinds of ionizing radiation.
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From page 394...
... Radiation sufficiently energetic to dislodge electrons from an atom. Ionizing radiation includes x and gamma radiation, electrons (beta radiation)
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From page 395...
... Low LET Radiation characteristic of light charged particles such as electrons produced by x rays and gamma rays where the distance between ionizing events is large on the scale of a cellular nucleus. High LET: Radiation characteristic of heavy charged particles such as protons and alpha particles where the distance between ionizing events is small on the scale of a cellular nucleus.
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From page 396...
... Projection model. A mathematical model that simultaneously described the excess cancer risk at different levels of some factor such as dose, time after exposure, or baseline level of risk, in terms of a parametric function of that factor.
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From page 397...
... , the distribution factor and any other necessary modifying factor. RERE Radiation Effects Research Foundation; a binationally funded Japanese foundation chartered by the Japanese Welfare Ministry under an agreement between the the U.S.N and Japan.
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From page 398...
... . Standard mortality ratio is the ratio of the disease or accident mortality rate in a certain specific population compared with that in a standard population.
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From page 399...
... United Nations Scientific Committee on the Effects of Atomic Radiation publishes periodic reports on sources and effects of ionizing radiation. x radiation.
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Key Terms

  • excess risk
  • dose equivalent
  • ionizing radiation
  • x rays
  • charged particles

  • atomic nuclei
  • unit mass
  • exposed population
  • unit dose
  • mortality rate

  • gamma rays
  • ionizing events
  • relative risk
  • latent period
  • lognormal distribution

  • absorbed doses
  • alpha particles
  • associated normal
  • dose rate
  • mortality ratio

  • electromagnetic radiation
  • biological effectiveness
  • standard mortality
  • numerically equal
  • somatic effects

  • distribution factor
  • minimum latent
  • gamma radiation
  • quadratic term
  • radiation dose


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