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Definition of Background radiation
Background radiation definition - medical term
Radiation that comes from environmental sources
including the earth's crust, the atmosphere, cosmic rays, and radioisotopes. Natural
sources of radiation account for the largest amount of radiation exposure received
by most people each year with medical and occupational sources accounting for only
a fraction of that exposure. It is currently believed that radon, a gas produced
by radium decay within rock, constitutes the major source of background radiation
throughout many parts of the US. The buildup of radon in inadequately ventilated
homes may pose a long-term health hazard. The deleterious effects of background
radiation, estimated as causing 1-6% of spontaneous genetic mutation, rise with
dose.
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