Parameters of Observed Effects

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    Different types of radiation produce different effect.
    Different total doses of the same type of radiation will produce different effects.
    The same dose given in several fractions will give a different cell response than one dose equal to those fractions.
    Low doses can result in non-detectable immediate effects.
    Low oxygen tension will reduce effectiveness of radiation.
    Low temperature (in vitro) will reduce effectiveness of radiation.


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