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The committed dose in radiation protection or radiology is a measure of the stochastic (i.e., probabilistic) health effect on an individual due to an intake of radioactive material into their body. A committed dose from an internal source is intended to carry the same effective risk as the same amount of equivalent dose applied uniformly to the whole body from an external source, or the same amount of effective dose applied to part of the body. The committed dose is not intended as a measure for acute or threshold effects of radiation exposure such as erythema, radiation sickness or death. Equivalent dose is dimensionally a quantity of energy per unit of mass, and is measured in sieverts or rems. The leading model of radiation risk predicts that an effective dose of one sievert (100 rem) carries a 5.5 hance of developing cancer. The application of this model to committed dose is disputed.
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a dose that accounts for continuing exposures expected to be received over a long period of time (such as 30, 50, or 70 years) from radioactive materials that were deposited inside the body. For more information, see “Primer on Radiation Measurement” at the end of this document.
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