Risk Estimate Models

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    Four models: at approximately 20 rem changes in white blood cells can be seen:

  1. Linear, Non-Threshold - There is a linear risk no matter how low the dose.
  2. Quadratic, Non-Threshold - There is risk no matter how low the dose but the risk is less below a certain dose.
  3. Quadratic, Threshold - There is a threshold that exists (actual number is not known) below which there is no risk.
  4. Hormetic Threshold - There is a threshold below which no risk exists and which is beneficial to the organism.


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