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The biphasic dose-response model and the definition of a low dose of radiation. Reprinted with permission from Cuttler JM [20], © 2020 SAGE Publications and adapted for this publication. Reference [35], Fig. 1 suggests that optimal radiation-induced stimulation of the protection systems occurs when the dose is between 0.1 to 0.5 Gy. The threshold for adverse effects due to an acute exposure (dose fraction) of the brain is about 3 Gy.
