1 Radiation Protection in the World of Modern Radiobiology: Time for A New Approach

All current radiation risk estimates and all radiation-protection standards and practices are based on the so-called “Linear No-Threshold Hypothesis”. This LNT hypothesis is in turn, based mainly on epidemiological data of humans exposed to high doses and dose rates but is considered to also apply at low doses and dose rates, with a two-fold reduction in risk. The hypothesis states that risk is linearly proportional to dose, without a threshold