Mohn Doss, Medical Physicist in Diagnostic Imaging: The LNT Era (Linear No Threshold) has not ended yet. But, there are signs that we may be approaching its end. The problem with the LNT model for radiation-induced cancer is the absence of threshold results in the fear of the smallest amount of radiation. The LNT model was adopted by advisory bodies in the 1950 and has been endorsed by them repeatedly. Low-dose radiation boosts the immune system and so it should lead to reduction of cancers, a phenomenon known as radiation hormesis. Conclusion: The LNT mmodel is not valid and lives are being lost because of the LNT model and unjustified fear of low-dose radiation.