The Linear No-Threshold assumption and its ALARA Principle: non-science that is inapplicable to medical imaging

By Dr J A Siegel, C W Pennington & Dr B Sacks

The linear no-threshold assumption (hereinafter referred to as simply LNT) is the purported scientific basis for virtually all regulatory policies throughout the world involving exposure to ionizing radiation. In particular, those involving medical imaging and occupational exposures are wrapped in the authoritative mantle of LNT.