Jerry Cuttler, James Welsh - A world-wide radiation health scare was created in the late 1950s to stop the testing of atomic bombs and block the development of nuclear energy. In spite of the large amount of evidence that contradicts the cancer predictions, this fear continues. It impairs the use of low radiation doses in medical diagnostic imaging and radiation therapy. No predictions of excess cancer risk should be made for an acute exposure below 50 rem, or 0.5 Sv until there is scientific evidence to support the LNT hypothesis.