Today: 29.Oct.2020

Mohan Doss, medical physicist, SARI, XLNT, SRI: 1. Exposure to a high dose of (ionizing) radiation over a short time, i.e., at high dose rates, as occurred to the atomic bomb survivors closest to ground zero, increases the risk of cancer. This information is irrelevant to estimating the cancer risk from the exposure to low doses and low dose rates of radiation. 2. A radiation dose under 100 mGy received over a short time (seconds or hours) is completely safe. This exposure corresponds to 10 typical CT scans and will not contribute to the risk of cancer. A radiation dose of 1000 mGy, delivered within a few minutes, i.e., a high dose rate, may, however, contribute to increasing that risk. In the case of the 2011 Great East Japan Earthquake, the residents of Fukushima should not have been evacuated. 5. We challenge the recommendations of advisory bodies, such as the ICRP and NCRP, that call for maintaining radiation doses as low as reasonably achievable (ALARA), which they base on the present LNT paradigm they have adopted.

Published in 6) SARI and XLNT

Mohan Doss, medical physicist: This article is an introduction and link to two very important websites about low-dose radiation: 1) XLNT and 2) SARI. Everyone interested in low-dose radiation and nuclear medicine should be very familiar with these websites. The modern world depends on their success.

Published in 6) SARI and XLNT

Mohan Doss, medical physicist: Top three diseases of concern - cardiovascular disease, cancer, Alzheimer's. The LNT model presents a major obstacle for performing investigative studies of prevention and treatment using low-dose radiation, in spite of available evidence. Change to a radiation protection paradigm based on radiation hormesis can facilitate progress in these and other diseases.

Mohn Doss, Medical Physicist in Diagnostic Imaging: The ICRP should rewrite the draft document based on the observed health effects of exposure to low-level radiation rather than the extrapolation of high dose data to low doses. It is not logical to determine the health effect of taking a single caplet of medicine by extrapolating the health effect of taking 50, 100, 200, 400, etc. caplets at a time, though it would be mathematically simple and convenient to do. It would be very unwise and dangerous to take actions based on such extrapolations. The ICRP should discontinue the use of the LNT model, discontinue the recommendations of low annual public radiation dose limits, and limit its discussions to avoidance of high radiation doses to the radiation workers and the public in the case of nuclear accidents.