Health Risk and Protection from Low-Level Radiation

The cancer risk from low-level radiation.

INTRODUCTION. It is commonly stated that " any radiation dose, no matter how small, can cause cancer ". The basis for that statement is the linear-no threshold theory (LNT) of radiation carcinogenesis. According to LNT, if 1 Gy (100 rads) of exposure gives a cancer risk R, the risk from 0.01 Gy (1 rad) of exposure is R/100, the risk from 0.00001 Gy (1 millirad) is R/ 100,000, and so on. Thus th...

Radiation Protection LRL Low Activity - Level

Risk of low-level ionizing radiation from medical imaging procedures.

Medical imaging procedures with x-ray, computed tomography (CT) and nuclear isotopes use ionizing radiation.1–4 On the other hand, ultrasound and magnetic resonance imaging (MRI) do not. When biological tissues are exposed to radiation, the effects are related to the type of radiation and the amount absorbed. Units of absorbed dose are grays (Gy) (joules/kilogram). One rad (radiation absorbed d...

Low-Level Radiation Improvement of Health and Therapy of Cancer

INTRODUCTION Observations of mice, rats, and human clinical trials demonstrate the efficacy of low-dose radiation immunotherapy. The immune system is an essential component of effective antimutagenic control of the enormous burden of relentless metabolic DNA alterations produced by reactive oxygen species (ROS) leaked from mitochondria. Our modeling of the human antimutagenic biosystem includes...

Retinoblastoma and low level radiation.

The village of Seascale, near the Sellafield nuclear reprocessing plant, is best known in epidemiological circles for its longstanding high incidence ofmalignant disease in young people,' which has recently been confirmed as having persisted during 1984-90.2 Throughout, the excess has been largely accounted for by leukaemia and non-Hodgkin's lymphoma. No cases of retinoblastoma have been found ...