[The limit of the modifiability of cellular radiosensitivity in sequential exposure to ionizing radiation and physical factors of a nonionizing nature].
0
Citation
0
Reference
10
Related Paper
Abstract:
The application of a mathematical model of synergism in describing the consecutive combined actions of ionizing radiation and other physical agents has been considered. Using various cell systems it has been shown that the model permits to predict the highest dose modifying factor and conditions in which it can be achieved.Keywords:
Non-ionizing radiation
Radiosensitivity
Cite
Non-ionizing radiation
Cite
Citations (0)
Information is provided about the radiation to which aircrews are exposed and possible health consequences. Recommended radiation exposure limits are given. Crewmembers on commercial aircraft are exposed to higher doses of ionizing radiation than normally received by members of the general population in most parts of the world. The principal ionizing radiation is galactic cosmic radiation. On infrequent occasions, radiation from the sun leads to an increase in the ionizing radiation at aircraft flight altitudes. Radioactive cargo is another possible source of exposure to ionizing radiation. Crewmembers are exposed to nonionizing radiation in the form of electric and magnetic fields generated by the aircraft s electronic and electrical systems. Other potential sources of nonionizing radiation exposure are microwave radiation from the aircraft's weather radar, laser radiation, and ultraviolet radiation.
Non-ionizing radiation
Background radiation
Cite
Citations (23)
Data base with an electronic text on the safety assessment of low dose ionizing radiation have been constructed. The contents and the data base system were designed to provide useful information to Japanese citizens, radiation specialists, and decision makers for a scientific and reasonable understanding of radiation health effects, radiation risk assessment, and radiation protection. The data base consists of the following four essential parts, namely, ORIGINAL DESCRIPTION, DETAILED INFORMATION, TOPIC INFORMATION, and RELATED INFORMATION. The first two parts of the data base are further classified into following subbranches: Radiobiological effects, radiation risk assessment, and radiation exposure and protection.
Low Dose Radiation
Base (topology)
Non-ionizing radiation
Cite
Citations (0)
Non-ionizing radiation
Cite
Citations (1)
AbstractThe temperature-dependent light scattering properties of cholesteric liquid crystals are used as both the sensing and indicating mechanism in the formation of a passive method for monitoring non-ionizing radiation. All the monitor needs for operation is ambient light and the radiation to be measured. Radiation and thermal response characteristics are given for tests at 2.45 GHz and power density levels from 1 to 15 m W|cm2. The effects of different design and fabrication methods on the operation of the monitor are also presented.
γ radiation
Radiation monitoring
Crystal (programming language)
Cite
Citations (2)
The rapid development and distribution of radiation sources has given rise to an "Energy Pollution" paralleling the chemical contamination of the environment. It has become necessary to establish limits for the "non-ionizing radiation" as well as for the ionizing radiation to which attention has been given for a long time. The non-ionizing radiation now includes the non-ionizing electromagnetic waves - radio frequency, micro waves, optical radiation - and ultrasound. Specific effects of these different radiation qualities caused by variation in biochemical and biophysical characteristics of tissues as well as the related biological changes and the mechanism of radiation effects are discussed shortly. Some commonly occurring radiation sources are quoted.
Non-ionizing radiation
Optical radiation
Cite
Citations (0)
Pregnant women are at risk of exposure to nonionizing and ionizing radiation resulting from necessary medical procedures, workplace exposure, and diagnostic or therapeutic interventions before the pregnancy is known. Nonionizing radiation includes microwave, ultrasound, radio frequency, and electromagnetic waves. In utero exposure to nonionizing radiation is not associated with significant risks; therefore, ultrasonography is safe to perform during pregnancy. Ionizing radiation includes particles and electromagnetic radiation (e.g., gamma rays, x-rays). In utero exposure to ionizing radiation can be teratogenic, carcinogenic, or mutagenic. The effects are directly related to the level of exposure and stage of fetal development. The fetus is most susceptible to radiation during organogenesis (two to seven weeks after conception) and in the early fetal period (eight to 15 weeks after conception). Noncancer health effects have not been detected at any stage of gestation after exposure to ionizing radiation of less than 0.05 Gy (5 rad). Spontaneous abortion, growth restriction, and mental retardation may occur at higher exposure levels. The risk of cancer is increased regardless of the dose. When an exposure to ionizing radiation occurs, the total fetal radiation dose should be estimated and the mother counseled about the potential risks so that she can make informed decisions about her pregnancy management.
Non-ionizing radiation
Cite
Citations (125)
It is a general consensus that ionizing radiation is oncogenic in nature. Much of this agreement is based upon observation of increased incidence of carcinoma in a population surviving a nuclear attack or in uranium miners exposed to radiation at the workplace. The amount of radiation used by imaging modalities is negligible as compared to the abovementioned exposures. For instance, in the United States, people are exposed to average annual background radiation levels of about 3 mSv; exposure from a chest X-ray is about 0.1 mSv, and exposure from a whole-body computerized tomography (CT) scan is about 10 mSv, and that’s one of the reasons why physicians usually miscalculate the potential risks associated with the radiation exposure while performing procedures using radiologic imaging. This article will attempt to explain how to quantify radiation, the biological effect of radiation, risks to health care workers as a result of radiation exposure, and certain recommendations and tips for various medical professionals.Radiation is defined as a moving form of energy. It can be classified into two categories, i.e., ionizing and non-ionizing type. Ionizing radiations can be further classified into electromagnetic radiation (matter less) and particulate radiation.Electromagnetic radiations are energy packets (photons) traveling in the form of a wave. Basic examples of electromagnetic radiation are x-rays and gamma rays. Particulate radiation consists of a beam of particles that can be either charged or neutral. Electromagnetic radiations have high energy and can easily penetrate body tissues. Ionizing radiation is mainly used for diagnostic purposes.
Non-ionizing radiation
Background radiation
Cite
Citations (2)
Over the past quarter century, exposure to ionizing radiation from medical procedures in the U.S. has grown sevenfold, according to the National Council on Radiation Protection and Measurements. CT is a major source.
Quarter (Canadian coin)
Non-ionizing radiation
Medical radiation
Cite
Citations (0)