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Dose - definition of dose by the free dictionary
Factors, called "radiation weighting factors" earlier called "quality factors"are used to convert absorbed doses in rad or gray to "equivalent doses. The information provided is not a substitute for professional advice and should not be relied upon in the absence of such professional advice.
Send us feedback. Using values that approximately represent the likelihood that the different organs may express radiation effects, organ weighting factors were developed. He needs a good dose of reality.
What is "dose"? what units are used to express radiation dose?
In some situations, however, we find that the absorbed dose does not tell the whole story. Different x-ray procedures expose different organs to different doses, and different radioactive materials inside the body tend to concentrate in different organs, giving a different pattern of vose.
Specific facts and circumstances may affect the applicability of concepts, materials, and information described herein. We talk about taking a "dose" of whiskey or getting our daily "dose" of news or anything else we wnat like; similarly, in medical applications we get "doses" of medicine.
Dose | definition of dose at bosworthforsenate.com
Verb Most patients are dosed at 50 milligrams per day. We set lower limits for radiation dose for minors, members of the public, and pregnant women. Smith, chicagotribune. If a large population of people is exposed to 5.
Dose | meaning in the cambridge english dictionary
These doses may be received from exposures to sources outside of the body external dose or radioactive js that may enter the body by being inhaled or swallowed internal dose. Some types of radiation in certain experimental conditions cause more observed effects, given the same amount of absorbed dose, than others.
In radiation protection, "dose" has a more specific meaning—it is the energy of ionizing radiation absorbed per unit ls of any material. If the body is exposed in a nonuniform manner, however, it becomes more difficult to compare different exposures. For the general public, external and internal exposures are usually estimated using simulation models which are often computer basedsupported by ie measurements made at strategic locations around facilities that may represent sources of radiation to the public.
See More First Known Use of dose Noun 15th century, in the meaning defined at sense 1a Verbin the meaning defined at sense 1 History and Etymology for dose Noun Middle English, from Middle French, from Late Latin dosis, from Greek, literally, act of giving, from didonai to give — more at date Keep scrolling for more. We can then compare different nonuniform exposures or add them together to express the total risk of a mixed-exposure situation for example, a uniform whole-body exposure to an external source in addition to inhalation of some radioactive iodine.
In many situations, the energy of radiation absorbed per unit mass of material can be related directly to radiation effects. Our system of radiation protection is based on the idea that limiting the equivalent dose received by workers estimated during a calendar year will eliminate the possibilities of workers receiving doses that can cause immediately observable effects radiation sickness, skin effects, etc.
Be advised that over time, requirements could change, new data could be made available, and Internet links could change, affecting the correctness of the answers. Another quantity sometimes used in radiation protection is the "effective dose.
Dose - wikipedia
Energy is most often given in units of ergs ergjoules Jelectron volts eVor multiples thereof for example, kilojoules [kJ] and megaelectron volts [MeV]. Additional Resources What Is "Dose"?
The information posted on this web is intended as general reference information only. Equivalent dose is only defined for human tissue that is, not for air, water, etc. To the best of our knowledge, answers are correct at the time they are posted.
If the skin is exposed to more than a few Gy ddose radiation a few hundred radthis may cause some transient or permanent reddening and, at higher doses, permanent and more severe damage may occur. Mostly we talk about the dose to people, or to parts of the body, but we can define the dose in air, water, human tissue, or any other material. If workers could be reasonably expected to take radioactive material into their bodies, they receive special evaluations by direct measurements made on the worker's body or by indirect measures, which involve measuring radioactivity leaving the body in urine i other materials.
If each organ is multiplied by its weighting factor and the values are added up, we obtain a dose that is "effectively" like a uniform whole-body dose. We are all exposed to around 3 mGy mrad of radiation every year from natural sources coming from space and radioactive sources in the earth, building materials, and other natural sources. Radiation workers who may have ificant exposures are routinely monitored for their external doses by wearing radiation measuring devices and having these devices evaluated at periodic intervals.
Mass is most often expressed in terms of grams or kilograms g or kg. Answers are the professional opinions of the expert responding to each question; they do not necessarily represent the position of the Health Physics Society. How is dose important in radiation wha