Committed effective dose equivalent (CEDE)
Encyclopedia
The committed effective dose equivalent or CEDE is an estimate of the radiation dose to a person resulting from inhalation or ingestion of a given amount of radioactive substance. The CEDE is expressed in rem
or sievert
s (Sv). It takes into account the radiation sensitivities of different organs and the time a particular substance stays in the body, which can be up to a whole lifetime. For a radionuclide with an effective half-life
of three months or less, the committed dose is approximately equal to the annual dose. For radionuclides with longer half lives, the committed dose represents dose delivered during the year of intake as well as in the future. Unless otherwise stated, CEDE is the total dose accumulated over 50 years for occupationally exposed workers or 70 years for the general public.
Depending on the context, it can also refer to the radiation dose of a particular organ rather than the whole body.
Röntgen equivalent man
Named after Wilhelm Röntgen , the roentgen equivalent in man or rem is a unit of radiation dose equivalent...
or sievert
Sievert
The sievert is the International System of Units SI derived unit of dose equivalent radiation. It attempts to quantitatively evaluate the biological effects of ionizing radiation as opposed to just the absorbed dose of radiation energy, which is measured in gray...
s (Sv). It takes into account the radiation sensitivities of different organs and the time a particular substance stays in the body, which can be up to a whole lifetime. For a radionuclide with an effective half-life
Effective half-life
Effective half-life denotes the halving of radioactive material in a living organism by means of radioactive decay and biological excretion. A decay constant is needed to calculate the half-life...
of three months or less, the committed dose is approximately equal to the annual dose. For radionuclides with longer half lives, the committed dose represents dose delivered during the year of intake as well as in the future. Unless otherwise stated, CEDE is the total dose accumulated over 50 years for occupationally exposed workers or 70 years for the general public.
Depending on the context, it can also refer to the radiation dose of a particular organ rather than the whole body.
See also
- Radioactivity
- Radiation poisoningRadiation poisoningAcute radiation syndrome also known as radiation poisoning, radiation sickness or radiation toxicity, is a constellation of health effects which occur within several months of exposure to high amounts of ionizing radiation...
- Ionizing radiationIonizing radiationIonizing radiation is radiation composed of particles that individually have sufficient energy to remove an electron from an atom or molecule. This ionization produces free radicals, which are atoms or molecules containing unpaired electrons...
- Collective doseCollective doseCollective dose is a measure of the total amount of effective dose multiplied by the size of the exposed population. Collective dose is usually measured in units of person-rem or person-sieverts, or man-rem or man-sievert.-References:**-See also:...
- Total effective dose equivalentTotal effective dose equivalentThe Total effective dose equivalent is a dosimetric quantity used for comparing the health effects of radiation to the human body.TEDE is used by the United States Nuclear Regulatory Commission to define dose limits for occupationally exposed individuals and members of the general public...
- Deep-dose equivalentDeep-dose equivalentThe Deep-dose equivalent is the external whole-body exposure dose equivalent at a tissue depth of 1 cm .-References:*-See also:*Radioactivity*Radiation poisoning*Ionizing radiation*Total effective dose equivalent*Collective dose...
- Cumulative doseCumulative doseCumulative dose is the total dose resulting from repeated exposures of ionizing radiation to an occupationally exposed worker to the same portion of the body, or to the whole body, over a period of time.-References:*-See also:*Radioactivity...
- Committed dose equivalent