A unit of equivalent absorbed dose of radiation, taking account of the relative biological effectiveness of the particular radiation. The dose in rems is the dose in rads multiplied by the RBE.
The rem is the unit of radiation accounting for the different effects of different types of radiation. In order to calculate the equivalent dose in rem, absorbed dose must first be established. This number is then multiplied by a radiation weighting factor depending on the type of radiation. For beta particles and gamma rays, the weighting factor is 1. Most of the radioactive material released from Hanford emit beta particles and/or gamma rays, so it is easy to convert directly from rad to rem: 1 rad is equal to 1 rem. Doses from alpha particles and neutrons have larger weighting factors. [Back to Module 2
A unit of radiation absorbed dose equal to the product of the rads of absorbed radiation times the RBE.
The traditional unit of radiation equivalent dose and effective dose. The equivalent dose in rem is numerically equal to the absorbed dose in rad multiplied by a quality factor. One rem is equivalent to 0.01 sieverts (the international unit currently being used).
A unit of exposure to ionizing radiation; an estimate of the health risk that exposure to ionizing radiation could have on human tissue.
3/4 The former unit of dose equivalent. 1 rem = 0.01 Sv.
A unit of ionizing radiation in human tissue, equivalent to one roentgen of x-rays.
A unit of dose equivalency; equal to 0.01 sievert. See also Roentgen.
A measure of radiation dose related to biological effect. Fractions of a rem may be shown as millirem or centirem. Also, 1 rem equals 1 centisievert (cSv), and 100 rem equals 1 sievert (Sv).
A unit of dose, called the "dose equivalent," that is used in the regulatory, administrative, and engineering design aspects of radiation safety practice. The dose equivalent in rem is numerically equal to the absorbed dose in rad multiplied by the quality factor (1 rem is equal to 0.01 sievert).
a unit of nuclear radiation (dose) equivalent, ( adiation quivalent for ammals). An average person is exposed to 300 mrem/year.
a unit of equivalent dose. Not all radiation has the same biological effect, even for the same amount of absorbed dose. Rem relates the absorbed dose in human tissue to the effective biological damage of the radiation. It is determined by multiplying the number of rads by the quality factor, a number reflecting the potential damage caused by the particular type of radiation. The rem is the traditional unit of equivalent dose, but it is being replaced by the sievert (Sv), which is equal to 100 rem. For more information, see " Primer on Radiation Measurement" at the end of this document.
A unit of dose equivalent. One rem is equal to 10-2 Sievert.
A standard unit of radiation dose. Frequently radiation dose is measured in millirems for low-level radiation; 1,000 millirems equal one rem.
A rad equivalent man (rem) is the unit of measure of radioactive dose equivalent. The dose equivalent in rem equals the absorbed dose in rad multiplied by certain modifying factors. 1 rem=0.01 sievert.
The REM is a unit used to derive a quantity called equivalent dose. This relates to the absorbed dose in human tissue to the effective biological damage of the radiation. Not all radiation has the same biological effect, even for the same amount of absorbed dose.
Röntgen Equivalent Man. The older term used to describe dose equivalent. The rem is a product of the absorbed dose (in rads), the Quality Factor (or Radiation Weighting Factor) and any other modifying factors (like organ or tissue weighting factor). The SI unit is the Sievert (Sv). 1 Sv = 100 rem.
unit of radiation dose equivalent; rad x Q.
the special unit of dose equivalent. The dose equivalent in rem is numerically equal to the absorbed dose in rads multiplied by the quality factor, distribution factor, and any other necessary modifying factors.
Roentgen equivalent man, a unit used in radiation protection to measure the amount of damage to human tissue from a dose of ionizing radiation. Incorporates the health risks from radiation.
Roentgen Equivalent Man. A unit of radiation dosage that takes into account tissue damage due to neutron radiation. Convenient since it allows gamma, alpha and neutron radiation to be measured with the same units. 1000 rem will kill half the population exposed to the radiation. Yearly dose for submarine personnel is restricted to less than 25 millirem.
Roentgen equivalent man, equal to RADS or Roentgens
Acronym for “Roentgen Equivalent Man.” The unit of dose of any ionizing radiation that produces the same biological effect as a unit of absorbed dose of ordinary X-rays.
The special unit of dose equivalent. The dose equivalent in rem is equal to the absorbed dose in rad multiplied by a quality factor that accounts for the biological effect of the radiation. (1 rem = 0.01 sievert).
stands for radiation equivalent man, the dose in rems is equal to the dose in rads multiplied by the quality factor.
A unit of radiation dose equivalent. The dose equivalent in rem is numerically equal to the absorbed dose in rad multiplied by a quality factor. A mrem is 1e-3 Rem.
Unit of dose equivalent. Dose equivalent in rem is numerically equal to the absorbed dose in rad multiplied by a quality factor, distribution factor and any other necessary modifying factor (1 rem = 0.01 sievert).
Roentgen Equivalent Man. A measure of nuclear radiation causing biological damage.
The unit for equivalent dose that quantifies the amount of energy absorbed per gram of material times a factor for the type of radiation that imparted the energy. The unit used in countries other than the United States is the sievert (Sv). One Sv equals 100 rem.
The unit measuring an absorbed dose of ionizing radiation in biological matter; abbreviated from 'Roentgen Equivalent, Man.'
Rem (rem) ( roentgen equivalent man) is a non-SI unit of dose equivalent employed in radioprotection (rem = 10-2 Sv).
Roentgen equivalent man. The product of the absorbed dose in tissue, quality factor, and all other necessary modifying factors at the location of interest. "Unit of dose equivalent" (1 rem=0.01 sievert)
(Roentgen equivalent man) The rem is used to determine a quantity called an equivalent dose. It relates to the absorbed does in human tissue and both the known and assumed biological effects of different types of radiation. This measurement applies only to gamma rays and x-rays.
A radiation unit for equivalent dose. One rem is equal to 1 x 10-2 sievert. One millirem (mrem) is equal to one one-thousandth (10-3) of a rem.
A standard unit that measures the effects of ionizing radiation on humans.
a unit of radiation dosage that accounts for both the energy of the dose and its effectiveness in causing biological damage (from roentgen equivalent for man).
An acronym for Roentgen Equivalent Man.
A measure of dose deposited in body tissue, averaged over the body. One rem is approximately the dose from any radiation corresponding to exposure to one röntgen of radiation. The rem is no longer accepted for use with the International System. One rem is equivalent to 0.01 sievert.
A unit of biological dose of radiation; the name is derived from the initial letters of the term "roentgen equivalent man (or mammal)." The number of rems of radiation is equal to the number of rads absorbed multiplied by the RBE of the given radiation (for a specified effect). The rem is also the unit of dose equivalent, which is equal to the product of the number of rads absorbed and the "quality factor" of the radiation
common unit for measuring human radiation doses, usually in millirems (1,000 millirems = 1 rem).
roetgen equivalent man; a measurement unit of the energy absorbed in tissue when exposed to radiation; one rem equals one rad multiplied by a quality factor (Q) to convert rads into a common scale of biological damage; Q for external radiation is usually equal to 1, so rad and rem can be used interchangeably, but varies for internal radiation
A unit for measuring absorbed doses of radiation received by the body that includes an adjustment for the intensity of the damage to one or more cells. Rem is the abbreviation of roentgen equivalent man.
A unit of measure that takes into account the biologic effectiveness of various types of radiation. The rem is numerically equal to the rad multiplied by a Radiation Weighting Factor (formerly a "quality factor"). The Radiation Weighting Factor (RWF) reflects differences in the amount of each type of radiation necessary to produce the same biologic effect. For beta, gamma, and X radiation, RWF is 1.0, making their effect on tissue equivalent. The RWF for alpha particles is 20, indicating its biologic effect is 20 times greater that the effect of beta, gamma, or X radiation. Sievert (Sv) is replacing rem. One Sv is equal to 100 rem.
( Roentgen Equivalent Man): the unit which accompanies measurements of radiation dose.
The unit of dose equivalence, literally "roentgen equivalent man". The dose equivalence is equal to the absorbed dose of radiation (in rads), multiplied by any quality of modifying factors involved in a specific irradiation situation. One rem is a dose of any iodizing radiation estimated to produce a biological effect equivalent to that produced by one roentgen of x-ray radiation.
A measure of the actual biological effects of radiation absorbed in human tissue. A millirem is one-thousandth of a rem.
In radiation, Roentgen equivalent for man, a roentgen (an international unit of X- or gamma-radiation) adjusted for the atomic makeup of the human body. In ophthalmology, rapid eye movement.
A unit of dose equivalent. The word comes from the acronym, roentgen equivalent man and takes into account the biological effect from an absorbed dose of radiation.
a basic unit of radiation exposure, which is based on both the dose and the type of radiation. Because of this, it is more commonly used to describe radiation exposure than is the rad. Often reported in units of millirem (mrem), which is one-thousandth of a rem. The term rem is sometimes replaced by the sievert. It takes 100 rems to equal 1 seivert (see also sievert).
is the special unit of any of the quantities expressed as dose equivalent. The dose equivalent in rems is equal to the absorbed dose in rads multiplied by the quality factor (1 rem=0.01 sievert).