- Industry: Government
- Number of terms: 33950
- Number of blossaries: 0
- Company Profile:
United States Department of Health and Human Services, Radiation Emergency Medical Management
A unit of exposure to x-rays or gamma rays. One roentgen is the amount of gamma or x-rays needed to produce ions carrying 1 electrostatic unit of electrical charge in 1 cubic centimetre of dry air under standard conditions.
Industry:Medical devices
A radioactive source, sealed in an impervious container that has sufficient mechanical strength to prevent contact with and dispersion of the radioactive material under the conditions of use and wear for which it was designed. Generally used for radiography or radiation therapy. May be classified "special form" on shipping papers and packages.
Industry:Medical devices
Ability of an analytical method to detect small concentrations of radioactive material.
Industry:Medical devices
The material between a radiation source and a potentially exposed person that reduces exposure.
Industry:Medical devices
A unit used to derive a quantity called dose equivalent. This relates 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. Dose equivalent is often expressed as millionths of a sievert, or micro-sieverts (µsv). One sievert is equivalent to 100 rem. For more information, see “primer on radiation measurement” from cdc.
Industry:Medical devices
Effects of radiation that are limited to the exposed person, as distinguished from genetic effects, which may also affect subsequent generations. See also teratogenic effects.
Industry:Medical devices
Plutonium and uranium enriched in the isotope uranium-233 or uranium 235. (chemical/biological/radiological incident handbook, central intelligence agency)
Industry:Medical devices
The proportion of a population expected to get a disease over a specified time period. See also risk, relative risk.
Industry:Medical devices
The amount of energy deposited by ionising radiation in a unit mass of tissue. It is expressed in units of joule per kilogramme (j/kg), and called “gray” (gy). For more information, see “primer on radiation measurement” from cdc.
Industry:Medical devices
Elements in the periodic table with atomic numbers from 90 to 103 (thorium to lawrencium); i.e., elements with a higher atomic number than actinium, which has an atomic number of 89. These are also called "rare earth metals." they include most of the well-known elements found in nuclear reactions. Actinides with atomic numbers higher than 92 do not occur naturally but are produced artificially by bombarding other elements with particles. Some of the actinides include plutonium, curium, and californium.
Industry:Medical devices
