blood disorder resulting from bone marrow failure after exposure to ionizing radiation
Linear Energy Transfer (LET)
concept that helps explain the need for a quality, or modifying factor
SI
allows units to be used inter used interchangeably among all branches of science throughout the world
Leukemia
blood disorder resulting in abnormal overproduction of white blood cells after exposure to ionizing radiation
Air Kerma
kinetic energy released in a unit mass (kilogram) of air
Somatic Damage
biologic damage to the body caused by exposure to ionizing radiation
Gy
Si unit used to express D
Dose Area Product (DAP)
a measure of the amount of radiant energy that has been thrust into a portion of the patient's body surface
R
the photon (either x-ray or gamma ray) exposure that under standard conditions of pressure and temperature produces a total positive or negative charge of 2.58 x 10^-4 C/kg of dry air
Person-sievert
SI unit for the radiation quantity ColEfD
WR
a dimensionless factor (a multiplier) that was chosen for radiation protection purposes to account for differences in biologic impact among various types of ionizing radiation
Occupational Exposure
radiation exposure received by radiation workers in the course of exercising their professional responsibilities
EfD
the product of D x WR x WT
Crookes Tube
a pear-shaped, partial vacuum discharge tube
Gamma Radiation
short-wavelength, higher-energy electromagnetic waves emitted by the nuclei of radioactive substances
Skin Erythema Dose
unit used from 1900 to 1930 to measure radiation
EqD
product of D x Wr
TEDE
radiation quantity that is a particularly useful dose monitor for occupationally exposed personnel such as nuclear medicine technologists and interventional radiologists, who are likely to receive possibly significant radiation exposure during the course of a year
Sv
SI unit of EqD
D
amount of energy per unit mass absorbed by an irradiated object
Bragg-Gray Theory
relates the ionization produced in a small cavity within an irradiated medium or object to the energy absorbed in that medium or object to the energy absorbed in that medium as a result of its radiation exposure
Barium Platinocyanide
fluorescent material that coated the paper used when x-rays were discovered
Exposure
the amount of ionizing radiation that may strike an object such as the human body when in the vicinity of a radiation source
Tissue Kerma
the kinetic energy released in a unit mass of tissue
Effective Atomic Number (Zeff)
a composite, or weighted average, of the atomic numbers of the many chemical elements comprising the tissue