Chapter 2 Flashcards
(28 cards)
Radiation
Kenetic energy that passes from one location to another and can have many manifestations
Mechanical vibrations
Travel through air or materials to interact with structures in human ear to produce sound
Ultrasound
Mechanical vibrations of material rate of vibration does not stimulate the human ear sensors
Electromagnetic spectrum
Full range of frequencies and wavelengths
Ionization
Electromagnetic radiation is of a high enough frequency transfer energy to orbit electron to remove from atom
Equivalent dose
Quantity used for radiation protection purposes when a person receives exposure from various types of ionizing radiation
Effective dose
Manufactured quantity all dose of all types of ionizing radiation “weighting factors”
Genetic damage
Damage to generations not yet born
Terrestrial radiation
Radioactive materials from the crust of the earth
Cosmic radiation
Sun solar and beyond solar system
Internal radiation
Radioactive Atoms that make up percent of body tissue
Radiation dose
Amount of radiation absorbed by body
Radiation considered ionizing
X-rays. gamma rays. high energy ultraviolet radiation (higher than 10ev)
Radiation considered non-ionizing
Low energy UV. Visible light. infrared rays. microwaves. radio waves
Foundation of interactions of x-rays and human
Ionization
What makes up particulate radiation
Alpha particles and beta particles
Know the difference between electrons and beta particles
Their origin
What equivalent dose attempts to do
Specify numerically differences in transferred energy and potential biologic harm produced by different types of radiation
Occupational and nonoccupational dose limits are expressed in
Effective dose and stated in sieverts
What is cellular damage
Abnormal cell function loss of cell function
Two categories of ionizing radiation
Natural man-made
Examples of man-made radiation
CT nuclear medicine powerplants
When and where three-mile accident occurred
15 miles south east of Harrisburg Pennsylvania March 28, 1979
When and where Chernobyl accident happened
Near Kiev in Ukraine April 26 1986