imaging Flashcards
(66 cards)
The energy imparted by ionizing radiation per unit mass of irradiated material
the units are the gray and the rad
absorbed dose
Making every reasonable effort to maintain exposures to radiation as far below the dose limits as practical
as low as reasonably achievable ( alara)
any machine utilizing rays for examination of the microscopic structure, elemental or chemical composition of materials
Analytical x ray machine or equipment
A device which provides a means to restrict the dimensions of the x ray field (collimator)
beam-limiting device
Radiation from cosmic sources: naturally occurring radioactive materials, including radon and global fallout as it exists in the environment from the testing of nuclear explosive devices
Background radiation
The authorization by the Illinois emergency management agency of an individual to perform industrial radiography in Illinois
Certification
CFR
code of federal regulations
The dose equivalent at a tissue depth of 1 cm from external whole body exposure
Deep dose equivalent
Irradiation by ionizing radiation, or radioactive material
Exposure
Portion of the dose equivalent, received from any source of radiation outside the body
External dose
Any area accessible to individuals in which radiation levels from radiation sources external to the body could result an individual receiving a dose equivalent, in excess of 1MSV in one hour at 30 cm from any source of radiation
High radiation area
Radiation that does not produce ionization such a sound, radio waves, visible infrared, and ultraviolet light
Non-ionizing radiation
the dose received by an individual in the course of employment
Occupational dose
Gamma, rays and x-rays, alpha and beta particles, high-speed electrons, neutrons, protons and other nuclear particles, or electromagnetic radiation is capable of producing ions, directly or indirectly in the passage through matter
Ionizing radiation or just radiation
An individual who has the knowledge and responsibility to apply appropriate radiation protection regulations, and has been assigned such responsibility by the licensee or registrant
Radiation, safety officer
Unit of dose equivalent. The dose equivalent in this does equivalent is equal to the absorbed dose in rad multiplied by the quality factor.
One of these equals 0.01sv
REM
Unit of exposure
Roentgen
The unit of dose equivalent in this is equal to the absorbed dose in gray multiplied by the quality factor
1sv= 100 REM
Sievert unit of dose equivalent
Adjustable beam-limiting or attenuating device usually made of lead fixed to an x-ray tube housing to intercept or collimate the useful beam
Shutter
For Purpose of external exposure (head, trunk, including male gonads, arms above the elbow or legs above the knee
Whole body
An artifact in digital imaging, caused by an under sampling, or inadequate sampling of incoming data
Aliasing
A reduction in the energy of the primary x-ray beam as it passes through matter by scattering absorption and photon transmission
Attenuation
Perpendicular to the long axis of the body, structure or parts
Axial
Divides the body into upper and lower, (superior and posterior) portions, or any transverse plane that forms right angles to the longitudinal plane
Axial or horizontal plane
