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33 terms

2 Week vocab for radiology

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Anode
the positively charged electrode of the xray tube; server to decelerate the electrons as well as store and dissipate heat
Atom
the smallest divided part of matter that can enter into combination or chemical reactions with other atoms
Atomic number
the number of protons or positive charges in the nucleus of an atom
Atomic weight
the weight of an atom as compared to the weight of a carbon atom
Cathode
the negatively charged electrode in the xray tube that serves as a sourse of electrons
Electromagnetic radiation
the movement of electric and magnetic fields through space at the speed of light
Electron
a negatively charged particle that revolves around the nucleus of an atom in well defined orbits
Energy
the capacity for performing work
Focusing cup
a metal cup that surrounds and houses the filament and is negatively charged; its purpose is to condense or focus the electrons produced by thermonic emission
Glass envelope
the glass enclosure of an xray that provides structural support for the components and maintains the vacum necessary for operation
Heat unit
the unit of measure of the heat produced in an x ray tube during the production of an x-ray
Heel effect
the uneven distribution of x-rays from the anode to the cathode and of the tube; a decreased in the x-ray intensity at the anode end of the x-ray tube
Inertia
the resistance a body offers to any change in positon
Ionization
the addition or subtraction of an electrons from an atom caused by bombarding matter with x-radiation or electrons
Isotope
an atom of an element that has the same atomic number but more or fewer electrons
kilovoltage
a technical factor controlling the quality of radiation produced by a radiographic or fluoroscopic unit
kinetic energy
energy which is a result of a body being in motion
Line voltage compensator
a device that senses changes in incoming voltage and allows for either automatic or manual adjustment for the changes
Magnet
a substance with the power to attract ferromagnetic substances
Matter
anything that has mass and takes up space; possesses the propery of inertia
Milliampere-second
the production of milliamperage and time; a technical unit to determine the quanity of radiation produced during a radiographic exposure
Molecule
the smallest part of a substance that retains all the characterics of the original substance
Neutron
a particle contained within the nucleus of an atom having no charge
Nucleus
the central body of an atom, containing protons and electons
Potential energy
the energy inherent in a body at rest
proton
a particle contained within the nucleus of an atom, having a positive electrical charge
Rad
the unit of radiation absorbed dose recieved by human beings or animals
rectification
a process that prevents the flow of electrons from the anode to the cathode
Rem
the radiation equivalent man; quanities radiation dose for humans
Roentgen
the unit of radiation exposure or intensity, quantifies radiation output or exposure
Transformer
to coils of wire, insulated from one another and wraped around a single iron core whos purpose is to change voltage from one level to another
Work
the force applied multiplied by the distance through which the force acts
milliampere
1/1000 of a ampere