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66 Cards in this Set
- Front
- Back
Why is radiation harmful?
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It is ordorless, colorless, tasteless and it’s effects are cumulative.
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What specific precautions should be taken when working around ionizing radiation?
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A dosimetry badge should be worn as well as a lead apron and gloves. Tyroid collar, leaded glasses are also suggested. Never place any body part, including gloved hand in the primary beam.
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What personnel should not assist with radiographic procedures?
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Pregnant women or those under 18 years of age.
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Define: Electromagnetic radiation
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A method of transporting energy through space, distinguished by wavelength, frequency and energy.
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Define: Atom
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A basic part of matter that consists of a nucleus and a surrounding cloud of electrons.
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Define: Proton
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A positively charged particle located in the nucleus of an atom.
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Define: Neutron
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A neutral particle located in the nucleus of an atom.
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Define: Electron
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A negatively charged particle that travels around the nucleus.
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Define: Shell
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An electron’s orbital path and energy level.
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Define X-rays
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A form of electromagnetic radiation similar to visible light, but of a shorter wavelength.
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Define X-ray beam
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A number of x-rays traveling together through space at a rapid speed.
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Define Photons/Quanta
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A bundle of radiant energy (synonymous with photons)
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Define Radiograph
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A visible photographic record on film produced by x-rays passing through an object.
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Define Wavelength
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The distance between two consecutive corresponding points on a wave.
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The negatively charged particle of an atom is the:
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Electron
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As x-rays pass through materials, they have the ability to:
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a. Cause some substances to fluoresce (emit visible light)
b. Completely remove an electron from an atom, leaving the atom positively charged. c. Cause chemical changes that can kill cells. |
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True or Flase: X-rays with shorter wavelengths penetrate farther than rays with longer wavelengths.
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True.
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Electrons travel:
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Around the nucleus in a specific orbit called a shell
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Bundles of energy that travel in a wave are called:
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Photons, Quanta
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True or false: A radiograph and an x-ray are terms that can be used interchangeably.
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False.
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True or false: A radiograph and an x-ray are terms that can be used interchangeably.
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False.
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True or False: Electromagnetic radiation travels in a straight line and may be
redirected by various objects but will always travel in a straight line. |
True.
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Atoms consist of what 3 particles?
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Neutrons, protons, and electrons.
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Which of these 3 particles is located in the nucleus?
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Neutrons and photons.
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Sometimes we hear the term x-ray and radiograph used to mean the same thing. How
are they different? |
An x-ray is a form of electromagnetic radiation while a radiograph is the visible photographic record.
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Anode
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A positively charged electrode that acts as a target for the electrons from the cathode. Electrons interacting with the anode produce heat and x-rays.
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Cathode
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A negatively charged electrode that provides a source of electrons.
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Collimator
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A restricting device used to control the size of the primary x-ray beam.
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Console
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The control panel of the x-ray machine.
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Effective focal spot
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The area of the focal spot that is visible through the x-ray tube window and is directed toward the x-ray film.
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Filament
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Part of a low-energy circuit in the cathode that, when heated, releases electrons from their orbits.
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Focal spot
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The small area of the target with which electrons collide on the anode.
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Focusing cup
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A recessed area where the filament lies, directing the electrons towards the anode.
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Glass envelope
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A glass vacuum tube that contains the anode and cathode of the x-ray tube.
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Rotating anode
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An anode that turns on its axis to increase x-ray production while dissipating heat.
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Stationary anode
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A nonmoving anode, usually found in dental and small portable radiography units.
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Target
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Anode
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Tungsten
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A common metal used in the filament of the cathode.
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X-ray tubes
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A mechanism consisting of an anode and a cathode in a vacuum that produces a controlled x-ray beam.
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What is the primary purpose of the x-ray tube?
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To produce a controlled x-ray beam.
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What is the purpose of the cathode of an x-ray machine?
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To provide a source of electrons and direct these electrons toward the anode.
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What structures are found in the cathode?
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Coiled wire filament constructed of tungsten mounted on rigid wires, focusing cup made of molybdenum.
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The filament is constructed of what material?
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Tungsten
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Why do you think tungsten is used?
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Because of its high melting point and high atomic number.
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What is the function of the focusing cup?
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Directs the electrons towards the anode.
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What is the purpose of the anode of an x-ray machine?
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It’s a target for the electrons from the cathode.
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What structures are located in the anode?
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A beveled target of tungsten on a circular base of copper
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The target is composed of what type of material?
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Tungsten
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What is the purpose of a collimator on the x-ray machine?
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It’s used to control the size of the primary x-ray beam.
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kvp
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Energy of the xray that determines the penetrating power of the x-ray beam
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mA
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Number of x-rays produced during the exposure.
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The legal requirement for keeping radiographs is how many years?
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7 years.
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True or false. A small amount of air within the glass envelope is beneficial as it aids with heat dissipation
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True.
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True or false. X-rays with longer wavelengths have higher frequency and penetrate farther than shorter wavelengths.
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False.
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Electrons travel
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toward the anode.
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True or false. Ionization requires more energy than excitation
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True.
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Dosimeters, or radiation badges, are used to:
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monitor x-ray exposure.
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True or false. A Veterinary Technician may also be responsible for maintaining the development and fixative solutions in the film processors (automatic or manual).
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True.
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True or False. A Veterinary Technician may also be responsible and trained to complete other imaging techniques, such as Ultrasounds or Endoscopic procedures, to gather information to be interpreted by the radiologist.
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True.
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True or false. X-ray electromagnetic radiation travels in a straight line, however, the direction can be altered.
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True.
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True or false. Another appropriate name for a radiograph is an x-ray
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False.
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True or false. Veterinary Technicians are able to legally interpret patient radiographs as part of the diagnostic process.
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False.
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Wilhelm Conrad Roentgen discovered:
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x-rays.
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The number of cycles of the wave that pass a stationary point in a second defines:
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frequency.
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True or false. The radiograph is an important diagnostic tool
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True.
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Bundles of energy that travel in a wave are called:
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photons.
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