Imaging Ch. 1, 2, 3

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Imaging Ch. 1, 2, 3

VT 181 review questions from chapters 1, 2 & 3 of Radiography in Veterinary Technology, 4th ed. By Lisa M. Lavin.


Questions and Answers
  • 1. 
    The negatively charged particle of an atom is the:
    • A. 

      Proton

    • B. 

      Neutron

    • C. 

      Electron

    • D. 

      Nucleus

  • 2. 
    As x-rays pass through materials, they have the ability to:
    • A. 

      Cause substances to fluoresce

    • B. 

      Completely remove an electron from an atom, leaving the atom positively charged

    • C. 

      Cause chemical changes that can kill cells

    • D. 

      All of the above

  • 3. 
    Which of the following statements is true?
    • A. 

      X-rays with longer wavelengths penetrate farther than x-rays with shorter wavelengths.

    • B. 

      X-rays with shorter wavelengths penetrate farther than x-rays with longer wavelengths.

    • C. 

      Electromagnetic radiation with lower frequency has more penetrating power through space and matter.

    • D. 

      Gamma rays are required for the production of a radiograph

  • 4. 
    Electrons travel:
    • A. 

      Toward the cathode in an x-ray tube.

    • B. 

      Away from the anode in an x-ray tube.

    • C. 

      Toward the anode in an x-ray tube.

    • D. 

      Within the nucleus of an atom.

  • 5. 
    In x-ray tubes, the majority of energy produced by the movement of electrons is in the form of:
    • A. 

      Light

    • B. 

      Heat

    • C. 

      Sound

    • D. 

      X-ray energy

  • 6. 
    On the electromagnetic spectrum, in relation to visible light, x-rays:
    • A. 

      Have a longer wavelength.

    • B. 

      Have a lower frequency.

    • C. 

      Have a shorter wavelength.

    • D. 

      Are closer in wavelength to infrared rays than light waves.

  • 7. 
    Bundles of energy that travel in a wave are called:
    • A. 

      Photons

    • B. 

      Quanta

    • C. 

      All of the above

  • 8. 
    X-ray electromagnetic radiation travels in a straight line, the direction of which can be altered.
    • A. 

      True

    • B. 

      False

  • 9. 
    A radiograph is synonymous with an x-ray
    • A. 

      True

    • B. 

      False

  • 10. 
    X-rays were discovered by Wilhelm Conrad Roentgen in the year _____?
  • 11. 
    Filaments located in an x-ray tube:
    • A. 

      Are made of molybdenum.

    • B. 

      Must have a low melting point and low atomic number.

    • C. 

      Are found in the anode.

    • D. 

      Emit electrons when heated.

  • 12. 
    The anode's target:
    • A. 

      Is composed of tungsten.

    • B. 

      Reaches temperatures in excess of 1000 degrees C during x-ray production.

    • C. 

      Usually has a copper base.

    • D. 

      All of the above.

  • 13. 
    Which of the following are limitations of the stationary anode?
    • A. 

      The target is made of tungsten.

    • B. 

      It is unable to withstand large amounts of heat.

    • C. 

      If the target becomes pitted, radiographs appear darker.

    • D. 

      It is limited to a larger focal spot to accomodate higher temperatures.

  • 14. 
    How can the technician help to prolong the life of the filament in the x-ray tube?
    • A. 

      Enter the proper exposure settings in the control panel before the final positioning of the animal.

    • B. 

      Leave the s-ray unit on at all times to ensure that the filament is heated when the radiograph is requested.

    • C. 

      Always leave the x-ray unit in the standby mode.

    • D. 

      The technician can do nothing because filament defects are largely the fault of the maufacturer.

  • 15. 
    Which of the following are possible effects of excessive heat within an x-ray tube?
    • A. 

      Bearing failure and decreased anode speed.

    • B. 

      Roughened target surface.

    • C. 

      Arcing.

    • D. 

      All of the above.

  • 16. 
    A small amount of air within the glass envelope is beneficial because it helps to dissipate heat.
    • A. 

      True

    • B. 

      False

  • 17. 
    Veterinary patients have a tendency to move while being positioned for radiographs to be taken. The radiographer should help to safely prevent artifacts of movement by:
    • A. 

      Using the shortest exposure time possible.

    • B. 

      Altering the direction in which x-rays move.

    • C. 

      Selecting a longer exposure time than is recommended.

    • D. 

      Sedating all patients before taking radiographs.

  • 18. 
    Which of the following is recommended to reduce unnecessary radiation of the patient or persons restraining the patient and to decrease scatter radiation?
    • A. 

      Opening the collimator as wide as possible.

    • B. 

      Placement of a lead apron over the area of interest on the patient.

    • C. 

      Selection of full-wave rectification as opposed to half-wave rectification.

    • D. 

      Adjustment of the collimator so that the smallest field size possible is used.

  • 19. 
    Which of the following is a type of somatic damage caused by radiation?
    • A. 

      Gene mutation

    • B. 

      Cataracts

    • C. 

      Sterility

    • D. 

      None of the above

  • 20. 
    Genetic damage is not detectable until future generations are produced.
    • A. 

      True

    • B. 

      False

  • 21. 
    What is the upper limit of exposure that an occupationally exposed individual may receive according to state and federal regulations?
    • A. 

      0.5 Sv/year

    • B. 

      100 rem/year

    • C. 

      0.05 Sv/year

    • D. 

      0.005 Sv/year

  • 22. 
    All of the following are true except:
    • A. 

      Animals cells are not as susceptible to damage from irradiation as human cells.

    • B. 

      Radiation can affect the body's ability to produce red and white blood cells.

    • C. 

      Exposure to radiation can affect the lens by causing cataracts.

    • D. 

      Individuals younger than 18 years of age may not assist with animal restraint while radiographs are taken.

  • 23. 
    What type of dosimeter can be stored for years, maintain its information, and can be reused?
    • A. 

      Pocket ionization chamber

    • B. 

      Collimator

    • C. 

      Thermoluminescent dosimeter

    • D. 

      Film badge

  • 24. 
    Scatter depends on:
    • A. 

      The intensity of the beam

    • B. 

      The composition of the structure being radiographed

    • C. 

      Kilovoltage (kVp) level

    • D. 

      All of the above

  • 25. 
    What is the thickness of the lead-lined rubber lining protective apparel in veterinary radiography?
    • A. 

      1 cm

    • B. 

      10 mm

    • C. 

      0.5 mm

    • D. 

      0.5

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