Ch. 10 X-ray Imaging

33 Questions | Total Attempts: 705

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Xray Quizzes & Trivia

Compton, photeletric integration, KeV, K-shell, incident photons


Questions and Answers
  • 1. 
    List the five (4) basic x-ray interactions with matter: 3. through the photoelectric effect
  • 2. 
    The higher the xray energy the __________________ the wavelength
    • A. 

      Longer

    • B. 

      Shorter

    • C. 

      Higher

    • D. 

      Bigger

  • 3. 
    Low-energy x-rays (Thompson) tend to interact with the _____________
    • A. 

      Z#

    • B. 

      High-energy x-rays

    • C. 

      Photoelectrons

    • D. 

      Targer atom

  • 4. 
    A change in the direction of the x-ray w/out a change in it's energy is called:
    • A. 

      Coherent scattering

    • B. 

      Photodisintegration

    • C. 

      Compton effect

  • 5. 
    X-rays with 5 kev of energy are most likely to undergo _______________ scattering
    • A. 

      Coherent

    • B. 

      Compton

    • C. 

      Backscatter

    • D. 

      Electron

  • 6. 
    What produces a uniform density of the radiograph called image noise?
    • A. 

      Image fog

    • B. 

      Filter

    • C. 

      Photidisintegration

    • D. 

      Coherent scattering

  • 7. 
    ____________ characterized by no energy transfer therefore no ionization
    • A. 

      Scattered x-ray

    • B. 

      Fluoroscopy

    • C. 

      Compton interaction

    • D. 

      Pair production

  • 8. 
    Compton effect: most of the incident photon energy is retained by the___________________
    • A. 

      Photoelectron

    • B. 

      Scattered x-ray

    • C. 

      X-ray

    • D. 

      K-shell

  • 9. 
    The formula Ei : E, + (Eu + Ers) represents the_______________  
    • A. 

      Photoelectron

    • B. 

      Compton effect

    • C. 

      Thompson

    • D. 

      Pair production

  • 10. 
    is responsible for the cassette-hinge sometimes seen on a radiographic image.
    • A. 

      Scattered x-ray

    • B. 

      Image fog

    • C. 

      Image noise

    • D. 

      Backscatter

  • 11. 
    After a Compton interaction, the Compton secondary electron drops into a______________- in an electron shell previously created by some other ___________________ event
    • A. 

      Vacancy, ionizing

    • B. 

      Another shell, ionizing

    • C. 

      Outer shell, photoelectric

    • D. 

      L-shell, photoelectric

  • 12. 
    The probability that an x-ray will undergo a  photoelectricinteractionisapproximately__________times greater in bone than in soft tissue.
    • A. 

      10

    • B. 

      4

    • C. 

      7

    • D. 

      2

  • 13. 
    The source of most of the occupational exposure to radiation comes from the_________ during ________________
    • A. 

      Diagnostic x-ray, an exam

    • B. 

      Light, x-ray

    • C. 

      Patient, an exam

    • D. 

      Patient, fluroscopy

  • 14. 
    The two types of interaction that are of primary importance due to the levels of energy in diagnostic radiology are____________ and ________________
  • 15. 
    The probability of a Compton interaction is _____________of the atomic number of the atom involved.
    • A. 

      Proportional

    • B. 

      Independent

    • C. 

      Inversely proportional

    • D. 

      Depending

  • 16. 
    In a Compton interaction, at a deflection of zero (0) degrees from the incident photon,________________ energy is transferred.
    • A. 

      100%

    • B. 

      50%

    • C. 

      0

    • D. 

      35%

  • 17. 
    An x-ray undergoes an ionizing interaction with an inner-shell electron and is totally absorbed best describes the --
    • A. 

      Photoelectric effect

    • B. 

      Compton effect

    • C. 

      Butterfly iffect

    • D. 

      Pair production

  • 18. 
    During Compton scattering, photon interaction is more likely to occur with ________________ electrons
    • A. 

      Low energy

    • B. 

      Scattered

    • C. 

      High energy

  • 19. 
    The formula Er.: Ki- Ku may be used to calculate the energy of the electron emitted during a _________________ interaction
  • 20. 
    The type radiation emitted when an electron drops from an outer-shell to an inner-shell is _________________________
    • A. 

      Scattered

    • B. 

      K-shell

    • C. 

      Characteristic

    • D. 

      Photoelectric

  • 21. 
    Dwingphotoelectric effect interactions, (electron transition) the vacancy in the last shell is filled by a
    • A. 

      L-shell

    • B. 

      Inner shell

    • C. 

      Outer shell

    • D. 

      Electron

  • 22. 
    The probability of photoelectric interaction is _______________proportional to the_________ power of the atomic number of the absorbing material.
  • 23. 
    Aphotoelectric interaction cannot occur unless the incident x-ray has energy equal to or greater than the _____________________________
    • A. 

      Outer shell

    • B. 

      K-shell

    • C. 

      Target atom

    • D. 

      Electron binding energy

  • 24. 
    ____________ scattering is most likely to reduce contrast in a diagnostic x-ray image
    • A. 

      Coherent

    • B. 

      Covalent

    • C. 

      Compton

    • D. 

      Characteristic

  • 25. 
    The ____________________ effect results in the light areas on a radiograph (low optical density), such those corresponding to bone
    • A. 

      Photoelectric

    • B. 

      Image noise

    • C. 

      Compton