chapter 9

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MYKE
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242763
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chapter 9
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2013-10-24 23:45:52
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  1. X-RAYS INTERACT with matter in the following five ways:
    • (1) coherent scattering,
    • (2) Compton scattering,
    • (3) photoelectric effect,
    • (4) pair production, and
    • (5) photodisintegration.
  2. Only _____ scattering and _______ effect are important in making an x-ray image.
    • Compton
    • photoelectric
  3. The higher the energy of an x-ray, the _____ is its wavelength.
    shorter
  4. Consequently, low-energy x-rays tend to interact with ____ atoms
    whole
  5. ___________  x-rays generally interact with electrons, and high-energy x-rays generally interact with nuclei.
    moderate-energy
  6. X-rays with energies below approximately 10 keV interact with matter by ____ scattering
    coherent
  7. In _____ scattering, the incident x-ray interacts with a target atom, causing it to become excited
    coherent
  8. The result of ______ scattering is a change in direction of the x-ray without a change in its energy
    coherent
  9. an interaction with outer-shell electrons that not only scatters the x-ray but reduces its energy and ionizes the atom as well. This interaction is called ________
    Compton scattering
  10. X-rays scattered back in the direction of the incident x-ray beam are called _________
    backscatter radiation
  11. Compton scattering reduces image_______.
    contrast

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