Radiology III

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Radiology III
2010-09-23 23:59:52
Radioloy study III

Worksheet III
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  1. What is the actual xray film composed of?
    Flexible, thin, polyester plastic
  2. What is the emulsion composed of?
    Silver halide crystals, in a gelatin base.
  3. What are halides compounds of?
    Chlorine, bromin, and iodine.
  4. What is a " Latent image "?
    An image stored on an exposed film, that doesn't show until it is porcessed or developed.
  5. What does the film packet have on the outside of it?

    A sealed plastic wrap.

    To protect the film from moisture and light.
  6. What two things, other than the film, are found inside the packet?
    Black paper, and lead foil.
  7. What does the lead foil do?
    Absorbs unused xrays.
  8. What are the 5 film sizes and what are they most commonly used for?
    • 0- pedo (children)
    • 1- narrow anterior
    • 2- adults
    • 3- long bite-wings
    • 4- occlusal
  9. List 3 types of intraoral radiographs.
    Periapical (PA), Bitewings (BW), Occlusal
  10. What do periapical xrays show?
    Entire tooth and surrounding area.
  11. What portion of the teeth do bitewings show, and what are they primarily used for?
    Coronal portion of max and mand.

    Detect Interproximal decay.
  12. Why are occlusal films taken?
    To show large areas of either the max or mand arch.
  13. List 4 processes occlusal films may show.
    Cysts, stones, fractures, supernumerary
  14. What does FMX stand for?

    typically how may films are involved?
    Full mouth xray

  15. What are the two most common extraoral radiographs taken?
    Panoramic and cephalometric (cefa - lo - metric)
  16. What are 4 uses of extraoral film, What do they show?
    TMJ, Fractures, impactions, Pathology
  17. What is the film holder for extraoral film called?
  18. Short scale contrast is mostly _____ and _____.
    Black and White
  19. Long scale contrast contains multiple shades of ______.