Card Set Information

2010-12-16 02:05:41
Final review week twelve

ch. twenty one, twenty four
Show Answers:

  1. In the occlusal technique, the film is positioned so that the ________side is facing the arch that is being exposed; and it is placed in the mouth between the ___________ surfaces of the teeth
    • white
    • occlusal
  2. occlusal technique that is usede to examine the palate and the anterior teeth of the maxilla
    maxillary topographic
  3. What angle is the PID directed at for each of the following projections?
    maxillary topographic
    maxillary lateral
    maxillary pediatric
    mandibular topographic
    mandibular cross sectional
    mandibular pediatric
    • +65
    • +60
    • +60
    • -55
    • 90
    • -55
  4. technique used to examine the palatal roots of the molar teeth, and may often be used to locate foreign bodies in the posterior maxilla
    maxillary lateral projection
  5. Used to examine the anterior teeth of the maxilla, and is recommended for used in children 5 or younger
    maxillary pediatric
  6. Used to examine the anterior teeth of the mandible
    mandibular topographic
  7. used to examine the buccal and lingual aspects of the mandible, also used to locate foreign bodies or salivary stones in the region of the floor of the mouth
    mandibular cross-sectional
  8. used to examine the anterior teeth of the mandible and is recommended for use in children 5 or younger
    mandibular pediatric
  9. Which of the following can a radiograph depict?
    • length
    • width
  10. rule governing the orientation of structures portrayed in two radiographs exposed at different angulations
    buccal object rule
  11. In the buccal object rule, 2 radiographs are taken with different ________ angles
  12. What is the mnemonic used for the buccal object rule? What does it mean?
    • SLOB
    • same lingual opposite buccal
  13. rule where one PA is taken, and then an occlusal film is exposed directing the central ray at a right angle to the film; primarily used for locating objects in the mandible
    right angle technique
  14. Why is less x-radiation neede for a digital image? and how much less exposure time is needed for digital radiography than conventional?
    • the typical sensor is more sensitive to x-rays then conventional film
    • 50-80%
  15. What do most digital radiography systems use for their x-radiation source?
    a conventional dental x-ray unit
  16. a small box or 'well' into which the electrons produced by the x-ray unit exposure are deposited, it is the digital equivalent of silver halide crystals used in conventional radiography
  17. true or false. A pixel is an ordered arrangement
  18. What are the two essential components in indirect digital imaging?
    • same as direct digital imaging:
    • x-ray machine
    • intraoral sensor
    • computor
    • and also:
    • CCD camera
  19. Why is indirect digital imaging considered inferior to direct digital imaging?
    the resultant image from direct digital is similar to a copy versus the original
  20. In the storage phosphor imaging system, what is used instead of a sensor with a fiber cable?
    reusable imaging plate coated with phosphor
  21. How are images cleared from storage phosphor image plates?
    by exposure to the view box light for several minutes
  22. What are the advantages of digital radiography?
    • superior gray-scale resolution
    • reduced exposure time to radiation
    • increased speed of image viewing
    • lower equipment cost - after the initial cost
    • increased efficiency
    • enahancement of diagnostic image
    • effective patient education tool
  23. What are the disadvantages of digital radiography?
    • Initial set up costs
    • image quality
    • sensor size
    • infection control
    • legal issues