Radiology Quiz 3

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Radiology Quiz 3
2014-09-17 13:07:16
ch6equip ch7film ch8imagecharacteristics
equipment, film, image characteristics
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  1. who regulates how x-ray equipment is used
    state and local govnt
  2. Dental x-ray machines may be used to expose ___ receptors or ___ receptors
    • intraoral
    • extraoral
  3. what are 2 examples of extra oral units
    • panoramic
    • cephalometric
  4. what 3 components do x-ray machines have
    • tubehead
    • extension arm
    • control panel
  5. what houses the vacuum tube, collimator, pID
  6. what house the electrical wires, suspends and positions the tubehead
    extension arm
  7. what contains the on/off switch, control devices, exposure button
    control panel
  8. what allows regulation of the X-ray machine
    control panel
  9. what is used to hold and align intramural X-ray films in the mouth
    film holder
  10. what is used to help the radiographer position the PID
    beam allignment device
  11. what is a metal plate with an opening that can be used to restrict the size of beam and works with the beam alignment device
    collimating device
  12. what is the recording medium where images are recorded
    image receptor
  13. what are the 4 basic components of X-ray film
    • film base
    • adhesive layer
    • film emulsion
    • protective layer
  14. what provides strength and support for emulsion and is contracted to withstand heat, moisture, chemical exposure
    film base
  15. what covers both sides of film base and is added before emulsion (attaches emulsion to base)
    adhesive layer
  16. what is a delicate homogenous mixture of gelatin and silver halide crystals attached to both sides of film base by adhesive layer
    film emulsion
  17. where are the silver halide crystals suspended in gelatin where they absorb radiation and store the energy
    film emulsion
  18. what gives film greater sensitivity to xradiation
    film emulsion
  19. what is the thin coating over emulsion that protects it from manipulation, mechanical or processing damage
    protective layer
  20. what absorbs x-radiation during exposure and stores energy and varies depending on the density of the objects exposed
    silver halide crystals
  21. if silver halide crystal are not energized and image areas show up more radio opaque than others, then the was the density of the object more or less dense
  22. what invisible image remains invisible in the emulsion until it undergoes chemical processing procedures
    latent image
  23. what are irregularities in the lattice structure of the exposed crystals and attracts Ag
    sensitivity specks
  24. what are aggregates of Ag called
    latent image centers
  25. intraoral film packets placed inside the mouth come in 5 sizes and have 4 components...
    • xray film (double emulsion)
    • paper film wrapper (protects/sheilds from light)
    • lead foil sheet (shields secondary "fog")
    • outer package wrapping (seals,protects)
  26. what 2 things protect the film from light
    • paper film wrapper
    • outer package wrapping
  27. what shields the film from secondary, back scatter, radiation "fog"
    lead foil sheet
  28. what seals the film packet, protects it from light and saliva, and it's solid white side faces the tubehead
    outer package wrapping
  29. what type of film is used to examine the entire tooth and 2mm of the supporting bone (size 1 or 2)
    periapical film (PA)
  30. what type of film is used to examine the crowns and inter proximal spaces of both the maxillary/mandibular teeth (size 2)
    bitewing film (BW)
  31. what type of film is used to examine large areas of the maxilla or mandible (size 4)
    occlussal film
  32. ___ ___ is the amount of radiation required to produce a radiograph of standard density
    film speed
  33. what is determined by the size of the silver halide crystals, thickness of the emulsion, and the presence of radiosensitive dyes
    film speed
  34. what determines how much radiation and how much exposure time is necessary to produce an image
    film speed
  35. faster film requires___radiation exposure because the film responds faster
  36. __-speed film; nicer image, slower than E or F
  37. __-speed film is no longer available
  38. __-speed film is grainier image than D-speed, but 60% less radiation exposure
  39. what type of film is used to examine large areas of the jaws and teeth
  40. what type of film gives a wide view of maxilla and mandible and includes both TMJ joints
    panoramic film
  41. what type of film is used primarily for diagnosis of extraction of teeth, placement of implants, treatment of TMD, and orthodontics
  42. what type of film is of the profile of a patient, including entire maxillofacial region of bony and soft tissues
    cephalometric film