Dental Radiography

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  1. Who discovered x-rays
  2. Original radiographs are property of?
    The dentist
  3. Radiographic imaging technique that images an isolated "slice" of tissue while blurring out other structures
    Computed tomography (CT)
  4. Produced when high speed electrons are stopped or slowed down by the tungsten atoms of the dental x-ray tube
    Bremsstrahlung(general radiation)
  5. 5 Major components of the x-ray machine
    • 1.Line switch
    • 2.Milliampere (mA) selector
    • 3.Kilovolt peak (kVp)selector
    • 4.Timer
    • 5.Exposure button
  6. Shadow casting principles (list 5)
    • 1. small focal point
    • 2. long target-object distance
    • 3. short object image receptor
    • 4. Parallel relationship between object and image receptor
    • 5. perpendicular relationship between the central ray of the x-ray beam and both the object and the image receptor
  7. Greek name for periapical?
    peri (for around)
  8. legal dose of radiation?
    50/30 est. 4.5 grays
  9. Film that is placed in the oral cavity for exposure?
    intraoral dental film
  10. Designed for use outside the mouth?
    extraoral film
  11. Radiographer have patient hold the film? true/false
  12. Developer contains hydroquinone and Elon? true/false
  13. Bitewing does not capture crown to root tip? true/false
  14. During a PA film packet should be facing?
    incisal edge of the tooth
  15. Paralleling technique is the preferred technique? true/false
  16. Processing chemicals cannot be used indefinitely? true/false
  17. X-rays travel at the speed of sound? true/false
  18. Electricity is defined as electrons in motion? true/false
  19. A small focal spot reduces the size of the penumbra? true/false
  20. The film should be enclosed physical contact with the intensifying screen? true/false
  21. Often called Compton scattering, is similar to the photoelectric effect in that the dental x-ray interacts with an orbital electron and ejects it?
    Compton Effect
  22. Amounts for about 60% of the interactions of matter with the dental x-ray beam?
    Compton Effect
  23. Increasing the dose of radiation is the recommended method to make up for weak processing? true/false
  24. Only use standard protocol if patient is infected? true/false
  25. Life of processing solutions can be extended by replenishing? true/false
  26. Distortion of the radiographic image in which the tooth structures appear longer than the anatomical size; often caused by insufficient vertical angulation of the central beam?
    Elongated image
  27. Distortion of the radiographic image in which the tooth structures appear shorter than their actual anatomical size; most often caused by excessive vertical angulation of the central beam?
    Foreshortened image
  28. Laws vary from state to state on what DA can do with x-rays? true/false
  29. Image the apices of the teeth and the surrounding bone (the entire tooth, including the root end and surrounding bone)?
    Periapical examination
  30. Size 2 film is most popular for PA's (size 1 is acceptable)? true/false
  31. Shows whole mouth and surrounding structures (entire view)?
  32. Name of device that directs beam towards the patient?
  33. What is the speed of a wave called?
  34. Wavelengths used in diagnostic dental radiography range from 0.1 to 0.5 A; radiation with great penetrating power?
    Hard radiation
  35. Is the yoke in the extension arm insulated? Y/N
  36. Measures the number of electrons that move through a conductor; unit of quantity of electric current?
    amperage (A)
  37. What is radiographic density?
  38. What is penumbra?
    fuzziness (partial shadow around the objects of interest)
  39. Can radiation cause changes to genetic material of cells? Y/N
  40. Bisecting technique or paralleling technique?
    paralleling technique
  41. Absorbing material, usually aluminum, placed in the path of the beam of radiation to remove a high percentage of low energy (longer wavelength) x-rays?
  42. The invisible image produced when theĀ  film is exposed to x-ray photons; during radiation exposure x-rays strike and ionize some, but not all, of the silver halide crystals?
    Latent image
  43. What is placed in the film package to absorb scatter radiation?
  44. What size of the film faces the radiographer?
  45. Name the 4 components of the dental x-ray film?
    • 1. Film base
    • 2. Adhesive
    • 3. Emulsion
    • 4. protective layer
  46. Which processing solution prevents further film development?
  47. PPE? (4)
    • 1. gown
    • 2. mask
    • 3. gloves
    • 4. eye wear
  48. All patients have the legal right to make choices about the health care they receive; includes the right to refuse treatment?
  49. What are the units used to describe the angulation?
  50. How many films are used in a full mouth?
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Dental Radiography
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