Card Set Information

2010-01-06 16:40:17

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  1. What is general radiation also known as?
    Bremsstrahlung Radiation
  2. Radiation displaces an electron from the k shell of tungsten atom
    Characteristic Radiation
  3. Radiation that requires 70 or greater KvP
    Characteristic Radiation
  4. X-rays originate at the�
  5. Which electron has the highest binding energy to the nucleus?
    K shell electron
  6. The most common form of scatter radiation
    Compton Scatter
  7. Scatter where low energy x rays undergo a change in direction without a change in wavelength after interacting with matter
    Coherent Scatter
  8. X-rays are absorbed in materials and tissues by...
    photo-electric absorption
  9. The reduction of the intensity of an x-ray beam because of deflection or scattering as it passes through tissue
  10. How tissues absorb x-rays at different degrees. Ex: amalgam vs enamel
    Differential Absorption
  11. The image on the x-ray film before processing
    Latent Image
  12. The film layer that contains the silver halide crystals
  13. The nucleus of a helium atom ejected from a radioactive nucleus when it disintegrates
    Alpha particle
  14. Electrons emitted by the nucleus of a radioactive atom when it disintegrates
    Beta Particle
  15. The energy needed to eject an electron from an atom
    Binding energy
  16. Restricts the field of x-ray photons to a desired size and shape
  17. The difference in image density appearing on the radiograph
  18. A characteristic inherent in the type of film used
    Film Contrast
  19. Increased range of grays between blacks and whites on a radiograph
    Long Scale Contrast
  20. Reduced range of grays between blacks and whites on a radiograph
    Short Scale Contrast
  21. Minute subatomic particles such as protons, neutrons, and electrons and alpha and beta particles
    Corpuscular Radiation
  22. A device consisting of a light source, an aperture, and a light sensor used to measure optical density
  23. Elon and Hydroquinone; Reduce the halides in the film emulsion to metallic silver
    Developer agents
  24. Developer agent that brings out details
  25. Developer agent that is responsible for the blackening of the exposed silver halide crystals and bringing out contrast
  26. The unit of absorbed dose of the traditional system
  27. The unit of absorbed dose of the current system
    Gray (Gy)
  28. The total dose resulting from repeated exposure of the same region or of the whole body
    Cumulative Dose
  29. The amount of ionizing radiation absorbed by the gonads of the average person in a population over several generations that will result in a doubling of the rate of spontaneous mutations
    Doubling Dose
  30. The amount of radiation needed to cause erythema of the skin
    Erythema Dose
  31. The minimum dose that will produce a detectable degree of any given effect
    Threshold dose
  32. An instrument used to measure the accumulated dose of radiation
  33. Purpose is to relate exposure to risk; unit used to measure this is the sievert
    Effective Dose Equivalent
  34. A mixture of gelatin and silver halide crystals in which latent image formation takes place
  35. A coiled tungsten wire that, when heated to incandescence, emits electrons
  36. Material, usually aluminum, placed in the path of the x-ray beam to absorb the less penetrating x-rays
  37. A chemical solution that both removes the unexposed and underdeveloped silver halide crystals from the coated film emulsion and hardens the gelatin
  38. A machine that converts alternating current electrical power into a waveform suitable for the production of x-rays
  39. A unit of absorbed dose, or energy deposited in tissue
  40. The thickness of a given material required to reduce the ionizing effect of the primary beam of radiation to � its original value
    Half-value Layer
  41. Help to toughen and shrink the gelatin to the film emersion. Helps reduce the drying time while processing
  42. Unit of measurement of frequency of electromagnetic radiation
  43. How many impulses are in 1 second?
  44. A device used to convert x-ray energy to light energy. Consists of a card or plastic sheet coated with fluorescent material
    Intensifying screen
  45. The relationship between distance and radiation intensity in which the exposure varies inversely as the square of the distance from the source
    Inverse Square Law
  46. The maximum potential difference between anode and cathode in an x-ray tube
    Kilovoltage Peak
  47. A simulated false appearance of caries due to an optical illusion caused by the difference in contrast of objects such as enamel and dentin beside each other
    Match Band Effect
  48. The produce of milliamperes and time used to calculate changes in exposure
    Milliampere-seconds (mAs)
  49. The ejection of bound electrons by an incident x-ray photon such that the whole energy of the x-ray photon is absorbed and characteristic x-rays are produced
    Photoelectric Effect
  50. A particle equal in mass to an electron but having an equal but positive charge
  51. The theory that electromagnetic energy is transferred in discrete quanta or photons
    Quantum Theory
  52. Stands for radiation absorbed dose
  53. Conversion of AC to DC
  54. Chemicals that change the exposed silver halide crystals to black metallic silver
    Reducing Agents
  55. A superconcentrated solution of developer or fixer that is added daily or as indicated to the developer or fixer in the processing tank to compensate for loss of volume and loss of strength from oxidation
  56. Radiographic ability to discern between two objects that are close together; Ability of a film to record a true image
  57. Block the action of reducing agent on unexposed crystals. Keeps the film from being completely black
    Restrainers (antifogging agents)
  58. Form of radiation that is created at the instant the primary x-ray beam interacts with matter and gives off some of its energy forming new and less powerful wavelengths
    Secondary radiation
  59. A device that exposes film to a controlled set of light exposures. Used to evaluate a film�s response to exposure
  60. The SI unit associated with a rem. 1 rem=100 ? Equal to a gray
  61. All body cells except reproductive cells
    Somatic Cells
  62. Those effects in which the risk of getting the effects is dependent on the dose of radiation received. Ex: Cancer
    Stochastic Effect
  63. The escape of electrons from the heated filament in the cathode of an x-ray tube
    Thermionic Emission