Properties of Xray

  1. X-radiation
    Waves of extrmely high energy composed of individual units on energy called photons.
  2. How fast does Xray travel
    The speed of light 186,000 miles per second
  3. Xray beam can be limited in size by lead shutter like structures
  4. Where is flourescence used?
    used in intensifying screens
  5. What is the effect of photographic emulsion
    creates the image
  6. What is Ionization
    the ability to divorce electrons from matter
  7. scatter
    photons bouncing off objects (our enemy)
  8. anode
    the positive end of the tube
  9. cathode
    negative end of the tube
  10. Filament end of the tube
    cathode filaments
  11. slanted end of the tube
    anode target
  12. For upright xrays which end on the tube is down
  13. For upright xrays which end of the tube is up
  14. Starting with closest to the wall what are the four elements behind the body when taking an xray
    lead barrier, film cassett (electronic image detector), grid, wall bucky
  15. On/Off
    Turns generator on but no xrays is produced yet
  16. mA station
    Stands for milliamperage. Controls how much the cathode filament will be heated to "boil off" electrons
  17. Timer
    Labeled "S" for seconds. controls how long the filaments will be heated.
  18. kV dial
    stands for kilovoltage. controls the positive charge which draws the electrons from the cathode filaments over to the anode taget. The higher the kV setting the more force.
  19. exposure switch
    Initiates the exposure, will shut off according to the settings you have set.
  20. bucky on /bucky off switch
    turns of the reciprocating grid (may not have one)
  21. line compentsator
    dial which you can turn to compensate for electrical drain on the circuit (may not have one)
  22. Transformer
    to step up the line voltage
  23. What is the job of the xray?
    to turn the film black
  24. xrays are affected by three factors what are they?
    amount of mAs and kV for the beam, density of the body part, and thickness of the body part (centimeters)
  25. non-ionizing radiation
    all electromagnitic energy propagating through the atmosphere (light, microwave, tv, radio).
  26. Ionizing radiation
    electromagnetic radiation that is of whort enough wave lengths and high enough energy to pass through solids and divorce electrons from atoms (xrays)
  27. Radioactive
    a substance (isotope) that itself emits radiation (plutonium not xrays)
  28. mAs
    electron cloud
  29. 3 types of radiation
    • Primary - radiation exiting from the tube through the cullimator
    • Remnant - radiation going through the body to reach and expose the film
    • unnecessary - leakage or scatter
  30. radiolucent
    material through which xrays can readily pass (looks black on film i.e. air or gas)
  31. radiopaque, radiopacity
    material dense or thick enough so that xrays cannot readily pass through it. (looks white on film i.e. metal or bone)
  32. CR
    central ray or center of the primary beam (X of collimator light)
  33. SID
    Source-to-image distance. How far tube (anode) is from film
  34. OFD
    Object-to-film ditance. How are patient/part is from film
  35. Study
    a froup of radiographs taken of one body region on one occasion. (Ex: lumbar dtrudy, or cervical study)
  36. Serial readiographs
    a study taken at a subsequent time (different date) for purpose of re-eval)
  37. Comparative radiographs
    a study of left and right comparable parts taken on one occasion
  38. Bucky
    surface against which the patient stands
  39. DR
    direct digital radiography
  40. CR
    computed radiography
  41. cassett
    aur tight holder for film
  42. intensifying screens
    wheets of cardboard coated iwth flourescent material, increasing the amount of exposure of the film by emitting visible light when the fluorescent crystals on the screens are struck by x-rays
  43. what info needs to be listed on the ID card
    • Name of Practice
    • date
    • phone
    • patient name
    • bdate or age
  44. Film markers
    Lead markers that mark the left or right side of the patient (some show recumbant and upright)
  45. What data should be logged when taking xrays
    • Patients Name, age and sex
    • Date of xrays
    • Which xrays were taken, including retakes
    • technique factors used
    • any changes from standard protocol
  46. What 3 types of laws govern the practice of any health care profession in any state?
    • Statute
    • Administrative rules
    • Case law
  47. What is a statute?
    A bill introduced into the state legislature, passes the house and senate and signed by the governor. Also known as RCW (revised code of WA)
  48. What is am Administrative rule?
    Each state has various department and boards that are authorized to pass admin rules. (Chiropractic Quality Assurance commission and Medical Quality Assurance commission are two of these departments) Also known as WAC's
  49. What is Case Law?
    These are cases that have set precedents.
  50. Failure to possess and exercise skill, care and learning is called what?
  51. Why was the WAC Radiographic standards put in place?
    because of concerns about over-radiation and unnecessary xray exposure.
  52. Who owns the xrays?
    To the doctor/facility that produced them.
  53. Collimation has 3 purposes?
    • Safety
    • Aiming alignment
    • Image quality
Card Set
Properties of Xray
Properties of Xray