Cervical positioning

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Author:
runner0369
ID:
60849
Filename:
Cervical positioning
Updated:
2011-01-20 22:15:10
Tags:
cervical ray sherman Rush
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Flashcards for studying for x-ray positioning at Sherman, taught by Dr. Rush
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  1. What are the first 7 steps in cervical x-ray setup?
    • Artifacts
    • Lead vest
    • Marker
    • Cassette
    • Measure
    • Set factors
    • Normal head carriage
  2. What are steps 8 to 10?
    • For Standard unit:
    • bucky
    • patient
    • tube
    • For C-arm unit:
    • tube
    • bucky
    • patient
  3. What are steps 11 to 15?
    • Correct rotation
    • Head clamp
    • Collimate filtration
    • Instruct the patient
    • Make the exposure
  4. What are steps 16 to 20?
    • Release the head clamp
    • Change the cassette
    • Reset factors
    • Reposition marker
    • Return to step 7
  5. What points do we mark for a lateral?
    Glabella, filtrum, symphysis menti and left atlas TP
  6. What points do we mark for a Nasium?
    Glabella, filtrum, symphysis menti, lower 1/3rd of nose, and right atlas TP
  7. What points do we mark for an A-P open mouth?
    Glabella, filtrum, symphysis menti and right atlas TP
  8. What points do we mark for a BP?
    Glabella, filtrum, symphysis menti, angle of jaw and midpoint between angle of jaw and symphysis menti
  9. What views do you correct for rotation only?
    A-P and nasium
  10. What views do you correct for rotation and head tilt?
    BP and lateral
  11. What size cassette do we use?
    10 X 12
  12. How far in do we collimate?
    1/2 inch inside the 10 X 12 border
  13. Where do we measure for the lateral?
    Base of the neck with the calipers touching both sides of the neck and add 2 cm
  14. How is the central ray aligned for a lateral?
    Vertical and horizontal crosshair through atlas TP
  15. What is the focal film distance for a lateral? Why?
    • 72 inches
    • To reduce the magnification affect from increased object to bucky distance
  16. What is the bucky height for a lateral? Why?
    • Horizontal crosshair hits 1 inch above center
    • To get all of the lower cervicals on the film
  17. What is the bucky angle for a lateral?
    perpendicular to the floor
  18. What filtration is used for a lateral?
    3mm covering the orbits
  19. What is the minimum number of cervicals you want to see on a cervical film?
    7
  20. Where do you measure for the Nasium view?
    Lower 1/3rd of the nose to the EOP
  21. Where does the central ray go for the nasium?
    through lower 1/3rd of nose, through an area between the C1 TP and the bottom of the tragus notch to the center of the film
  22. Where must the doctor's eyes be?
    level to horizontal center of tube to site properly
  23. What is the focal film distance for nasium?
    40 inches
  24. What is the bucky angle for the nasium?
    head shoulder angle
  25. Where is the bucky height for the nasium?
    horizontal crosshair of tube hits the center of the bucky
  26. What is the tube angle for nasium?
    down 10 degrees
  27. What is the filtration for nasium?
    3mm down to but not touching the horizontal crosshair, 4mm up to but not touching the horizontal crosshair
  28. Where do you measure for A-P open mouth?
    below the lower lip to EOP
  29. Where does the central ray go for the A-P?
    Through the lower 1/3rd of open mouth and between atlas TP and bottom of tragus notch
  30. What is the focal film distance for an A-P?
    40 inches
  31. What is the bucky angle for an A-P open mouth?
    head shoulder angle
  32. What is the bucky height for A-P?
    horizontal crosshair hits 1 inch above center of bucky
  33. What is the tube angle for an A-P?
    18 degrees, for child one degree steeper than their age
  34. What filtration is used for A-P?
    3mm down to but not touching the horizontal crosshair, 4mm up to but not touching the horizontal crosshair
  35. What instructions do you give the patient in A-P?
    "Without tilting your head back, open your mouth wide and keep it open until I tell you to close your mouth."
  36. Where do you measure for the BP?
    symphysis menti to crown of head
  37. Where does the central ray go for a BP?
    through mid-point between symphysis menti and angle of jaw, hitting the bucky 1 inch below the center of the bucky
  38. What is the focal film distance for BP?
    44 inches
  39. What is the bucky angle for BP?
    50 degrees
  40. What will the protractor on the back of the bucky read for the BP?
    40 degrees
  41. What is the tube angle for the BP?
    50 degrees
  42. What is the bucky height for BP?
    central ray to 1 inch below the center of the film
  43. What shielding is used for the BP?
    lead apron

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