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2014-10-26 11:05:10

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  1. where is the CR for a right or left lateral facial bones (orbits)
    how do we adjust pts body into a true lateral
    CR at level of zygoma (cheek bone) midway between eam and outer canthus

    oblique the patient in rao or lao
  2. which side is closest to IR when doing facial bones (orbits)
    side of injury should be closest to the IR
  3. what line is perp to IR and which is parallel to IR when doing a lateral facial bone (orbits) position
    what must we to the chine in order to bring IOML perp to front edge of IR
    • IPL perp
    • MSP parallel
    • tuck the chin down
  4. what two points can we palpate to ensure they are equidistant from the tabletop in a lateral facial position
    external occipital protuberance and nasion or glabella
  5. In the parietoacanthial projection of the facial bones where is the cr exiting
    CR perp to IR and centered to exit at the acanthion
  6. In parietoacanthial (waters) projection for facial bones (orbits) which line is perp to the IR
    In this position what line forms a 37 degree angle with the table/IR
    how do we ensure no rotation or tilt with these positions ( 2 areas of palpation)
    • MML (mentomeatal)
    • OML

    palpate the mastoid process of each side and lateral orbital margins
  7. what is the CR angle for a pa axial caldwell facial bone (orbits) and where is the cr exiting
    which line is

    what line is needed to be perp to the table

    If the area of interest is the orbital floors in this position what angle would you need to use and why
    15 deg caudad centered to exit at the nasion


    30 deg caudad to project petrous ridges below the infraorbital margins
  8. A good caldwell method for facial bones (orbits) shows what structure and where
    petrous ridges in lower 1/3 of the orbit
  9. what line is perp to the table in an modified waters method (modified parietoacanthial) for facial bones (orbits)

    what line forms a _____ deg angle with the IR

    OML; 55deg
  10. where is the CR centered to exit in the modified waters position for facial bones (orbits)
    at acanthion
  11. what bone can you do tabletop of the face and w/o a grid
    what is not recommended when doing this position
    • nasal bones
    • using AEC because it is a small area (can use same technique as a hand)
  12. in the lateral position of the nasal bone where is the CR
    What two lines are perp to the table and IR which is parallel
    .5inch inferior to nasion

    IPL and IOML

  13. where is the CR for the superoinferior tangential (axial) projection for nasal bones
    what direction is the CR and how much angle
    Is the cassette length or cross?
    CR to nasion

    Cr is caudad and angle as much needed to keep it as parallel to GAL (glabelloalveolar line)

  14. what is needed in the axial projection of the nasal bones to keep the GAL perp to IR
    Place a sponge under the IR with the IR under the pts chin on an angle
  15. what is the routine and special for facial bones (orbits)
    • right or left lateral which ever side is affected
    • parietoacanthial (waters method)
    • Caldwell

    • Special:
    • Modified waters (modified parietoacanthial)
  16. what is the routine for nasal bones and special
    • routine:
    • lateral both (R&L)
    • waters method

    • Special:
    • superoinferior (axial)
  17. what is the routine for zygomatic arches
    • SMV
    • Oblique inferosuperior (tangential)
    • ap axial (modified towne method)
    • parietoacanthial (waters method)
  18. What size cassette do we need for most facial boes
  19. where is the cr for an SMV projection of the zygomatic arches
    which line is parallel to IR
    • 1.5 in below mandibular symphysis
    • IOML
  20. Nasal bones are done table top true or false
  21. The cassette is crosswise or lengthwise in a Facial bone xray lateral
    what size
    • lengthwise
    • 8x10
  22. For a waters method the cassette is length or cross
  23. For a caldwell the cassette is length or cross wise
    For a modified waters the cassette is length or cross
    For a nasal bone lateral that requires both sides the cassette is length or cross
    • length
    • length
    • cross with cassette on table
  24. For the axial position of the nasal bones the the IR is cross or length
    For the SMV projection for the arches the IR is length or cross
    • cross
    • cross
  25. For the oblique inferosuperior tangential projection of the zygomatic arches the cassette is length or cross
    For the ap axial towne method for the arches the cassette is length or cross
    • length
    • cross
  26. For the SMV position of the arches what must we do to the patient to keep the IOML parallel to the IR
    Hyper extend patients neck until IOML is parallel
  27. For the oblique inferosuperior (tangential) projection for the arches how many degrees must we rotate the head towards the affected side and tilt it?
    • 15 deg toward side to be examined
    • tilt chin 15 deg toward side of interest
  28. oblique inferosuperior (tangential) projection which line is parallel with the IR
    Where is the CR for this position
    what aternative position is easier for the patient
    • IOML
    • CR to zygomatic arch of interest (CR skims mandibular ramus, passes through arc and skims parietal eminence on the downside)
    • doing it standing
  29. Where is the CR for a townes view of the zyg arches (both)
    How much cr angle is needed and in what direction to which lines
    Where is the cr entering
    • angle CR 30 deg caudad to OML or 37 to IOML
    • CR 1 inch superior to glabella to pass through (mid arches) at the level of the gonion